| /* |
| * Copyright © 2019 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include <unistd.h> |
| |
| #include "common/gen_gem.h" |
| |
| #include "dev/gen_debug.h" |
| #include "dev/gen_device_info.h" |
| |
| #include "perf/gen_perf.h" |
| #include "perf/gen_perf_mdapi.h" |
| #include "perf/gen_perf_query.h" |
| #include "perf/gen_perf_regs.h" |
| |
| #include "drm-uapi/i915_drm.h" |
| |
| #include "util/u_math.h" |
| |
| #define FILE_DEBUG_FLAG DEBUG_PERFMON |
| #define MI_RPC_BO_SIZE 4096 |
| #define MI_FREQ_START_OFFSET_BYTES (3072) |
| #define MI_RPC_BO_END_OFFSET_BYTES (MI_RPC_BO_SIZE / 2) |
| #define MI_FREQ_END_OFFSET_BYTES (3076) |
| |
| #define MAP_READ (1 << 0) |
| #define MAP_WRITE (1 << 1) |
| |
| /** |
| * Periodic OA samples are read() into these buffer structures via the |
| * i915 perf kernel interface and appended to the |
| * perf_ctx->sample_buffers linked list. When we process the |
| * results of an OA metrics query we need to consider all the periodic |
| * samples between the Begin and End MI_REPORT_PERF_COUNT command |
| * markers. |
| * |
| * 'Periodic' is a simplification as there are other automatic reports |
| * written by the hardware also buffered here. |
| * |
| * Considering three queries, A, B and C: |
| * |
| * Time ----> |
| * ________________A_________________ |
| * | | |
| * | ________B_________ _____C___________ |
| * | | | | | | |
| * |
| * And an illustration of sample buffers read over this time frame: |
| * [HEAD ][ ][ ][ ][ ][ ][ ][ ][TAIL ] |
| * |
| * These nodes may hold samples for query A: |
| * [ ][ ][ A ][ A ][ A ][ A ][ A ][ ][ ] |
| * |
| * These nodes may hold samples for query B: |
| * [ ][ ][ B ][ B ][ B ][ ][ ][ ][ ] |
| * |
| * These nodes may hold samples for query C: |
| * [ ][ ][ ][ ][ ][ C ][ C ][ C ][ ] |
| * |
| * The illustration assumes we have an even distribution of periodic |
| * samples so all nodes have the same size plotted against time: |
| * |
| * Note, to simplify code, the list is never empty. |
| * |
| * With overlapping queries we can see that periodic OA reports may |
| * relate to multiple queries and care needs to be take to keep |
| * track of sample buffers until there are no queries that might |
| * depend on their contents. |
| * |
| * We use a node ref counting system where a reference ensures that a |
| * node and all following nodes can't be freed/recycled until the |
| * reference drops to zero. |
| * |
| * E.g. with a ref of one here: |
| * [ 0 ][ 0 ][ 1 ][ 0 ][ 0 ][ 0 ][ 0 ][ 0 ][ 0 ] |
| * |
| * These nodes could be freed or recycled ("reaped"): |
| * [ 0 ][ 0 ] |
| * |
| * These must be preserved until the leading ref drops to zero: |
| * [ 1 ][ 0 ][ 0 ][ 0 ][ 0 ][ 0 ][ 0 ] |
| * |
| * When a query starts we take a reference on the current tail of |
| * the list, knowing that no already-buffered samples can possibly |
| * relate to the newly-started query. A pointer to this node is |
| * also saved in the query object's ->oa.samples_head. |
| * |
| * E.g. starting query A while there are two nodes in .sample_buffers: |
| * ________________A________ |
| * | |
| * |
| * [ 0 ][ 1 ] |
| * ^_______ Add a reference and store pointer to node in |
| * A->oa.samples_head |
| * |
| * Moving forward to when the B query starts with no new buffer nodes: |
| * (for reference, i915 perf reads() are only done when queries finish) |
| * ________________A_______ |
| * | ________B___ |
| * | | |
| * |
| * [ 0 ][ 2 ] |
| * ^_______ Add a reference and store pointer to |
| * node in B->oa.samples_head |
| * |
| * Once a query is finished, after an OA query has become 'Ready', |
| * once the End OA report has landed and after we we have processed |
| * all the intermediate periodic samples then we drop the |
| * ->oa.samples_head reference we took at the start. |
| * |
| * So when the B query has finished we have: |
| * ________________A________ |
| * | ______B___________ |
| * | | | |
| * [ 0 ][ 1 ][ 0 ][ 0 ][ 0 ] |
| * ^_______ Drop B->oa.samples_head reference |
| * |
| * We still can't free these due to the A->oa.samples_head ref: |
| * [ 1 ][ 0 ][ 0 ][ 0 ] |
| * |
| * When the A query finishes: (note there's a new ref for C's samples_head) |
| * ________________A_________________ |
| * | | |
| * | _____C_________ |
| * | | | |
| * [ 0 ][ 0 ][ 0 ][ 0 ][ 1 ][ 0 ][ 0 ] |
| * ^_______ Drop A->oa.samples_head reference |
| * |
| * And we can now reap these nodes up to the C->oa.samples_head: |
| * [ X ][ X ][ X ][ X ] |
| * keeping -> [ 1 ][ 0 ][ 0 ] |
| * |
| * We reap old sample buffers each time we finish processing an OA |
| * query by iterating the sample_buffers list from the head until we |
| * find a referenced node and stop. |
| * |
| * Reaped buffers move to a perfquery.free_sample_buffers list and |
| * when we come to read() we first look to recycle a buffer from the |
| * free_sample_buffers list before allocating a new buffer. |
| */ |
| struct oa_sample_buf { |
| struct exec_node link; |
| int refcount; |
| int len; |
| uint8_t buf[I915_PERF_OA_SAMPLE_SIZE * 10]; |
| uint32_t last_timestamp; |
| }; |
| |
| /** |
| * gen representation of a performance query object. |
| * |
| * NB: We want to keep this structure relatively lean considering that |
| * applications may expect to allocate enough objects to be able to |
| * query around all draw calls in a frame. |
| */ |
| struct gen_perf_query_object |
| { |
| const struct gen_perf_query_info *queryinfo; |
| |
| /* See query->kind to know which state below is in use... */ |
| union { |
| struct { |
| |
| /** |
| * BO containing OA counter snapshots at query Begin/End time. |
| */ |
| void *bo; |
| |
| /** |
| * Address of mapped of @bo |
| */ |
| void *map; |
| |
| /** |
| * The MI_REPORT_PERF_COUNT command lets us specify a unique |
| * ID that will be reflected in the resulting OA report |
| * that's written by the GPU. This is the ID we're expecting |
| * in the begin report and the the end report should be |
| * @begin_report_id + 1. |
| */ |
| int begin_report_id; |
| |
| /** |
| * Reference the head of the brw->perfquery.sample_buffers |
| * list at the time that the query started (so we only need |
