From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: Leo Yan <leo.yan@linaro.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Mike Leach <mike.leach@linaro.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>, Jiri Olsa <jolsa@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
Daniel Kiss <Daniel.Kiss@arm.com>,
Denis Nikitin <denik@chromium.org>,
coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 5/7] perf cs-etm: Fixup PID_FMT when it is zero
Date: Mon, 11 Jan 2021 09:47:31 +0000 [thread overview]
Message-ID: <27c8f898-93f3-6a2d-5e9e-b5b1225df1c9@arm.com> (raw)
In-Reply-To: <20210109074435.626855-6-leo.yan@linaro.org>
On 1/9/21 7:44 AM, Leo Yan wrote:
> If the metadata item CS_ETM_PID_FMT/CS_ETMV4_PID_FMT is zero, this means
> the perf data file is recorded with old version tool and the tool has
> not extended to support the item.
>
> For this case, this patch fixes up PID_FMT entry to set the value as
> BIT(ETM_OPT_CTXTID), this info will be delivered to the decoder to
> extract PID from packet's field "context_id".
>
> Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
> tools/perf/util/cs-etm.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 763085db29ae..8c125134a756 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -7,6 +7,7 @@
> */
>
> #include <linux/bitops.h>
> +#include <linux/coresight-pmu.h>
> #include <linux/err.h>
> #include <linux/kernel.h>
> #include <linux/log2.h>
> @@ -2577,6 +2578,15 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
> for (k = 0; k < metadata_cpu_array_size; k++)
> metadata[j][k] = ptr[i + k];
>
> + /*
> + * If the data in CS_ETM_PID_FMT is zero, means the
> + * information isn't stored in the data file, this is
> + * because the old perf tool hasn't yet supported
> + * CS_ETM_PID_FMT. Fixup the item to option "CTXTID".
> + */
> + if (!metadata[j][CS_ETM_PID_FMT])
> + metadata[j][CS_ETM_PID_FMT] = BIT(ETM_OPT_CTXTID);
> +
> /* The traceID is our handle */
> idx = metadata[j][CS_ETM_ETMTRACEIDR];
> i += metadata_cpu_array_size;
> @@ -2590,6 +2600,15 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
> for (k = 0; k < metadata_cpu_array_size; k++)
> metadata[j][k] = ptr[i + k];
>
> + /*
> + * If the data in CS_ETMV4_PID_FMT is zero, means the
> + * information isn't stored in the data file, this is
> + * because the old perf tool hasn't yet supported
> + * CS_ETMV4_PID_FMT. Fixup the item to option "CTXTID".
> + */
> + if (!metadata[j][CS_ETMV4_PID_FMT])
> + metadata[j][CS_ETMV4_PID_FMT] = BIT(ETM_OPT_CTXTID);
> +
> /* The traceID is our handle */
> idx = metadata[j][CS_ETMV4_TRCTRACEIDR];
> i += metadata_cpu_array_size;
>
next prev parent reply other threads:[~2021-01-11 9:48 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-09 7:44 [PATCH v1 0/7] coresight: etm-perf: Fix pid tracing with VHE Leo Yan
2021-01-09 7:44 ` [PATCH v1 1/7] coresight: etm-perf: Add support for PID tracing for kernel at EL2 Leo Yan
2021-01-11 16:22 ` Mike Leach
2021-01-12 7:22 ` Leo Yan
2021-01-12 8:58 ` Leo Yan
2021-01-12 11:03 ` Suzuki K Poulose
2021-01-12 11:23 ` Mike Leach
2021-01-12 14:14 ` Leo Yan
2021-01-12 23:43 ` Mike Leach
2021-01-15 22:30 ` Mathieu Poirier
2021-01-19 7:05 ` Suzuki K Poulose
2021-01-09 7:44 ` [PATCH v1 2/7] perf cs_etm: Use pid tracing explicitly instead of contextid Leo Yan
2021-01-15 22:44 ` Mathieu Poirier
2021-01-19 2:32 ` Leo Yan
2021-01-09 7:44 ` [PATCH v1 3/7] perf cs-etm: Calculate per CPU metadata array size Leo Yan
2021-01-11 7:28 ` Suzuki K Poulose
2021-01-11 12:09 ` Mike Leach
2021-01-11 15:06 ` Leo Yan
2021-01-13 0:00 ` Mike Leach
2021-01-13 2:27 ` Leo Yan
2021-01-15 22:46 ` Mathieu Poirier
2021-01-16 0:50 ` Leo Yan
2021-01-09 7:44 ` [PATCH v1 4/7] perf cs-etm: Add PID format into metadata Leo Yan
2021-01-11 9:45 ` Suzuki K Poulose
2021-01-11 13:12 ` Leo Yan
2021-01-09 7:44 ` [PATCH v1 5/7] perf cs-etm: Fixup PID_FMT when it is zero Leo Yan
2021-01-11 9:47 ` Suzuki K Poulose [this message]
2021-01-09 7:44 ` [PATCH v1 6/7] perf cs-etm: Add helper cs_etm__get_pid_fmt() Leo Yan
2021-01-11 9:55 ` Suzuki K Poulose
2021-01-09 7:44 ` [PATCH v1 7/7] perf cs-etm: Detect pid in VMID for kernel running at EL2 Leo Yan
2021-01-11 10:07 ` Suzuki K Poulose
2021-01-11 13:10 ` Leo Yan
2021-01-11 18:16 ` [PATCH v1 0/7] coresight: etm-perf: Fix pid tracing with VHE Mathieu Poirier
2021-01-12 7:23 ` Leo Yan
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