[roll] Roll fuchsia [component_manager] Publish started and stopped durations for escrowing components
Adds the following inspect nodes and properties:
<component_manager>:root/escrow/started_durations/histogram:MONIKER
Exponential histogram of how long a component remained started, logged
at next stop. Buckets in terms of seconds:
[4, 7, 10, 16, 28, 52, 100, 196, 388, 772, 1540, 3076, 6148].
Exponential histogram is used to cover a large range of durations.
If we see numbers at the top end of the buckets then that indicates
some component is unable to stop itself over two hours.
<component_manager>:root/escrow/stopped_durations/histogram:MONIKER
Linear histogram of how long a component remained stopped, logged at
next start. Buckets in terms of seconds:
[10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ..., 250].
Linear histogram is used to detect thrashing. If we see numbers at
the lower one or two buckets then that indicates thrashing. For
http-client the expectation is most stop durations should be above
250s unless programs are constantly crashing and filing reports.
To save resources we only do this for components that opt into escrow.
The histogram array in inspect also won't include buckets that have zero
values in them, so this should be reasonably efficient.
TEST: manually ran `ffx inspect show '<component_manager>:root/escrow'`
in a product where we stop http-client and observe histograms. Get
output such as:
root:
escrow:
started_durations:
histogram:
core/network/http-client:
type = exponential
size = 14
buckets = [[28,52)=2, [772,1540)=1]
Original-Bug: b/333078100
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1031553
Original-Revision: bb1472112bac003efa9e8bf4528eb1465782c9c2
GitOrigin-RevId: 52e42efc7f707b07d37c207b720c9bbab0358892
Change-Id: I9104266e04f5d78b43cdc2ee43c90e3eb2fcaad6
diff --git a/stem b/stem
index c5cc8c8..ae8d4bc 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
githooks="integration/git-hooks"
remote="https://fuchsia.googlesource.com/fuchsia"
gerrithost="https://fuchsia-review.googlesource.com"
- revision="9ef49b1b8021fc5dc2610f11c9d6a30409e3a601"/>
+ revision="bb1472112bac003efa9e8bf4528eb1465782c9c2"/>
</projects>
<hooks>
<hook name="install-environment"