| * to look at nodes after this point when looking for samples |
| * related to this query) |
| * |
| * (See struct brw_oa_sample_buf description for more details) |
| */ |
| struct exec_node *samples_head; |
| |
| /** |
| * false while in the unaccumulated_elements list, and set to |
| * true when the final, end MI_RPC snapshot has been |
| * accumulated. |
| */ |
| bool results_accumulated; |
| |
| /** |
| * Frequency of the GT at begin and end of the query. |
| */ |
| uint64_t gt_frequency[2]; |
| |
| /** |
| * Accumulated OA results between begin and end of the query. |
| */ |
| struct gen_perf_query_result result; |
| } oa; |
| |
| struct { |
| /** |
| * BO containing starting and ending snapshots for the |
| * statistics counters. |
| */ |
| void *bo; |
| } pipeline_stats; |
| }; |
| }; |
| |
| struct gen_perf_context { |
| struct gen_perf_config *perf; |
| |
| void * ctx; /* driver context (eg, brw_context) */ |
| void * bufmgr; |
| const struct gen_device_info *devinfo; |
| |
| uint32_t hw_ctx; |
| int drm_fd; |
| |
| /* The i915 perf stream we open to setup + enable the OA counters */ |
| int oa_stream_fd; |
| |
| /* An i915 perf stream fd gives exclusive access to the OA unit that will |
| * report counter snapshots for a specific counter set/profile in a |
| * specific layout/format so we can only start OA queries that are |
| * compatible with the currently open fd... |
| */ |
| int current_oa_metrics_set_id; |
| int current_oa_format; |
| |
| /* List of buffers containing OA reports */ |
| struct exec_list sample_buffers; |
| |
| /* Cached list of empty sample buffers */ |
| struct exec_list free_sample_buffers; |
| |
| int n_active_oa_queries; |
| int n_active_pipeline_stats_queries; |
| |
| /* The number of queries depending on running OA counters which |
| * extends beyond brw_end_perf_query() since we need to wait until |
| * the last MI_RPC command has parsed by the GPU. |
| * |
| * Accurate accounting is important here as emitting an |
| * MI_REPORT_PERF_COUNT command while the OA unit is disabled will |
| * effectively hang the gpu. |
| */ |
| int n_oa_users; |
| |
| /* To help catch an spurious problem with the hardware or perf |
| * forwarding samples, we emit each MI_REPORT_PERF_COUNT command |
| * with a unique ID that we can explicitly check for... |
| */ |
| int next_query_start_report_id; |
| |
| /** |
| * An array of queries whose results haven't yet been assembled |
| * based on the data in buffer objects. |
| * |
| * These may be active, or have already ended. However, the |
| * results have not been requested. |
| */ |
| struct gen_perf_query_object **unaccumulated; |
| int unaccumulated_elements; |
| int unaccumulated_array_size; |
| |
| /* The total number of query objects so we can relinquish |
| * our exclusive access to perf if the application deletes |
| * all of its objects. (NB: We only disable perf while |
| * there are no active queries) |
| */ |
| int n_query_instances; |
| }; |
| |
| static bool |
| inc_n_users(struct gen_perf_context *perf_ctx) |
| { |
| if (perf_ctx->n_oa_users == 0 && |
| gen_ioctl(perf_ctx->oa_stream_fd, I915_PERF_IOCTL_ENABLE, 0) < 0) |
| { |
| return false; |
| } |
| ++perf_ctx->n_oa_users; |
| |
| return true; |
| } |
| |
| static void |
| dec_n_users(struct gen_perf_context *perf_ctx) |
| { |
| /* Disabling the i915 perf stream will effectively disable the OA |
| * counters. Note it's important to be sure there are no outstanding |
| * MI_RPC commands at this point since they could stall the CS |
| * indefinitely once OACONTROL is disabled. |
| */ |
| --perf_ctx->n_oa_users; |
| if (perf_ctx->n_oa_users == 0 && |
| gen_ioctl(perf_ctx->oa_stream_fd, I915_PERF_IOCTL_DISABLE, 0) < 0) |
| { |
| DBG("WARNING: Error disabling gen perf stream: %m\n"); |
| } |
| } |
| |
| static void |
| gen_perf_close(struct gen_perf_context *perfquery, |
| const struct gen_perf_query_info *query) |
| { |
| if (perfquery->oa_stream_fd != -1) { |
| close(perfquery->oa_stream_fd); |
| perfquery->oa_stream_fd = -1; |
| } |
| if (query->kind == GEN_PERF_QUERY_TYPE_RAW) { |
| struct gen_perf_query_info *raw_query = |
| (struct gen_perf_query_info *) query; |
| raw_query->oa_metrics_set_id = 0; |
| } |
| } |
| |
| static bool |
| gen_perf_open(struct gen_perf_context *perf_ctx, |
| int metrics_set_id, |
| int report_format, |
| int period_exponent, |
| int drm_fd, |
| uint32_t ctx_id) |
| { |
| uint64_t properties[] = { |
| /* Single context sampling */ |
| DRM_I915_PERF_PROP_CTX_HANDLE, ctx_id, |
| |
| /* Include OA reports in samples */ |
| DRM_I915_PERF_PROP_SAMPLE_OA, true, |
| |
| /* OA unit configuration */ |
| DRM_I915_PERF_PROP_OA_METRICS_SET, metrics_set_id, |
| DRM_I915_PERF_PROP_OA_FORMAT, report_format, |
| DRM_I915_PERF_PROP_OA_EXPONENT, period_exponent, |
| }; |
| struct drm_i915_perf_open_param param = { |
| .flags = I915_PERF_FLAG_FD_CLOEXEC | |
| I915_PERF_FLAG_FD_NONBLOCK | |
| I915_PERF_FLAG_DISABLED, |
| .num_properties = ARRAY_SIZE(properties) / 2, |
| .properties_ptr = (uintptr_t) properties, |
| }; |
| int fd = gen_ioctl(drm_fd, DRM_IOCTL_I915_PERF_OPEN, ¶m); |
| if (fd == -1) { |
| DBG("Error opening gen perf OA stream: %m\n"); |
| return false; |
| } |
| |
| perf_ctx->oa_stream_fd = fd; |
| |
| perf_ctx->current_oa_metrics_set_id = metrics_set_id; |
| perf_ctx->current_oa_format = report_format; |
| |
| return true; |
| } |
| |
| static uint64_t |
| get_metric_id(struct gen_perf_config *perf, |
| const struct gen_perf_query_info *query) |
| { |
| /* These queries are know not to ever change, their config ID has been |
| * loaded upon the first query creation. No need to look them up again. |
| */ |
| if (query->kind == GEN_PERF_QUERY_TYPE_OA) |
| return query->oa_metrics_set_id; |
| |
| assert(query->kind == GEN_PERF_QUERY_TYPE_RAW); |
| |
| /* Raw queries can be reprogrammed up by an external application/library. |
| * When a raw query is used for the first time it's id is set to a value != |
| * 0. When it stops being used the id returns to 0. No need to reload the |
| * ID when it's already loaded. |
| */ |
| if (query->oa_metrics_set_id != 0) { |
