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runtime: Make gc_test test extra allocated space, not total space.

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Testing total space fails for gccgo when not using split
stacks, because then each goroutine has a large stack, and so
the total memory usage is large.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5487068
This commit is contained in:
Ian Lance Taylor 2011-12-13 15:12:55 -08:00
parent 64776da456
commit 26239417bb
1 changed files with 12 additions and 4 deletions
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16
src/pkg/runtime/gc_test.go
View File

@ -6,16 +6,24 @@ import (
)
func TestGcSys(t *testing.T) {
runtime.GC()
runtime.UpdateMemStats()
sys := runtime.MemStats.Sys
for i := 0; i < 1000000; i++ {
workthegc()
}
// Should only be using a few MB.
runtime.UpdateMemStats()
sys := runtime.MemStats.Sys
t.Logf("using %d MB", sys>>20)
if sys > 10e6 {
t.Fatalf("using too much memory: %d MB", sys>>20)
if sys > runtime.MemStats.Sys {
sys = 0
} else {
sys = runtime.MemStats.Sys - sys
}
t.Logf("used %d extra bytes", sys)
if sys > 2<<20 {
t.Fatalf("using too much memory: %d bytes", sys)
}
}