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Bug 1676984 - Make IdleScheduler to use CollectProcessInfo to access cpucount, r=emalysz

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Differential Revision: https://phabricator.services.mozilla.com/D96947
This commit is contained in:
Olli Pettay 2020-11-13 22:10:18 +00:00
parent df360bf8cf
commit ba16304298
1 changed files with 5 additions and 12 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

17
ipc/glue/IdleSchedulerParent.cpp
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@ -8,7 +8,6 @@
#include "mozilla/StaticPrefs_page_load.h" #include "mozilla/StaticPrefs_page_load.h"
#include "mozilla/Unused.h" #include "mozilla/Unused.h"
#include "mozilla/ipc/IdleSchedulerParent.h" #include "mozilla/ipc/IdleSchedulerParent.h"
#include "nsIPropertyBag2.h"
#include "nsSystemInfo.h" #include "nsSystemInfo.h"
#include "nsThreadUtils.h" #include "nsThreadUtils.h"
#include "nsITimer.h" #include "nsITimer.h"
@ -42,16 +41,10 @@ IdleSchedulerParent::IdleSchedulerParent() {
// Always pretend that there is at least one core for child processes. // Always pretend that there is at least one core for child processes.
// If there are multiple logical cores, reserve one for the parent // If there are multiple logical cores, reserve one for the parent
// process and for the non-main threads. // process and for the non-main threads.
nsCOMPtr<nsIPropertyBag2> infoService = ProcessInfo processInfo = {};
do_GetService(NS_SYSTEMINFO_CONTRACTID); if (NS_SUCCEEDED(CollectProcessInfo(processInfo)) &&
if (infoService) { processInfo.cpuCount > 1) {
int32_t cpus; sCPUsForChildProcesses = processInfo.cpuCount - 1;
nsresult rv =
infoService->GetPropertyAsInt32(u"cpucount"_ns, &cpus);
if (NS_SUCCEEDED(rv) && cpus > 1) {
sCPUsForChildProcesses = cpus - 1;
}
// We have a new cpu count, reschedule idle scheduler. // We have a new cpu count, reschedule idle scheduler.
nsCOMPtr<nsIRunnable> runnable = nsCOMPtr<nsIRunnable> runnable =
NS_NewRunnableFunction("IdleSchedulerParent::Schedule", []() { NS_NewRunnableFunction("IdleSchedulerParent::Schedule", []() {
@ -65,7 +58,7 @@ IdleSchedulerParent::IdleSchedulerParent() {
thread->Dispatch(runnable, NS_DISPATCH_NORMAL); thread->Dispatch(runnable, NS_DISPATCH_NORMAL);
} }
}); });
NS_DispatchToMainThread(runnable); NS_DispatchBackgroundTask(runnable.forget(), NS_DISPATCH_EVENT_MAY_BLOCK);
} }
} }