| DBG("Raw query '%s' guid=%s using cached ID: %"PRIu64"\n", |
| query->name, query->guid, query->oa_metrics_set_id); |
| return query->oa_metrics_set_id; |
| } |
| |
| struct gen_perf_query_info *raw_query = (struct gen_perf_query_info *)query; |
| if (!gen_perf_load_metric_id(perf, query->guid, |
| &raw_query->oa_metrics_set_id)) { |
| DBG("Unable to read query guid=%s ID, falling back to test config\n", query->guid); |
| raw_query->oa_metrics_set_id = 1ULL; |
| } else { |
| DBG("Raw query '%s'guid=%s loaded ID: %"PRIu64"\n", |
| query->name, query->guid, query->oa_metrics_set_id); |
| } |
| return query->oa_metrics_set_id; |
| } |
| |
| static struct oa_sample_buf * |
| get_free_sample_buf(struct gen_perf_context *perf_ctx) |
| { |
| struct exec_node *node = exec_list_pop_head(&perf_ctx->free_sample_buffers); |
| struct oa_sample_buf *buf; |
| |
| if (node) |
| buf = exec_node_data(struct oa_sample_buf, node, link); |
| else { |
| buf = ralloc_size(perf_ctx->perf, sizeof(*buf)); |
| |
| exec_node_init(&buf->link); |
| buf->refcount = 0; |
| } |
| buf->len = 0; |
| |
| return buf; |
| } |
| |
| static void |
| reap_old_sample_buffers(struct gen_perf_context *perf_ctx) |
| { |
| struct exec_node *tail_node = |
| exec_list_get_tail(&perf_ctx->sample_buffers); |
| struct oa_sample_buf *tail_buf = |
| exec_node_data(struct oa_sample_buf, tail_node, link); |
| |
| /* Remove all old, unreferenced sample buffers walking forward from |
| * the head of the list, except always leave at least one node in |
| * the list so we always have a node to reference when we Begin |
| * a new query. |
| */ |
| foreach_list_typed_safe(struct oa_sample_buf, buf, link, |
| &perf_ctx->sample_buffers) |
| { |
| if (buf->refcount == 0 && buf != tail_buf) { |
| exec_node_remove(&buf->link); |
| exec_list_push_head(&perf_ctx->free_sample_buffers, &buf->link); |
| } else |
| return; |
| } |
| } |
| |
| static void |
| free_sample_bufs(struct gen_perf_context *perf_ctx) |
| { |
| foreach_list_typed_safe(struct oa_sample_buf, buf, link, |
| &perf_ctx->free_sample_buffers) |
| ralloc_free(buf); |
| |
| exec_list_make_empty(&perf_ctx->free_sample_buffers); |
| } |
| |
| |
| struct gen_perf_query_object * |
| gen_perf_new_query(struct gen_perf_context *perf_ctx, unsigned query_index) |
| { |
| const struct gen_perf_query_info *query = |
| &perf_ctx->perf->queries[query_index]; |
| struct gen_perf_query_object *obj = |
| calloc(1, sizeof(struct gen_perf_query_object)); |
| |
| if (!obj) |
| return NULL; |
| |
| obj->queryinfo = query; |
| |
| perf_ctx->n_query_instances++; |
| return obj; |
| } |
| |
| int |
| gen_perf_active_queries(struct gen_perf_context *perf_ctx, |
| const struct gen_perf_query_info *query) |
| { |
| assert(perf_ctx->n_active_oa_queries == 0 || perf_ctx->n_active_pipeline_stats_queries == 0); |
| |
| switch (query->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| return perf_ctx->n_active_oa_queries; |
| break; |
| |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| return perf_ctx->n_active_pipeline_stats_queries; |
| break; |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| } |
| |
| const struct gen_perf_query_info* |
| gen_perf_query_info(const struct gen_perf_query_object *query) |
| { |
| return query->queryinfo; |
| } |
| |
| struct gen_perf_context * |
| gen_perf_new_context(void *parent) |
| { |
| struct gen_perf_context *ctx = rzalloc(parent, struct gen_perf_context); |
| if (! ctx) |
| fprintf(stderr, "%s: failed to alloc context\n", __func__); |
| return ctx; |
| } |
| |
| struct gen_perf_config * |
| gen_perf_config(struct gen_perf_context *ctx) |
| { |
| return ctx->perf; |
| } |
| |
| void |
| gen_perf_init_context(struct gen_perf_context *perf_ctx, |
| struct gen_perf_config *perf_cfg, |
| void * ctx, /* driver context (eg, brw_context) */ |
| void * bufmgr, /* eg brw_bufmgr */ |
| const struct gen_device_info *devinfo, |
| uint32_t hw_ctx, |
| int drm_fd) |
| { |
| perf_ctx->perf = perf_cfg; |
| perf_ctx->ctx = ctx; |
| perf_ctx->bufmgr = bufmgr; |
| perf_ctx->drm_fd = drm_fd; |
| perf_ctx->hw_ctx = hw_ctx; |
| perf_ctx->devinfo = devinfo; |
| |
| perf_ctx->unaccumulated = |
| ralloc_array(ctx, struct gen_perf_query_object *, 2); |
| perf_ctx->unaccumulated_elements = 0; |
| perf_ctx->unaccumulated_array_size = 2; |
| |
| exec_list_make_empty(&perf_ctx->sample_buffers); |
| exec_list_make_empty(&perf_ctx->free_sample_buffers); |
| |
| /* It's convenient to guarantee that this linked list of sample |
| * buffers is never empty so we add an empty head so when we |
| * Begin an OA query we can always take a reference on a buffer |
| * in this list. |
| */ |
| struct oa_sample_buf *buf = get_free_sample_buf(perf_ctx); |
| exec_list_push_head(&perf_ctx->sample_buffers, &buf->link); |
| |
| perf_ctx->oa_stream_fd = -1; |
| perf_ctx->next_query_start_report_id = 1000; |
| } |
| |
| /** |
| * Add a query to the global list of "unaccumulated queries." |
| * |
| * Queries are tracked here until all the associated OA reports have |
| * been accumulated via accumulate_oa_reports() after the end |
| * MI_REPORT_PERF_COUNT has landed in query->oa.bo. |
| */ |
| static void |
| add_to_unaccumulated_query_list(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *obj) |
| { |
| if (perf_ctx->unaccumulated_elements >= |
| perf_ctx->unaccumulated_array_size) |
| { |
| perf_ctx->unaccumulated_array_size *= 1.5; |
| perf_ctx->unaccumulated = |
| reralloc(perf_ctx->ctx, perf_ctx->unaccumulated, |
| struct gen_perf_query_object *, |
| perf_ctx->unaccumulated_array_size); |
| } |
| |
| perf_ctx->unaccumulated[perf_ctx->unaccumulated_elements++] = obj; |
| } |
| |
| /** |
| * Emit MI_STORE_REGISTER_MEM commands to capture all of the |
| * pipeline statistics for the performance query object. |
| */ |
| static void |
| snapshot_statistics_registers(struct gen_perf_context *ctx, |
| struct gen_perf_query_object *obj, |
| uint32_t offset_in_bytes) |
| { |
| struct gen_perf_config *perf = ctx->perf; |
| const struct gen_perf_query_info *query = obj->queryinfo; |
| const int n_counters = query->n_counters; |
| |
| for (int i = 0; i < n_counters; i++) { |
