linux.git/tools/perf/util/evlist.c, branch v4.20

perf evlist: Move perf_evsel__reset_weak_group into evlist

2018-11-05T17:37:09+00:00

- Move the function from builtin-stat to evlist for reuse
- Rename to evlist to match purpose better
- Pass the evlist as first argument.
- No functional changes

Signed-off-by: Andi Kleen 
Acked-by: Jiri Olsa 
Link: http://lkml.kernel.org/r/20181001195927.14211-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo

perf evsel: Mark a evsel as disabled when asking the kernel do disable it

2018-10-22T15:37:45+00:00

Because there may be more such events in the ring buffer that should be
discarded when an app decides to stop considering them.

At some point we'll do this with eBPF, this way we stop them at origin,
before they are placed in the ring buffer.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-uzufuxws4hufigx07ue1dpv6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf mmap: Store real cpu number in 'struct perf_mmap'

2018-08-20T11:54:59+00:00

Store the real cpu number in 'struct perf_mmap', which will be used by
python interface that allows user to read a particular memory map for
given cpu.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: David Ahern 
Cc: Jaroslav Škarvada 
Cc: Joe Mario 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180817114556.28000-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf evlist: Introduce force_leader() method

2018-05-21T17:40:54+00:00

For non-explicit group (e.g. those created with -e '{eventA,eventB}'),
'perf report' supports a option '--group' which can enable group output.

We also need to support 'perf annotate' with the same '--group'.

Create a new function perf_evlist__force_leader() which contains common
code to force setting the group leader.

Signed-off-by: Jin Yao 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1526914666-31839-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf evlist: Store 'overwrite' in struct perf_mmap

2018-03-08T13:05:50+00:00

It has been determined that the map is for overwrite mode
(evlist->overwrite_mmap) or non-overwrite mode (evlist->mmap) when
calling perf_evlist__alloc_mmap().

Store the information in struct perf_mmap, which will be used later to
simplify the perf_mmap__read*() interfaces.

Signed-off-by: Kan Liang 
Suggested-by: Jiri Olsa 
Acked-by: Jiri Olsa 
Cc: Andi Kleen 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1520350567-80082-1-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf mmap: Discard legacy interfaces for mmap read forward

2018-03-05T13:51:10+00:00

Discards legacy interfaces perf_evlist__mmap_read_forward(),
perf_evlist__mmap_read() and perf_evlist__mmap_consume().

No tools use them.

Signed-off-by: Kan Liang 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1519945751-37786-14-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Use target->per_thread and target->system_wide flags

2018-02-16T17:55:40+00:00

Mathieu Poirier reports issue in commit ("73c0ca1eee3d perf thread_map:
Enumerate all threads from /proc") that it has negative impact on 'perf
record --per-thread'. It has the effect of creating a kernel event for
each thread in the system for 'perf record --per-thread'.

Mathieu Poirier's patch ("perf util: Do not reuse target->per_thread flag")
can fix this issue by creating a new target->all_threads flag.

This patch is based on Mathieu Poirier's patch but it doesn't use a new
target->all_threads flag. This patch just uses 'target->per_thread &&
target->system_wide' as a condition to check for all threads case.

Signed-off-by: Jin Yao 
Cc: Alexander Shishkin 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: linux-arm-kernel@lists.infradead.org
Fixes: 73c0ca1eee3d ("perf thread_map: Enumerate all threads from /proc")
Link: http://lkml.kernel.org/r/1518467557-18505-3-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Mathieu Poirier 
[Fixed checkpatch warning about line over 80 characters]
Signed-off-by: Arnaldo Carvalho de Melo

perf evlist: Remove stale mmap read for backward

2018-02-15T12:50:53+00:00

perf_evlist__mmap_read_catchup() and perf_evlist__mmap_read_backward()
are only for overwrite mode.

But they read the evlist->mmap buffer which is for non-overwrite mode.

It did not bring any serious problem yet, because there is no one use
it.

Remove the unused interfaces.

Signed-off-by: Kan Liang 
Acked-by: Jiri Olsa 
Acked-by: Wang Nan 
Cc: Andi Kleen 
Cc: Jin Yao 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1516310792-208685-2-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf evlist: Remove fcntl.h from evlist.h

2018-01-25T09:37:30+00:00

Not needed there, fixup the places where it is needed and was getting
only by luck via evlist.h.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-yxjpetn64z8vjuguu84gr6x6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf evlist: Remove trailing semicolon

2018-01-12T14:02:55+00:00

The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.

Signed-off-by: Luis de Bethencourt 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Joe Perches 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180111155020.9782-1-luisbg@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo