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test: really force heap profile update in heapsampling.go

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The heap profile is only guaranteed to be up-to-date after two GC
cycles, so force two GCs instead of just one.

Updates #13098.

Change-Id: I4fb9287b698f4a3b90b8af9fc6a2efb3b082bfe5
Reviewed-on: https://go-review.googlesource.com/16848
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
This commit is contained in:
Austin Clements 2015-11-12 12:24:36 -05:00
parent 80d0b98d80
commit a9ca2137aa
1 changed files with 3 additions and 0 deletions
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3
test/heapsampling.go
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@ -92,6 +92,9 @@ func checkValue(fname string, ln int, name string, want, got int64) {
func getMemProfileRecords() []runtime.MemProfileRecord { func getMemProfileRecords() []runtime.MemProfileRecord {
// Force the runtime to update the object and byte counts. // Force the runtime to update the object and byte counts.
// This can take up to two GC cycles to get a complete
// snapshot of the current point in time.
runtime.GC()
runtime.GC() runtime.GC()
// Find out how many records there are (MemProfile(nil, true)), // Find out how many records there are (MemProfile(nil, true)),