| const struct gen_perf_query_counter *counter = &query->counters[i]; |
| |
| assert(counter->data_type == GEN_PERF_COUNTER_DATA_TYPE_UINT64); |
| |
| perf->vtbl.store_register_mem(ctx->ctx, obj->pipeline_stats.bo, |
| counter->pipeline_stat.reg, 8, |
| offset_in_bytes + i * sizeof(uint64_t)); |
| } |
| } |
| |
| static void |
| snapshot_freq_register(struct gen_perf_context *ctx, |
| struct gen_perf_query_object *query, |
| uint32_t bo_offset) |
| { |
| struct gen_perf_config *perf = ctx->perf; |
| const struct gen_device_info *devinfo = ctx->devinfo; |
| |
| if (devinfo->gen == 8 && !devinfo->is_cherryview) |
| perf->vtbl.store_register_mem(ctx->ctx, query->oa.bo, GEN7_RPSTAT1, 4, bo_offset); |
| else if (devinfo->gen >= 9) |
| perf->vtbl.store_register_mem(ctx->ctx, query->oa.bo, GEN9_RPSTAT0, 4, bo_offset); |
| } |
| |
| bool |
| gen_perf_begin_query(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| const struct gen_perf_query_info *queryinfo = query->queryinfo; |
| |
| /* XXX: We have to consider that the command parser unit that parses batch |
| * buffer commands and is used to capture begin/end counter snapshots isn't |
| * implicitly synchronized with what's currently running across other GPU |
| * units (such as the EUs running shaders) that the performance counters are |
| * associated with. |
| * |
| * The intention of performance queries is to measure the work associated |
| * with commands between the begin/end delimiters and so for that to be the |
| * case we need to explicitly synchronize the parsing of commands to capture |
| * Begin/End counter snapshots with what's running across other parts of the |
| * GPU. |
| * |
| * When the command parser reaches a Begin marker it effectively needs to |
| * drain everything currently running on the GPU until the hardware is idle |
| * before capturing the first snapshot of counters - otherwise the results |
| * would also be measuring the effects of earlier commands. |
| * |
| * When the command parser reaches an End marker it needs to stall until |
| * everything currently running on the GPU has finished before capturing the |
| * end snapshot - otherwise the results won't be a complete representation |
| * of the work. |
| * |
| * To achieve this, we stall the pipeline at pixel scoreboard (prevent any |
| * additional work to be processed by the pipeline until all pixels of the |
| * previous draw has be completed). |
| * |
| * N.B. The final results are based on deltas of counters between (inside) |
| * Begin/End markers so even though the total wall clock time of the |
| * workload is stretched by larger pipeline bubbles the bubbles themselves |
| * are generally invisible to the query results. Whether that's a good or a |
| * bad thing depends on the use case. For a lower real-time impact while |
| * capturing metrics then periodic sampling may be a better choice than |
| * INTEL_performance_query. |
| * |
| * |
| * This is our Begin synchronization point to drain current work on the |
| * GPU before we capture our first counter snapshot... |
| */ |
| perf_cfg->vtbl.emit_stall_at_pixel_scoreboard(perf_ctx->ctx); |
| |
| switch (queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: { |
| |
| /* Opening an i915 perf stream implies exclusive access to the OA unit |
| * which will generate counter reports for a specific counter set with a |
| * specific layout/format so we can't begin any OA based queries that |
| * require a different counter set or format unless we get an opportunity |
| * to close the stream and open a new one... |
| */ |
| uint64_t metric_id = get_metric_id(perf_ctx->perf, queryinfo); |
| |
| if (perf_ctx->oa_stream_fd != -1 && |
| perf_ctx->current_oa_metrics_set_id != metric_id) { |
| |
| if (perf_ctx->n_oa_users != 0) { |
| DBG("WARNING: Begin failed already using perf config=%i/%"PRIu64"\n", |
| perf_ctx->current_oa_metrics_set_id, metric_id); |
| return false; |
| } else |
| gen_perf_close(perf_ctx, queryinfo); |
| } |
| |
| /* If the OA counters aren't already on, enable them. */ |
| if (perf_ctx->oa_stream_fd == -1) { |
| const struct gen_device_info *devinfo = perf_ctx->devinfo; |
| |
| /* The period_exponent gives a sampling period as follows: |
| * sample_period = timestamp_period * 2^(period_exponent + 1) |
| * |
| * The timestamps increments every 80ns (HSW), ~52ns (GEN9LP) or |
| * ~83ns (GEN8/9). |
| * |
| * The counter overflow period is derived from the EuActive counter |
| * which reads a counter that increments by the number of clock |
| * cycles multiplied by the number of EUs. It can be calculated as: |
| * |
| * 2^(number of bits in A counter) / (n_eus * max_gen_freq * 2) |
| * |
| * (E.g. 40 EUs @ 1GHz = ~53ms) |
| * |
| * We select a sampling period inferior to that overflow period to |
| * ensure we cannot see more than 1 counter overflow, otherwise we |
| * could loose information. |
| */ |
| |
| int a_counter_in_bits = 32; |
| if (devinfo->gen >= 8) |
| a_counter_in_bits = 40; |
| |
| uint64_t overflow_period = pow(2, a_counter_in_bits) / (perf_cfg->sys_vars.n_eus * |
| /* drop 1GHz freq to have units in nanoseconds */ |
| 2); |
| |
| DBG("A counter overflow period: %"PRIu64"ns, %"PRIu64"ms (n_eus=%"PRIu64")\n", |
| overflow_period, overflow_period / 1000000ul, perf_cfg->sys_vars.n_eus); |
| |
| int period_exponent = 0; |
| uint64_t prev_sample_period, next_sample_period; |
| for (int e = 0; e < 30; e++) { |
| prev_sample_period = 1000000000ull * pow(2, e + 1) / devinfo->timestamp_frequency; |
| next_sample_period = 1000000000ull * pow(2, e + 2) / devinfo->timestamp_frequency; |
| |
| /* Take the previous sampling period, lower than the overflow |
| * period. |
| */ |
| if (prev_sample_period < overflow_period && |
| next_sample_period > overflow_period) |
| period_exponent = e + 1; |
| } |
| |
| if (period_exponent == 0) { |
| DBG("WARNING: enable to find a sampling exponent\n"); |
| return false; |
| } |
| |
| DBG("OA sampling exponent: %i ~= %"PRIu64"ms\n", period_exponent, |
| prev_sample_period / 1000000ul); |
| |
| if (!gen_perf_open(perf_ctx, metric_id, queryinfo->oa_format, |
| period_exponent, perf_ctx->drm_fd, |
