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Bug 1181175 - Telemetry for finding out how often our process is rescheduled to another CPU. r=jandem, r=bsmedberg

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This commit is contained in:
David Rajchenbach-Teller
2015-07-29 19:01:05 +02:00
parent f8b7411af4
commit 0979349348
7 changed files with 95 additions and 7 deletions
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32
toolkit/components/perfmonitoring/nsPerformanceStats.cpp
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@@ -21,6 +21,10 @@
#include "nsIDOMWindow.h"
#include "nsGlobalWindow.h"
#include "mozilla/unused.h"
#include "mozilla/Services.h"
#include "mozilla/Telemetry.h"
#if defined(XP_WIN)
#include "windows.h"
#else
@@ -440,7 +444,7 @@ NS_IMETHODIMP nsPerformanceSnapshot::GetProcessData(nsIPerformanceStats * *aProc
}
NS_IMPL_ISUPPORTS(nsPerformanceStatsService, nsIPerformanceStatsService)
NS_IMPL_ISUPPORTS(nsPerformanceStatsService, nsIPerformanceStatsService, nsIObserver)
nsPerformanceStatsService::nsPerformanceStatsService()
#if defined(XP_WIN)
@@ -448,7 +452,13 @@ nsPerformanceStatsService::nsPerformanceStatsService()
#else
: mProcessId(getpid())
#endif
, mProcessStayed(0)
, mProcessMoved(0)
{
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
mozilla::unused << obs->AddObserver(this, "profile-before-shutdown", false);
}
}
nsPerformanceStatsService::~nsPerformanceStatsService()
@@ -507,8 +517,28 @@ NS_IMETHODIMP nsPerformanceStatsService::GetSnapshot(JSContext* cx, nsIPerforman
return rv;
}
js::GetPerfMonitoringTestCpuRescheduling(JS_GetRuntime(cx), &mProcessStayed, &mProcessMoved);
snapshot.forget(aSnapshot);
return NS_OK;
}
/* void observe (in nsISupports aSubject, in string aTopic, in wstring aData); */
NS_IMETHODIMP nsPerformanceStatsService::Observe(nsISupports *, const char *, const char16_t *)
{
// Upload telemetry
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
mozilla::unused << obs->RemoveObserver(this, "profile-before-shutdown");
}
if (mProcessStayed + mProcessMoved == 0) {
// Nothing to report.
return NS_OK;
}
const uint32_t proportion = ( 100 * mProcessStayed ) / ( mProcessStayed + mProcessMoved );
mozilla::Telemetry::Accumulate("PERF_MONITORING_TEST_CPU_RESCHEDULING_PROPORTION_MOVED", proportion);
return NS_OK;
}