Messages in this thread | | | Subject | Re: [PATCH 1/2] perf: Add persistent events | From | Peter Zijlstra <> | Date | Sun, 23 May 2010 20:40:47 +0200 |
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On Sun, 2010-05-23 at 20:33 +0200, Borislav Petkov wrote: > From: Peter Zijlstra <peterz@infradead.org> > Date: Sun, May 23, 2010 at 08:15:13PM +0200 > > > On Sat, 2010-05-22 at 21:00 +0200, Borislav Petkov wrote: > > > Register and enable events marked as persistent right after perf events > > > has initialized. > > > > > > Not-yet-signed-off-by: Borislav Petkov <bp@alien8.de> > > > > Nah, this is totally wrong. > > > > A persistent event would simply be a regular event, but created by the > > kernel and not tied to a file-desc's lifetime. > > So you're saying the trace_mce_record() tracepoint for example should > be created completely internally in the kernel and cease to be a > tracepoint? Will it still be able to be selected by perf -e?
No, it should be a regular tracepoint as far as tracepoints are concerned.
But the only thing persistence should add is an instance of a perf_event, it should not modify either the perf_event nor the tracepoint code.
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