Em Wed, Jul 08, 2015 at 04:42:03PM +0300, Adrian Hunter escreveu:
> On 08/07/15 16:28, Arnaldo Carvalho de Melo wrote:
> > Em Wed, Jul 08, 2015 at 12:52:40AM +0200, Peter Zijlstra escreveu:
> >> On Tue, Jul 07, 2015 at 01:13:59PM -0300, Arnaldo Carvalho de Melo wrote:
> >>> Em Tue, Jul 07, 2015 at
On 08/07/15 16:28, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jul 08, 2015 at 12:52:40AM +0200, Peter Zijlstra escreveu:
>> On Tue, Jul 07, 2015 at 01:13:59PM -0300, Arnaldo Carvalho de Melo wrote:
>>> Em Tue, Jul 07, 2015 at 05:36:14PM +0200, Peter Zijlstra escreveu:
> To help userspace in plac
Em Wed, Jul 08, 2015 at 12:52:40AM +0200, Peter Zijlstra escreveu:
> On Tue, Jul 07, 2015 at 01:13:59PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Jul 07, 2015 at 05:36:14PM +0200, Peter Zijlstra escreveu:
> > > > To help userspace in places where all it has is the union perf_event, we
> >
On Tue, Jul 07, 2015 at 01:13:59PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jul 07, 2015 at 05:36:14PM +0200, Peter Zijlstra escreveu:
> > > To help userspace in places where all it has is the union perf_event, we
> > > can reuse one bit in misc to state that, i.e.
>
> > > #define PERF_R
Em Tue, Jul 07, 2015 at 05:36:14PM +0200, Peter Zijlstra escreveu:
> On Tue, Jul 07, 2015 at 10:44:37AM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Jul 07, 2015 at 10:25:52AM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Tue, Jul 07, 2015 at 11:36:39AM +0300, Adrian Hunter escreveu:
> >
On Tue, Jul 07, 2015 at 10:44:37AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jul 07, 2015 at 10:25:52AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Jul 07, 2015 at 11:36:39AM +0300, Adrian Hunter escreveu:
> > > To make the event useful for privileged users also, if the
> > > conte
Em Tue, Jul 07, 2015 at 10:25:52AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Jul 07, 2015 at 11:36:39AM +0300, Adrian Hunter escreveu:
> > To make the event useful for privileged users also, if the
> > context is cpu-wide then the event will also provide the
> > next or previous pid/tid.
Em Tue, Jul 07, 2015 at 11:36:39AM +0300, Adrian Hunter escreveu:
> To make the event useful for privileged users also, if the
> context is cpu-wide then the event will also provide the
> next or previous pid/tid.
> + /*
> + * Records a context switch in or out (flagged by
> + *
There are already two events for context switches, namely
the tracepoint sched:sched_switch and the software event
context_switches. Unfortunately neither are suitable for
use by non-privileged users for the purpose of synchronizing
hardware trace data (e.g. Intel PT) to the context switch.
Tracep
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