linux-toradex.git/tools/perf/util/intel-pt.c, branch v4.17-rc5

perf intel-pt: Adjust overlap-checking to support sampling mode

2018-03-08T13:05:58+00:00

Adjust overlap-checking to support sampling mode.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/1520431349-30689-10-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Remove a check for sampling mode

2018-03-08T13:05:58+00:00

Intel PT code already has some preparation for AUX area sampling mode.

However the implementation has changed from the first proposal and one
of the side-effects is that it will not be impossible to support snapshot
mode and sampling mode at the same time.

Although there are no plans to support it, let validation (not yet
implemented) control whether it is allowed rather than low-level
functions.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/1520431349-30689-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Tidy old_buffer handling in intel_pt_get_trace()

2018-03-08T13:05:57+00:00

intel_pt_get_trace() fixes overlaps between the current buffer and the
previous buffer ('old_buffer').

However the previous buffer might not have had usable data (no PSB) so
the comparison must be made against the previous buffer that had usable
data.

Tidy that by keeping a pointer for that purpose in struct intel_pt_queue.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/1520431349-30689-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Get rid of intel_pt_use_buffer_pid_tid()

2018-03-08T13:05:57+00:00

With the new way sampling support will be implemented,
intel_pt_use_buffer_pid_tid() will not be needed. Get rid of it.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/r/1520431349-30689-7-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Fix sync_switch

2018-03-08T13:05:55+00:00

sync_switch is a facility to synchronize decoding more closely with the
point in the kernel when the context actually switched.

The flag when sync_switch is enabled was global to the decoding, whereas
it is really specific to the CPU.

The trace data for different CPUs is put on different queues, so add
sync_switch to the intel_pt_queue structure and use that in preference
to the global setting in the intel_pt structure.

That fixes problems decoding one CPU's trace because sync_switch was
disabled on a different CPU's queue.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1520431349-30689-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Fix overlap detection to identify consecutive buffers correctly

2018-03-08T13:05:54+00:00

Overlap detection was not not updating the buffer's 'consecutive' flag.
Marking buffers consecutive has the advantage that decoding begins from
the start of the buffer instead of the first PSB. Fix overlap detection
to identify consecutive buffers correctly.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1520431349-30689-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Get rid of unused 'swapped' parameter from perf_event__synthesize_sample()

2018-01-18T12:01:23+00:00

There is never a need to synthesize a 'swapped' sample, so all callers
to perf_event__synthesize_sample() pass 'false' as the value to
'swapped'. So get rid of the unused 'swapped' parameter.

Signed-off-by: Adrian Hunter 
Acked-by: Jiri Olsa 
Link: http://lkml.kernel.org/r/1516108492-21401-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt/bts: Do not swap when synthesizing samples

2018-01-18T12:00:16+00:00

Both 'perf inject' and internal tools consume cpu endian samples, so
there is never a need to do any swapping when synthesizing samples.

Signed-off-by: Adrian Hunter 
Acked-by: Jiri Olsa 
Link: http://lkml.kernel.org/r/1516108492-21401-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Rename struct perf_data_file to perf_data

2017-10-30T16:36:09+00:00

Rename struct perf_data_file to perf_data, because we will add the
possibility to have multiple files under perf.data, so the 'perf_data'
name fits better.

Signed-off-by: Jiri Olsa 
Cc: Andi Kleen 
Cc: Changbin Du 
Cc: David Ahern 
Cc: Jin Yao 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-39wn4d77phel3dgkzo3lyan0@git.kernel.org
[ Fixup recent changes in 'perf script --per-event-dump' ]
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Synthesize new power and "ptwrite" events

2017-06-30T14:48:28+00:00

Synthesize new power and ptwrite events.

Power events report changes to C-state but I have also added support
for the existing CBR (core-to-bus ratio) packet and included that
when outputting power events.

The PTWRITE packet is associated with the new "ptwrite" instruction,
which is essentially just a way to stuff a 32 or 64 bit value into the
PT trace.

More details can be found in the patches that add documentation and in
the Intel SDM.

Signed-off-by: Adrian Hunter 
Cc: Andi Kleen 
Link: http://lkml.kernel.org/r/1498811805-2335-1-git-send-email-adrian.hunter@intel.com
[ Copy the description of such packet from the patchkit cover message ]
Signed-off-by: Arnaldo Carvalho de Melo