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Message-ID: <CANLsYkyc85famRPpfZk+O3iHXdbULV8-a=izUq=GbgMeiGw=Og@mail.gmail.com>
Date: Mon, 25 Jan 2016 13:48:28 -0700
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: "linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH V8 21/23] perf tools: adding perf_evlist to *info_priv_size()
On 14 January 2016 at 14:46, Mathieu Poirier <mathieu.poirier@...aro.org> wrote:
> On some architecture the size of the private header may
> be dependent on the number of tracers used in the session. As
> such adding a "struct perf_evlist *" parameter, which should
> contain all the required information.
>
> Also adjusting the existing client of the interface to take
> the new parameter into account.
>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> ---
> tools/perf/arch/x86/util/intel-bts.c | 4 +++-
> tools/perf/arch/x86/util/intel-pt.c | 4 +++-
> tools/perf/util/auxtrace.c | 7 ++++---
> tools/perf/util/auxtrace.h | 6 ++++--
> 4 files changed, 14 insertions(+), 7 deletions(-)
>
> diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c
> index 9b94ce520917..4685a40777cc 100644
> --- a/tools/perf/arch/x86/util/intel-bts.c
> +++ b/tools/perf/arch/x86/util/intel-bts.c
> @@ -60,7 +60,9 @@ struct branch {
> u64 misc;
> };
>
> -static size_t intel_bts_info_priv_size(struct auxtrace_record *itr __maybe_unused)
> +static size_t
> +intel_bts_info_priv_size(struct auxtrace_record *itr __maybe_unused,
> + struct perf_evlist *evlist __maybe_unused)
> {
> return INTEL_BTS_AUXTRACE_PRIV_SIZE;
> }
> diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
> index b02af064f0f9..e5c1f2e21f87 100644
> --- a/tools/perf/arch/x86/util/intel-pt.c
> +++ b/tools/perf/arch/x86/util/intel-pt.c
> @@ -273,7 +273,9 @@ intel_pt_pmu_default_config(struct perf_pmu *intel_pt_pmu)
> return attr;
> }
>
> -static size_t intel_pt_info_priv_size(struct auxtrace_record *itr __maybe_unused)
> +static size_t
> +intel_pt_info_priv_size(struct auxtrace_record *itr __maybe_unused,
> + struct perf_evlist *evlist __maybe_unused)
> {
> return INTEL_PT_AUXTRACE_PRIV_SIZE;
> }
> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
> index 7f10430af39c..cc1c9ce5cc56 100644
> --- a/tools/perf/util/auxtrace.c
> +++ b/tools/perf/util/auxtrace.c
> @@ -478,10 +478,11 @@ void auxtrace_heap__pop(struct auxtrace_heap *heap)
> heap_array[last].ordinal);
> }
>
> -size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr)
> +size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
> + struct perf_evlist *evlist)
> {
> if (itr)
> - return itr->info_priv_size(itr);
> + return itr->info_priv_size(itr, evlist);
> return 0;
> }
>
> @@ -852,7 +853,7 @@ int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
> int err;
>
> pr_debug2("Synthesizing auxtrace information\n");
> - priv_size = auxtrace_record__info_priv_size(itr);
> + priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
> ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size);
> if (!ev)
> return -ENOMEM;
> diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h
> index b86f90db1352..e5a8e2d4f2af 100644
> --- a/tools/perf/util/auxtrace.h
> +++ b/tools/perf/util/auxtrace.h
> @@ -293,7 +293,8 @@ struct auxtrace_record {
> int (*recording_options)(struct auxtrace_record *itr,
> struct perf_evlist *evlist,
> struct record_opts *opts);
> - size_t (*info_priv_size)(struct auxtrace_record *itr);
> + size_t (*info_priv_size)(struct auxtrace_record *itr,
> + struct perf_evlist *evlist);
> int (*info_fill)(struct auxtrace_record *itr,
> struct perf_session *session,
> struct auxtrace_info_event *auxtrace_info,
> @@ -429,7 +430,8 @@ int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
> int auxtrace_record__options(struct auxtrace_record *itr,
> struct perf_evlist *evlist,
> struct record_opts *opts);
> -size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr);
> +size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
> + struct perf_evlist *evlist);
> int auxtrace_record__info_fill(struct auxtrace_record *itr,
> struct perf_session *session,
> struct auxtrace_info_event *auxtrace_info,
> --
> 2.1.4
>
Arnaldo,
As with my previous email, I can't queue this patch for 4.6 without at
least a reviewed by from you.
It has been rebased to 4.5-rc1 here [1] for your convenience. I will
be happy to use another baseline should that be more adequate for you.
Thanks,
Mathieu
[1]. https://git.linaro.org/people/mathieu.poirier/coresight.git/shortlog/refs/heads/perf-v4.5-rc1-V8
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