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Commit 2bc60ffd authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf intel-pt: Add documentation for new config terms 



Add documentation for new config terms.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-13-git-send-email-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 9fd629f9

tools/perf/Documentation/intel-pt.txt

+36 −0
Original line number Diff line number Diff line
@@ -364,6 +364,42 @@ cyc_thresh Specifies how frequently CYC packets are produced - see cyc 


		CYC packets are not requested by default.



pt		Specifies pass-through which enables the 'branch' config term.



		The default config selects 'pt' if it is available, so a user will

		never need to specify this term.



branch		Enable branch tracing.  Branch tracing is enabled by default so to

		disable branch tracing use 'branch=0'.



		The default config selects 'branch' if it is available.



ptw		Enable PTWRITE packets which are produced when a ptwrite instruction

		is executed.



		Support for this feature is indicated by:



			/sys/bus/event_source/devices/intel_pt/caps/ptwrite



		which contains "1" if the feature is supported and

		"0" otherwise.



fup_on_ptw	Enable a FUP packet to follow the PTWRITE packet.  The FUP packet

		provides the address of the ptwrite instruction.  In the absence of

		fup_on_ptw, the decoder will use the address of the previous branch

		if branch tracing is enabled, otherwise the address will be zero.

		Note that fup_on_ptw will work even when branch tracing is disabled.



pwr_evt		Enable power events.  The power events provide information about

		changes to the CPU C-state.



		Support for this feature is indicated by:



			/sys/bus/event_source/devices/intel_pt/caps/power_event_trace



		which contains "1" if the feature is supported and

		"0" otherwise.





new snapshot option

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