| perf_ctx->hw_ctx)) |
| return false; |
| } else { |
| assert(perf_ctx->current_oa_metrics_set_id == metric_id && |
| perf_ctx->current_oa_format == queryinfo->oa_format); |
| } |
| |
| if (!inc_n_users(perf_ctx)) { |
| DBG("WARNING: Error enabling i915 perf stream: %m\n"); |
| return false; |
| } |
| |
| if (query->oa.bo) { |
| perf_cfg->vtbl.bo_unreference(query->oa.bo); |
| query->oa.bo = NULL; |
| } |
| |
| query->oa.bo = perf_cfg->vtbl.bo_alloc(perf_ctx->bufmgr, |
| "perf. query OA MI_RPC bo", |
| MI_RPC_BO_SIZE); |
| #ifdef DEBUG |
| /* Pre-filling the BO helps debug whether writes landed. */ |
| void *map = perf_cfg->vtbl.bo_map(perf_ctx->ctx, query->oa.bo, MAP_WRITE); |
| memset(map, 0x80, MI_RPC_BO_SIZE); |
| perf_cfg->vtbl.bo_unmap(query->oa.bo); |
| #endif |
| |
| query->oa.begin_report_id = perf_ctx->next_query_start_report_id; |
| perf_ctx->next_query_start_report_id += 2; |
| |
| /* Take a starting OA counter snapshot. */ |
| perf_cfg->vtbl.emit_mi_report_perf_count(perf_ctx->ctx, query->oa.bo, 0, |
| query->oa.begin_report_id); |
| snapshot_freq_register(perf_ctx, query, MI_FREQ_START_OFFSET_BYTES); |
| |
| ++perf_ctx->n_active_oa_queries; |
| |
| /* No already-buffered samples can possibly be associated with this query |
| * so create a marker within the list of sample buffers enabling us to |
| * easily ignore earlier samples when processing this query after |
| * completion. |
| */ |
| assert(!exec_list_is_empty(&perf_ctx->sample_buffers)); |
| query->oa.samples_head = exec_list_get_tail(&perf_ctx->sample_buffers); |
| |
| struct oa_sample_buf *buf = |
| exec_node_data(struct oa_sample_buf, query->oa.samples_head, link); |
| |
| /* This reference will ensure that future/following sample |
| * buffers (that may relate to this query) can't be freed until |
| * this drops to zero. |
| */ |
| buf->refcount++; |
| |
| gen_perf_query_result_clear(&query->oa.result); |
| query->oa.results_accumulated = false; |
| |
| add_to_unaccumulated_query_list(perf_ctx, query); |
| break; |
| } |
| |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| if (query->pipeline_stats.bo) { |
| perf_cfg->vtbl.bo_unreference(query->pipeline_stats.bo); |
| query->pipeline_stats.bo = NULL; |
| } |
| |
| query->pipeline_stats.bo = |
| perf_cfg->vtbl.bo_alloc(perf_ctx->bufmgr, |
| "perf. query pipeline stats bo", |
| STATS_BO_SIZE); |
| |
| /* Take starting snapshots. */ |
| snapshot_statistics_registers(perf_ctx, query, 0); |
| |
| ++perf_ctx->n_active_pipeline_stats_queries; |
| break; |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| |
| return true; |
| } |
| |
| void |
| gen_perf_end_query(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| |
| /* Ensure that the work associated with the queried commands will have |
| * finished before taking our query end counter readings. |
| * |
| * For more details see comment in brw_begin_perf_query for |
| * corresponding flush. |
| */ |
| perf_cfg->vtbl.emit_stall_at_pixel_scoreboard(perf_ctx->ctx); |
| |
| switch (query->queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| |
| /* NB: It's possible that the query will have already been marked |
| * as 'accumulated' if an error was seen while reading samples |
| * from perf. In this case we mustn't try and emit a closing |
| * MI_RPC command in case the OA unit has already been disabled |
| */ |
| if (!query->oa.results_accumulated) { |
| /* Take an ending OA counter snapshot. */ |
| snapshot_freq_register(perf_ctx, query, MI_FREQ_END_OFFSET_BYTES); |
| perf_cfg->vtbl.emit_mi_report_perf_count(perf_ctx->ctx, query->oa.bo, |
| MI_RPC_BO_END_OFFSET_BYTES, |
| query->oa.begin_report_id + 1); |
| } |
| |
| --perf_ctx->n_active_oa_queries; |
| |
| /* NB: even though the query has now ended, it can't be accumulated |
| * until the end MI_REPORT_PERF_COUNT snapshot has been written |
| * to query->oa.bo |
| */ |
| break; |
| |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| snapshot_statistics_registers(perf_ctx, query, |
| STATS_BO_END_OFFSET_BYTES); |
| --perf_ctx->n_active_pipeline_stats_queries; |
| break; |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| } |
| |
| enum OaReadStatus { |
| OA_READ_STATUS_ERROR, |
| OA_READ_STATUS_UNFINISHED, |
| OA_READ_STATUS_FINISHED, |
| }; |
| |
| static enum OaReadStatus |
| read_oa_samples_until(struct gen_perf_context *perf_ctx, |
| uint32_t start_timestamp, |
| uint32_t end_timestamp) |
| { |
| struct exec_node *tail_node = |
| exec_list_get_tail(&perf_ctx->sample_buffers); |
| struct oa_sample_buf *tail_buf = |
| exec_node_data(struct oa_sample_buf, tail_node, link); |
| uint32_t last_timestamp = |
| tail_buf->len == 0 ? start_timestamp : tail_buf->last_timestamp; |
| |
| while (1) { |
| struct oa_sample_buf *buf = get_free_sample_buf(perf_ctx); |
| uint32_t offset; |
| int len; |
| |
| while ((len = read(perf_ctx->oa_stream_fd, buf->buf, |
| sizeof(buf->buf))) < 0 && errno == EINTR) |
| ; |
| |
| if (len <= 0) { |
| exec_list_push_tail(&perf_ctx->free_sample_buffers, &buf->link); |
| |
| if (len < 0) { |
| if (errno == EAGAIN) { |
| return ((last_timestamp - start_timestamp) < INT32_MAX && |
| (last_timestamp - start_timestamp) >= |
| (end_timestamp - start_timestamp)) ? |
| OA_READ_STATUS_FINISHED : |
| OA_READ_STATUS_UNFINISHED; |
| } else { |
| DBG("Error reading i915 perf samples: %m\n"); |
| } |
| } else |
| DBG("Spurious EOF reading i915 perf samples\n"); |
| |
| return OA_READ_STATUS_ERROR; |
| } |
| |
| buf->len = len; |
| exec_list_push_tail(&perf_ctx->sample_buffers, &buf->link); |
| |
| /* Go through the reports and update the last timestamp. */ |
| offset = 0; |
| while (offset < buf->len) { |
| const struct drm_i915_perf_record_header *header = |
| (const struct drm_i915_perf_record_header *) &buf->buf[offset]; |
| uint32_t *report = (uint32_t *) (header + 1); |
| |
| if (header->type == DRM_I915_PERF_RECORD_SAMPLE) |
| last_timestamp = report[1]; |
| |
| offset += header->size; |
| } |
| |
| buf->last_timestamp = last_timestamp; |
| } |
| |
| unreachable("not reached"); |
| return OA_READ_STATUS_ERROR; |
| } |
| |
| /** |
| * Try to read all the reports until either the delimiting timestamp |
