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runtime: break down memstats.gc_sys

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This change breaks apart gc_sys into three distinct pieces. Two of those
pieces are pieces which come from heap_sys since they're allocated from
the page heap. The rest comes from memory mapped from e.g.
persistentalloc which better fits the purpose of a sysMemStat. Also,
rename gc_sys to gcMiscSys.

Change-Id: I098789170052511e7b31edbcdc9a53e5c24573f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/246973
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
This commit is contained in:
Michael Anthony Knyszek 2020-08-03 19:23:30 +00:00 • committed by Michael Knyszek
parent 39e335ac06
commit ad863ba32a
7 changed files with 39 additions and 27 deletions
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6
src/runtime/malloc.go
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@ -743,9 +743,9 @@ mapped:
throw("arena already initialized")
}
var r *heapArena
r = (*heapArena)(h.heapArenaAlloc.alloc(unsafe.Sizeof(*r), sys.PtrSize, &memstats.gc_sys))
r = (*heapArena)(h.heapArenaAlloc.alloc(unsafe.Sizeof(*r), sys.PtrSize, &memstats.gcMiscSys))
if r == nil {
r = (*heapArena)(persistentalloc(unsafe.Sizeof(*r), sys.PtrSize, &memstats.gc_sys))
r = (*heapArena)(persistentalloc(unsafe.Sizeof(*r), sys.PtrSize, &memstats.gcMiscSys))
if r == nil {
throw("out of memory allocating heap arena metadata")
}
@ -757,7 +757,7 @@ mapped:
if size == 0 {
size = physPageSize
}
newArray := (*notInHeap)(persistentalloc(size, sys.PtrSize, &memstats.gc_sys))
newArray := (*notInHeap)(persistentalloc(size, sys.PtrSize, &memstats.gcMiscSys))
if newArray == nil {
throw("out of memory allocating allArenas")
}