1362109 - Use the parent process's startTime when dumping content process profiles

Status: RESOLVED WONTFIX

(Core :: Gecko Profiler, enhancement)

Description

[Markus Stange [:mstange]]

At the moment, each process has a different profiler startTime, and perf.html has to look at each process's profile.meta.startTime and adjust all time values in the subprocess profile.
It would be nice if Gecko could do this adjustment itself.

Comment 1

[Markus Stange [:mstange]]

When I filed this bug I was assuming that we were storing TimeStamp values in the buffer and in the markers, but that's not true. We store "double" values, which are computed as (time - CorePS::ProcessStartTime()).ToMilliseconds(). And it would be hard to get the parent process startup time as a TimeStamp during profiler_init in the content process.

I'm thinking that this bug may not be worth spending time on.