| * or an error arises. |
| */ |
| static bool |
| read_oa_samples_for_query(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query, |
| void *current_batch) |
| { |
| uint32_t *start; |
| uint32_t *last; |
| uint32_t *end; |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| |
| /* We need the MI_REPORT_PERF_COUNT to land before we can start |
| * accumulate. */ |
| assert(!perf_cfg->vtbl.batch_references(current_batch, query->oa.bo) && |
| !perf_cfg->vtbl.bo_busy(query->oa.bo)); |
| |
| /* Map the BO once here and let accumulate_oa_reports() unmap |
| * it. */ |
| if (query->oa.map == NULL) |
| query->oa.map = perf_cfg->vtbl.bo_map(perf_ctx->ctx, query->oa.bo, MAP_READ); |
| |
| start = last = query->oa.map; |
| end = query->oa.map + MI_RPC_BO_END_OFFSET_BYTES; |
| |
| if (start[0] != query->oa.begin_report_id) { |
| DBG("Spurious start report id=%"PRIu32"\n", start[0]); |
| return true; |
| } |
| if (end[0] != (query->oa.begin_report_id + 1)) { |
| DBG("Spurious end report id=%"PRIu32"\n", end[0]); |
| return true; |
| } |
| |
| /* Read the reports until the end timestamp. */ |
| switch (read_oa_samples_until(perf_ctx, start[1], end[1])) { |
| case OA_READ_STATUS_ERROR: |
| /* Fallthrough and let accumulate_oa_reports() deal with the |
| * error. */ |
| case OA_READ_STATUS_FINISHED: |
| return true; |
| case OA_READ_STATUS_UNFINISHED: |
| return false; |
| } |
| |
| unreachable("invalid read status"); |
| return false; |
| } |
| |
| void |
| gen_perf_wait_query(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query, |
| void *current_batch) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| struct brw_bo *bo = NULL; |
| |
| switch (query->queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| bo = query->oa.bo; |
| break; |
| |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| bo = query->pipeline_stats.bo; |
| break; |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| |
| if (bo == NULL) |
| return; |
| |
| /* If the current batch references our results bo then we need to |
| * flush first... |
| */ |
| if (perf_cfg->vtbl.batch_references(current_batch, bo)) |
| perf_cfg->vtbl.batchbuffer_flush(perf_ctx->ctx, __FILE__, __LINE__); |
| |
| perf_cfg->vtbl.bo_wait_rendering(bo); |
| |
| /* Due to a race condition between the OA unit signaling report |
| * availability and the report actually being written into memory, |
| * we need to wait for all the reports to come in before we can |
| * read them. |
| */ |
| if (query->queryinfo->kind == GEN_PERF_QUERY_TYPE_OA || |
| query->queryinfo->kind == GEN_PERF_QUERY_TYPE_RAW) { |
| while (!read_oa_samples_for_query(perf_ctx, query, current_batch)) |
| ; |
| } |
| } |
| |
| bool |
| gen_perf_is_query_ready(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query, |
| void *current_batch) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| |
| switch (query->queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| return (query->oa.results_accumulated || |
| (query->oa.bo && |
| !perf_cfg->vtbl.batch_references(current_batch, query->oa.bo) && |
| !perf_cfg->vtbl.bo_busy(query->oa.bo) && |
| read_oa_samples_for_query(perf_ctx, query, current_batch))); |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| return (query->pipeline_stats.bo && |
| !perf_cfg->vtbl.batch_references(current_batch, query->pipeline_stats.bo) && |
| !perf_cfg->vtbl.bo_busy(query->pipeline_stats.bo)); |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Remove a query from the global list of unaccumulated queries once |
| * after successfully accumulating the OA reports associated with the |
| * query in accumulate_oa_reports() or when discarding unwanted query |
| * results. |
| */ |
| static void |
| drop_from_unaccumulated_query_list(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query) |
| { |
| for (int i = 0; i < perf_ctx->unaccumulated_elements; i++) { |
| if (perf_ctx->unaccumulated[i] == query) { |
| int last_elt = --perf_ctx->unaccumulated_elements; |
| |
| if (i == last_elt) |
| perf_ctx->unaccumulated[i] = NULL; |
| else { |
| perf_ctx->unaccumulated[i] = |
| perf_ctx->unaccumulated[last_elt]; |
| } |
| |
| break; |
| } |
| } |
| |
| /* Drop our samples_head reference so that associated periodic |
| * sample data buffers can potentially be reaped if they aren't |
| * referenced by any other queries... |
| */ |
| |
| struct oa_sample_buf *buf = |
| exec_node_data(struct oa_sample_buf, query->oa.samples_head, link); |
| |
| assert(buf->refcount > 0); |
| buf->refcount--; |
| |
| query->oa.samples_head = NULL; |
| |
| reap_old_sample_buffers(perf_ctx); |
| } |
| |
| /* In general if we see anything spurious while accumulating results, |
| * we don't try and continue accumulating the current query, hoping |
| * for the best, we scrap anything outstanding, and then hope for the |
| * best with new queries. |
| */ |
| static void |
| discard_all_queries(struct gen_perf_context *perf_ctx) |
| { |
| while (perf_ctx->unaccumulated_elements) { |
| struct gen_perf_query_object *query = perf_ctx->unaccumulated[0]; |
| |
| query->oa.results_accumulated = true; |
| drop_from_unaccumulated_query_list(perf_ctx, query); |
| |
| dec_n_users(perf_ctx); |
| } |
| } |
| |
| /* Looks for the validity bit of context ID (dword 2) of an OA report. */ |
| static bool |
| oa_report_ctx_id_valid(const struct gen_device_info *devinfo, |
| const uint32_t *report) |
| { |
| assert(devinfo->gen >= 8); |
| if (devinfo->gen == 8) |
| return (report[0] & (1 << 25)) != 0; |
| return (report[0] & (1 << 16)) != 0; |
| } |
| |
| /** |
| * Accumulate raw OA counter values based on deltas between pairs of |
| * OA reports. |
| * |
| * Accumulation starts from the first report captured via |
| * MI_REPORT_PERF_COUNT (MI_RPC) by brw_begin_perf_query() until the |
| * last MI_RPC report requested by brw_end_perf_query(). Between these |
| * two reports there may also some number of periodically sampled OA |
| * reports collected via the i915 perf interface - depending on the |
| * duration of the query. |
| * |
| * These periodic snapshots help to ensure we handle counter overflow |
