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4 Commits

Author SHA1 Message Date
Josh Bleecher Snyder 94fb42d4b2 all: use testingutil.MinAllocsPerRun 
There are a few remaining uses of testing.AllocsPerRun:
Two in which we only log the number of allocations,
and one in which dynamically calculate the allocations
target based on a different AllocsPerRun run.

This also allows us to tighten the "no allocs"
test in wgengine/filter.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-10-28 12:48:37 -07:00
Brad Fitzpatrick d1cb7a2639 metrics: use SYS_OPENAT 
New systems like arm64 don't even have SYS_OPEN.
 2021-09-02 15:28:19 -07:00
Brad Fitzpatrick 99a1c74a6a metrics: optimize CurrentFDs to not allocate on Linux 
It was 50% of our allocs on one of our servers. (!!)

Updates #2784

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-09-02 13:28:39 -07:00
Brad Fitzpatrick fc160f80ee metrics: move currentFDs code to the metrics package 
Updates #2784

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-09-02 11:14:14 -07:00