b4d81147d8
This change does everything necessary to make the memory allocator and the scavenger respect the memory limit. In particular, it: - Adds a second goal for the background scavenge that's based on the memory limit, setting a target 5% below the limit to make sure it's working hard when the application is close to it. - Makes span allocation assist the scavenger if the next allocation is about to put total memory use above the memory limit. - Measures any scavenge assist time and adds it to GC assist time for the sake of GC CPU limiting, to avoid a death spiral as a result of scavenging too much. All of these changes have a relatively small impact, but each is intimately related and thus benefit from being done together. For #48409. Change-Id: I35517a752f74dd12a151dd620f102c77e095d3e8 Reviewed-on: https://go-review.googlesource.com/c/go/+/397017 Reviewed-by: Michael Pratt <mpratt@google.com> Run-TryBot: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> |
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