| * correctly by being frequent enough to ensure we don't miss multiple |
| * overflows of a counter between snapshots. For Gen8+ the i915 perf |
| * snapshots provide the extra context-switch reports that let us |
| * subtract out the progress of counters associated with other |
| * contexts running on the system. |
| */ |
| static void |
| accumulate_oa_reports(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query) |
| { |
| const struct gen_device_info *devinfo = perf_ctx->devinfo; |
| uint32_t *start; |
| uint32_t *last; |
| uint32_t *end; |
| struct exec_node *first_samples_node; |
| bool last_report_ctx_match = true; |
| int out_duration = 0; |
| |
| assert(query->oa.map != NULL); |
| |
| start = last = query->oa.map; |
| end = query->oa.map + MI_RPC_BO_END_OFFSET_BYTES; |
| |
| if (start[0] != query->oa.begin_report_id) { |
| DBG("Spurious start report id=%"PRIu32"\n", start[0]); |
| goto error; |
| } |
| if (end[0] != (query->oa.begin_report_id + 1)) { |
| DBG("Spurious end report id=%"PRIu32"\n", end[0]); |
| goto error; |
| } |
| |
| /* On Gen12+ OA reports are sourced from per context counters, so we don't |
| * ever have to look at the global OA buffer. Yey \o/ |
| */ |
| if (perf_ctx->devinfo->gen >= 12) { |
| last = start; |
| goto end; |
| } |
| |
| /* See if we have any periodic reports to accumulate too... */ |
| |
| /* N.B. The oa.samples_head was set when the query began and |
| * pointed to the tail of the perf_ctx->sample_buffers list at |
| * the time the query started. Since the buffer existed before the |
| * first MI_REPORT_PERF_COUNT command was emitted we therefore know |
| * that no data in this particular node's buffer can possibly be |
| * associated with the query - so skip ahead one... |
| */ |
| first_samples_node = query->oa.samples_head->next; |
| |
| foreach_list_typed_from(struct oa_sample_buf, buf, link, |
| &perf_ctx->sample_buffers, |
| first_samples_node) |
| { |
| int offset = 0; |
| |
| while (offset < buf->len) { |
| const struct drm_i915_perf_record_header *header = |
| (const struct drm_i915_perf_record_header *)(buf->buf + offset); |
| |
| assert(header->size != 0); |
| assert(header->size <= buf->len); |
| |
| offset += header->size; |
| |
| switch (header->type) { |
| case DRM_I915_PERF_RECORD_SAMPLE: { |
| uint32_t *report = (uint32_t *)(header + 1); |
| bool report_ctx_match = true; |
| bool add = true; |
| |
| /* Ignore reports that come before the start marker. |
| * (Note: takes care to allow overflow of 32bit timestamps) |
| */ |
| if (gen_device_info_timebase_scale(devinfo, |
| report[1] - start[1]) > 5000000000) { |
| continue; |
| } |
| |
| /* Ignore reports that come after the end marker. |
| * (Note: takes care to allow overflow of 32bit timestamps) |
| */ |
| if (gen_device_info_timebase_scale(devinfo, |
| report[1] - end[1]) <= 5000000000) { |
| goto end; |
| } |
| |
| /* For Gen8+ since the counters continue while other |
| * contexts are running we need to discount any unrelated |
| * deltas. The hardware automatically generates a report |
| * on context switch which gives us a new reference point |
| * to continuing adding deltas from. |
| * |
| * For Haswell we can rely on the HW to stop the progress |
| * of OA counters while any other context is acctive. |
| */ |
| if (devinfo->gen >= 8) { |
| /* Consider that the current report matches our context only if |
| * the report says the report ID is valid. |
| */ |
| report_ctx_match = oa_report_ctx_id_valid(devinfo, report) && |
| report[2] == start[2]; |
| if (report_ctx_match) |
| out_duration = 0; |
| else |
| out_duration++; |
| |
| /* Only add the delta between <last, report> if the last report |
| * was clearly identified as our context, or if we have at most |
| * 1 report without a matching ID. |
| * |
| * The OA unit will sometimes label reports with an invalid |
| * context ID when i915 rewrites the execlist submit register |
| * with the same context as the one currently running. This |
| * happens when i915 wants to notify the HW of ringbuffer tail |
| * register update. We have to consider this report as part of |
| * our context as the 3d pipeline behind the OACS unit is still |
| * processing the operations started at the previous execlist |
| * submission. |
| */ |
| add = last_report_ctx_match && out_duration < 2; |
| } |
| |
| if (add) { |
| gen_perf_query_result_accumulate(&query->oa.result, |
| query->queryinfo, |
| last, report); |
| } else { |
| /* We're not adding the delta because we've identified it's not |
| * for the context we filter for. We can consider that the |
| * query was split. |
| */ |
| query->oa.result.query_disjoint = true; |
| } |
| |
| last = report; |
| last_report_ctx_match = report_ctx_match; |
| |
| break; |
| } |
| |
| case DRM_I915_PERF_RECORD_OA_BUFFER_LOST: |
| DBG("i915 perf: OA error: all reports lost\n"); |
| goto error; |
| case DRM_I915_PERF_RECORD_OA_REPORT_LOST: |
| DBG("i915 perf: OA report lost\n"); |
| break; |
| } |
| } |
| } |
| |
| end: |
| |
| gen_perf_query_result_accumulate(&query->oa.result, query->queryinfo, |
| last, end); |
| |
| query->oa.results_accumulated = true; |
| drop_from_unaccumulated_query_list(perf_ctx, query); |
| dec_n_users(perf_ctx); |
| |
| return; |
| |
| error: |
| |
| discard_all_queries(perf_ctx); |
| } |
| |
| void |
| gen_perf_delete_query(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| |
| /* We can assume that the frontend waits for a query to complete |
| * before ever calling into here, so we don't have to worry about |
| * deleting an in-flight query object. |
| */ |
| switch (query->queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| if (query->oa.bo) { |
| if (!query->oa.results_accumulated) { |
| drop_from_unaccumulated_query_list(perf_ctx, query); |
| dec_n_users(perf_ctx); |
| } |
| |
| perf_cfg->vtbl.bo_unreference(query->oa.bo); |
| query->oa.bo = NULL; |
| } |
| |
| query->oa.results_accumulated = false; |
| break; |
| |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| if (query->pipeline_stats.bo) { |
| perf_cfg->vtbl.bo_unreference(query->pipeline_stats.bo); |
| query->pipeline_stats.bo = NULL; |
| } |
