On 12/11/13, 5:36 AM, Alexander Shishkin wrote:
From: Adrian Hunter <adrian.hun...@intel.com>
Add an option to cause a selected event
to be opened always without a pid when
configured by perf_evsel__config().
This is needed when using the sched_switch
tracepoint to follow object code execution.
sched_switch occurs before the task
switch and so it cannot record it in a
context limited to that task. Note
that also means that sched_switch is
useless when capturing data per-thread,
as is the 'context-switches' software
event for the same reason.
This seems like a tailored solution for what is really a generic
problem: you need events to have different attributes -- a mix of system
wide, task based, with or without callchains and other sample options.
David
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