• Wei Li's avatar
    perf tools: Fix record failure when mixed with ARM SPE event · 31e81e0b
    Wei Li authored
    When recording with cache-misses and arm_spe_x event, I found that it
    will just fail without showing any error info if i put cache-misses
    after 'arm_spe_x' event.
    
      [root@localhost 0620]# perf record -e cache-misses \
    				-e arm_spe_0/ts_enable=1,pct_enable=1,pa_enable=1,load_filter=1,jitter=1,store_filter=1,min_latency=0/ sleep 1
      [ perf record: Woken up 1 times to write data ]
      [ perf record: Captured and wrote 0.067 MB perf.data ]
      [root@localhost 0620]#
      [root@localhost 0620]# perf record -e arm_spe_0/ts_enable=1,pct_enable=1,pa_enable=1,load_filter=1,jitter=1,store_filter=1,min_latency=0/ \
    				     -e  cache-misses sleep 1
      [root@localhost 0620]#
    
    The current code can only work if the only event to be traced is an
    'arm_spe_x', or if it is the last event to be specified. Otherwise the
    last event type will be checked against all the arm_spe_pmus[i]->types,
    none will match and an out of bound 'i' index will be used in
    arm_spe_recording_init().
    
    We don't support concurrent multiple arm_spe_x events currently, that
    is checked in arm_spe_recording_options(), and it will show the relevant
    info. So add the check and record of the first found 'arm_spe_pmu' to
    fix this issue here.
    
    Fixes: ffd3d18c ("perf tools: Add ARM Statistical Profiling Extensions (SPE) support")
    Signed-off-by: default avatarWei Li <liwei391@huawei.com>
    Reviewed-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
    Tested-by-by: default avatarLeo Yan <leo.yan@linaro.org>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Hanjun Guo <guohanjun@huawei.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Kim Phillips <kim.phillips@arm.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Mike Leach <mike.leach@linaro.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
    Cc: linux-arm-kernel@lists.infradead.org
    Link: http://lore.kernel.org/lkml/20200724071111.35593-2-liwei391@huawei.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    31e81e0b
auxtrace.c 2.57 KB