| break; |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| |
| /* As an indication that the INTEL_performance_query extension is no |
| * longer in use, it's a good time to free our cache of sample |
| * buffers and close any current i915-perf stream. |
| */ |
| if (--perf_ctx->n_query_instances == 0) { |
| free_sample_bufs(perf_ctx); |
| gen_perf_close(perf_ctx, query->queryinfo); |
| } |
| |
| free(query); |
| } |
| |
| #define GET_FIELD(word, field) (((word) & field ## _MASK) >> field ## _SHIFT) |
| |
| static void |
| read_gt_frequency(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *obj) |
| { |
| const struct gen_device_info *devinfo = perf_ctx->devinfo; |
| uint32_t start = *((uint32_t *)(obj->oa.map + MI_FREQ_START_OFFSET_BYTES)), |
| end = *((uint32_t *)(obj->oa.map + MI_FREQ_END_OFFSET_BYTES)); |
| |
| switch (devinfo->gen) { |
| case 7: |
| case 8: |
| obj->oa.gt_frequency[0] = GET_FIELD(start, GEN7_RPSTAT1_CURR_GT_FREQ) * 50ULL; |
| obj->oa.gt_frequency[1] = GET_FIELD(end, GEN7_RPSTAT1_CURR_GT_FREQ) * 50ULL; |
| break; |
| case 9: |
| case 10: |
| case 11: |
| case 12: |
| obj->oa.gt_frequency[0] = GET_FIELD(start, GEN9_RPSTAT0_CURR_GT_FREQ) * 50ULL / 3ULL; |
| obj->oa.gt_frequency[1] = GET_FIELD(end, GEN9_RPSTAT0_CURR_GT_FREQ) * 50ULL / 3ULL; |
| break; |
| default: |
| unreachable("unexpected gen"); |
| } |
| |
| /* Put the numbers into Hz. */ |
| obj->oa.gt_frequency[0] *= 1000000ULL; |
| obj->oa.gt_frequency[1] *= 1000000ULL; |
| } |
| |
| static int |
| get_oa_counter_data(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query, |
| size_t data_size, |
| uint8_t *data) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| const struct gen_perf_query_info *queryinfo = query->queryinfo; |
| int n_counters = queryinfo->n_counters; |
| int written = 0; |
| |
| for (int i = 0; i < n_counters; i++) { |
| const struct gen_perf_query_counter *counter = &queryinfo->counters[i]; |
| uint64_t *out_uint64; |
| float *out_float; |
| size_t counter_size = gen_perf_query_counter_get_size(counter); |
| |
| if (counter_size) { |
| switch (counter->data_type) { |
| case GEN_PERF_COUNTER_DATA_TYPE_UINT64: |
| out_uint64 = (uint64_t *)(data + counter->offset); |
| *out_uint64 = |
| counter->oa_counter_read_uint64(perf_cfg, queryinfo, |
| query->oa.result.accumulator); |
| break; |
| case GEN_PERF_COUNTER_DATA_TYPE_FLOAT: |
| out_float = (float *)(data + counter->offset); |
| *out_float = |
| counter->oa_counter_read_float(perf_cfg, queryinfo, |
| query->oa.result.accumulator); |
| break; |
| default: |
| /* So far we aren't using uint32, double or bool32... */ |
| unreachable("unexpected counter data type"); |
| } |
| written = counter->offset + counter_size; |
| } |
| } |
| |
| return written; |
| } |
| |
| static int |
| get_pipeline_stats_data(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query, |
| size_t data_size, |
| uint8_t *data) |
| |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| const struct gen_perf_query_info *queryinfo = query->queryinfo; |
| int n_counters = queryinfo->n_counters; |
| uint8_t *p = data; |
| |
| uint64_t *start = perf_cfg->vtbl.bo_map(perf_ctx->ctx, query->pipeline_stats.bo, MAP_READ); |
| uint64_t *end = start + (STATS_BO_END_OFFSET_BYTES / sizeof(uint64_t)); |
| |
| for (int i = 0; i < n_counters; i++) { |
| const struct gen_perf_query_counter *counter = &queryinfo->counters[i]; |
| uint64_t value = end[i] - start[i]; |
| |
| if (counter->pipeline_stat.numerator != |
| counter->pipeline_stat.denominator) { |
| value *= counter->pipeline_stat.numerator; |
| value /= counter->pipeline_stat.denominator; |
| } |
| |
| *((uint64_t *)p) = value; |
| p += 8; |
| } |
| |
| perf_cfg->vtbl.bo_unmap(query->pipeline_stats.bo); |
| |
| return p - data; |
| } |
| |
| void |
| gen_perf_get_query_data(struct gen_perf_context *perf_ctx, |
| struct gen_perf_query_object *query, |
| int data_size, |
| unsigned *data, |
| unsigned *bytes_written) |
| { |
| struct gen_perf_config *perf_cfg = perf_ctx->perf; |
| int written = 0; |
| |
| switch (query->queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| if (!query->oa.results_accumulated) { |
| read_gt_frequency(perf_ctx, query); |
| uint32_t *begin_report = query->oa.map; |
| uint32_t *end_report = query->oa.map + MI_RPC_BO_END_OFFSET_BYTES; |
| gen_perf_query_result_read_frequencies(&query->oa.result, |
| perf_ctx->devinfo, |
| begin_report, |
| end_report); |
| accumulate_oa_reports(perf_ctx, query); |
| assert(query->oa.results_accumulated); |
| |
| perf_cfg->vtbl.bo_unmap(query->oa.bo); |
| query->oa.map = NULL; |
| } |
| if (query->queryinfo->kind == GEN_PERF_QUERY_TYPE_OA) { |
| written = get_oa_counter_data(perf_ctx, query, data_size, (uint8_t *)data); |
| } else { |
| const struct gen_device_info *devinfo = perf_ctx->devinfo; |
| |
| written = gen_perf_query_result_write_mdapi((uint8_t *)data, data_size, |
| devinfo, &query->oa.result, |
| query->oa.gt_frequency[0], |
| query->oa.gt_frequency[1]); |
| } |
| break; |
| |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| written = get_pipeline_stats_data(perf_ctx, query, data_size, (uint8_t *)data); |
| break; |
| |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| |
| if (bytes_written) |
| *bytes_written = written; |
| } |
| |
| void |
| gen_perf_dump_query_count(struct gen_perf_context *perf_ctx) |
| { |
| DBG("Queries: (Open queries = %d, OA users = %d)\n", |
| perf_ctx->n_active_oa_queries, perf_ctx->n_oa_users); |
| } |
| |
| void |
| gen_perf_dump_query(struct gen_perf_context *ctx, |
| struct gen_perf_query_object *obj, |
| void *current_batch) |
| { |
| switch (obj->queryinfo->kind) { |
| case GEN_PERF_QUERY_TYPE_OA: |
| case GEN_PERF_QUERY_TYPE_RAW: |
| DBG("BO: %-4s OA data: %-10s %-15s\n", |
| obj->oa.bo ? "yes," : "no,", |
| gen_perf_is_query_ready(ctx, obj, current_batch) ? "ready," : "not ready,", |
| obj->oa.results_accumulated ? "accumulated" : "not accumulated"); |
| break; |
| case GEN_PERF_QUERY_TYPE_PIPELINE: |
| DBG("BO: %-4s\n", |
| obj->pipeline_stats.bo ? "yes" : "no"); |
| break; |
| default: |
| unreachable("Unknown query type"); |
| break; |
| } |
| } |