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runtime: print scavenger details when forced with debug.FreeOSMemory

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Fixes #5900.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12669043
This commit is contained in:
Dmitriy Vyukov 2013-08-08 21:55:04 +04:00
parent 1f4d58ad5d
commit 9f46efce52
1 changed files with 13 additions and 15 deletions
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28
src/pkg/runtime/mheap.c
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@ -412,8 +412,8 @@ scavengelist(MSpan *list, uint64 now, uint64 limit)
return sumreleased;
}
static uintptr
scavenge(uint64 now, uint64 limit)
static void
scavenge(int32 k, uint64 now, uint64 limit)
{
uint32 i;
uintptr sumreleased;
@ -424,7 +424,14 @@ scavenge(uint64 now, uint64 limit)
for(i=0; i < nelem(h->free); i++)
sumreleased += scavengelist(&h->free[i], now, limit);
sumreleased += scavengelist(&h->large, now, limit);
return sumreleased;
if(runtime·debug.gctrace > 0) {
if(sumreleased > 0)
runtime·printf("scvg%d: %D MB released\n", k, (uint64)sumreleased>>20);
runtime·printf("scvg%d: inuse: %D, idle: %D, sys: %D, released: %D, consumed: %D (MB)\n",
k, mstats.heap_inuse>>20, mstats.heap_idle>>20, mstats.heap_sys>>20,
mstats.heap_released>>20, (mstats.heap_sys - mstats.heap_released)>>20);
}
}
static FuncVal forcegchelperv = {(void(*)(void))forcegchelper};
@ -437,8 +444,7 @@ runtime·MHeap_Scavenger(void)
{
MHeap *h;
uint64 tick, now, forcegc, limit;
uint32 k;
uintptr sumreleased;
int32 k;
Note note, *notep;
g->issystem = true;
@ -476,16 +482,8 @@ runtime·MHeap_Scavenger(void)
runtime·lock(h);
now = runtime·nanotime();
}
sumreleased = scavenge(now, limit);
scavenge(k, now, limit);
runtime·unlock(h);
if(runtime·debug.gctrace > 0) {
if(sumreleased > 0)
runtime·printf("scvg%d: %p MB released\n", k, sumreleased>>20);
runtime·printf("scvg%d: inuse: %D, idle: %D, sys: %D, released: %D, consumed: %D (MB)\n",
k, mstats.heap_inuse>>20, mstats.heap_idle>>20, mstats.heap_sys>>20,
mstats.heap_released>>20, (mstats.heap_sys - mstats.heap_released)>>20);
}
}
}
@ -494,7 +492,7 @@ runtime∕debug·freeOSMemory(void)
{
runtime·gc(1);
runtime·lock(&runtime·mheap);
scavenge(~(uintptr)0, 0);
scavenge(-1, ~(uintptr)0, 0);
runtime·unlock(&runtime·mheap);
}