tree c5b72dfde30a0ae1de2bb19c86157e521aca72f1
parent 3c2ef28caa5205f4b4d319667686213b6c4080ad
author Taylor Cramer <cramertj@google.com> 1711997504 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1711997504 +0000

pw_multibuf: Replace Mutex with ISL

Per-region mutexes have size overhead that is much larger than
affordable for individual chunk regions. Prior to this change,
SimpleAllocator's LinkedRegionTracker was 144 bytes (!) when compiled
for host. After this change, it is 48 bytes (which is still too large,
but now the size can be reasonably improved by reducing the number of
pointer and size pairs).

Change-Id: Iae5b3e277d649b613f1b12be911464657e8890bf
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/200996
Pigweed-Auto-Submit: Taylor Cramer <cramertj@google.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Reviewed-by: Alexei Frolov <frolv@google.com>