[roll] Roll fuchsia [superproject] Roll scudo [scudo][standalone] Precommit pages

On Fuchsia, this CL changes garbage collection
to precommit all pages if the |Buffer| doesn't
fit into the static buffer size.

A test program (scudotest) was used that deliberately
grows a size class high water mark to the point where
the pre-allocated static buffer is no longer used for
garbage collection.

Traces showed that precommiting the Vmar removes ~30 page faults
and ~.22ms of wall time.*

Before: https://ui.perfetto.dev/#!/?s=7da19fc3f59448eef51fd6fd03283bb87b702cf1a565bcbe6c9c28371671
After: https://ui.perfetto.dev/#!/?s=97707cd99b2c9efd1e6569b2deb97e3d16f8be532c59a0cc12463c37fbb1d8

*: Use the added `zx_vmar_op_range` as a reference point to observe
the differences.

For more context, see https://fxbug.dev/115594.

Reviewed By: Chia-hungDuan

Differential Revision: https://reviews.llvm.org/D140320

GitOrigin-RevId: ef65af0bf7a9a5891c2557df4a540baa1a2c5589
Original-Revision: 8002cef14ac71f29cac5595fdbfb6f75a7792aac
Roller-URL: https://ci.chromium.org/b/8794231329364572993
CQ-Do-Not-Cancel-Tryjobs: true
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/780449
Original-Revision: 331174d338af128a6b9d09514b1b6dc3fe8770cb
Change-Id: I5905ad8e38e9590af7acac9defc9a38291001b88
1 file changed
tree: e63c897ea81702f900d868c65a701e1f68d44bff
  1. git-hooks/
  2. infra/
  3. third_party/
  4. cts
  5. firmware
  6. flower
  7. jiri.lock
  8. minimal
  9. prebuilts
  10. README.md
  11. stem
  12. test_durations
  13. toolchain
README.md

Integration

This repository contains Fuchsia's Global Integration manifest files.

Making changes

All changes should be made to the internal version of this repository. Our infrastructure automatically updates this version when the internal one changes.

Currently all changes must be made by a Google employee. Non-Google employees wishing to make a change can ask for assistance via the IRC channel #fuchsia on Freenode.

Obtaining the source

First install Jiri.

Next run:

$ jiri init
$ jiri import minimal https://fuchsia.googlesource.com/integration
$ jiri update

Third party

Third party projects should have their own subdirectory in ./third_party.