On Fri, Jul 24, 2020 at 03:11:10PM +0800, Wei Li wrote:
> 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]# 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: ffd3d18c20b8d ("perf tools: Add ARM Statistical Profiling Extensions
> (SPE) support")
> Signed-off-by: Wei Li <liwei...@huawei.com>
Thanks for the patch, Wei. I have tested this series on Arm64 D06
platform:
Tested-by: Leo Yan <leo....@linaro.org>
I'd like to wait for Mathieu's ACK.
Thanks,
Leo
> ---
> tools/perf/arch/arm/util/auxtrace.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/tools/perf/arch/arm/util/auxtrace.c
> b/tools/perf/arch/arm/util/auxtrace.c
> index 0a6e75b8777a..28a5d0c18b1d 100644
> --- a/tools/perf/arch/arm/util/auxtrace.c
> +++ b/tools/perf/arch/arm/util/auxtrace.c
> @@ -56,7 +56,7 @@ struct auxtrace_record
> struct perf_pmu *cs_etm_pmu;
> struct evsel *evsel;
> bool found_etm = false;
> - bool found_spe = false;
> + struct perf_pmu *found_spe = NULL;
> static struct perf_pmu **arm_spe_pmus = NULL;
> static int nr_spes = 0;
> int i = 0;
> @@ -74,12 +74,12 @@ struct auxtrace_record
> evsel->core.attr.type == cs_etm_pmu->type)
> found_etm = true;
>
> - if (!nr_spes)
> + if (!nr_spes || found_spe)
> continue;
>
> for (i = 0; i < nr_spes; i++) {
> if (evsel->core.attr.type == arm_spe_pmus[i]->type) {
> - found_spe = true;
> + found_spe = arm_spe_pmus[i];
> break;
> }
> }
> @@ -96,7 +96,7 @@ struct auxtrace_record
>
> #if defined(__aarch64__)
> if (found_spe)
> - return arm_spe_recording_init(err, arm_spe_pmus[i]);
> + return arm_spe_recording_init(err, found_spe);
> #endif
>
> /*
> --
> 2.17.1
>
