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testing: parallelize tests over count

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Currently all package tests are executed once
with Parallel tests executed in parallel.
Then this process is repeated count*cpu times.
Tests are not parallelized over count*cpu.
Parallelizing over cpu is not possible as
GOMAXPROCS is a global setting. But it is
possible for count.

Parallelize over count.

Brings down testing of my package with -count=100
form 10s to 0.3s.

Change-Id: I76d8322adeb8c5c6e70b99af690291fd69d6402a
Reviewed-on: https://go-review.googlesource.com/44830
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Dmitry Vyukov 2017-06-05 10:37:37 +02:00
parent f7aa454c58
commit f04d583618
2 changed files with 63 additions and 63 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/testing/benchmark.go
View file

@ -427,11 +427,12 @@ func runBenchmarks(importPath string, matchString func(pat, str string) (bool, e
// processBench runs bench b for the configured CPU counts and prints the results.
func (ctx *benchContext) processBench(b *B) {
for i, procs := range cpuList {
for j := uint(0); j < *count; j++ {
runtime.GOMAXPROCS(procs)
benchName := benchmarkName(b.name, procs)
fmt.Fprintf(b.w, "%-*s\t", ctx.maxLen, benchName)
// Recompute the running time for all but the first iteration.
if i > 0 {
if i > 0 || j > 0 {
b = &B{
common: common{
signal: make(chan bool),
@ -467,6 +468,7 @@ func (ctx *benchContext) processBench(b *B) {
fmt.Fprintf(os.Stderr, "testing: %s left GOMAXPROCS set to %d\n", benchName, p)
}
}
}
}
// Run benchmarks f as a subbenchmark with the given name. It reports

6
src/testing/testing.go
View file

@ -991,6 +991,7 @@ func runTests(matchString func(pat, str string) (bool, error), tests []InternalT
ok = true
for _, procs := range cpuList {
runtime.GOMAXPROCS(procs)
for i := uint(0); i < *count; i++ {
ctx := newTestContext(*parallel, newMatcher(matchString, *match, "-test.run"))
t := &T{
common: common{
@ -1013,6 +1014,7 @@ func runTests(matchString func(pat, str string) (bool, error), tests []InternalT
ok = ok && !t.Failed()
ran = ran || t.ran
}
}
return ran, ok
}
@ -1167,13 +1169,9 @@ func parseCpuList() {
fmt.Fprintf(os.Stderr, "testing: invalid value %q for -test.cpu\n", val)
os.Exit(1)
}
for i := uint(0); i < *count; i++ {
cpuList = append(cpuList, cpu)
}
}
if cpuList == nil {
for i := uint(0); i < *count; i++ {
cpuList = append(cpuList, runtime.GOMAXPROCS(-1))
}
}
}