From: Peter Zijlstra <peterz@infradead.org>
To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, jolsa@redhat.com,
adrian.hunter@intel.com, mathieu.poirier@linaro.org,
mark.rutland@arm.com
Subject: Re: [PATCH v2 1/4] perf: Allow using AUX data in perf samples
Date: Thu, 24 Oct 2019 15:52:04 +0200 [thread overview]
Message-ID: <20191024135204.GD4114@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20191022095812.67071-2-alexander.shishkin@linux.intel.com>
On Tue, Oct 22, 2019 at 12:58:09PM +0300, Alexander Shishkin wrote:
> @@ -964,6 +979,7 @@ struct perf_sample_data {
> u32 reserved;
> } cpu_entry;
> struct perf_callchain_entry *callchain;
> + u64 aux_size;
>
> /*
> * regs_user may point to task_pt_regs or to regs_user_copy, depending
> @@ -996,6 +1012,7 @@ static inline void perf_sample_data_init(struct perf_sample_data *data,
> data->weight = 0;
> data->data_src.val = PERF_MEM_NA;
> data->txn = 0;
> + data->aux_size = 0;
> }
>
That is really sad; so far we've managed to only touch a single
cacheline there, you just wrecked that.
next prev parent reply other threads:[~2019-10-24 13:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-22 9:58 [PATCH v2 0/4] perf: Add AUX data sampling Alexander Shishkin
2019-10-22 9:58 ` [PATCH v2 1/4] perf: Allow using AUX data in perf samples Alexander Shishkin
2019-10-24 13:52 ` Peter Zijlstra [this message]
2019-10-24 14:01 ` Peter Zijlstra
2019-10-25 12:52 ` Alexander Shishkin
2019-10-24 14:06 ` Peter Zijlstra
2019-10-25 12:21 ` Alexander Shishkin
2019-10-24 14:09 ` Peter Zijlstra
2019-10-24 14:12 ` Peter Zijlstra
2019-10-22 9:58 ` [PATCH v2 2/4] perf/x86/intel/pt: Factor out starting the trace Alexander Shishkin
2019-10-22 9:58 ` [PATCH v2 3/4] perf/x86/intel/pt: Add sampling support Alexander Shishkin
2019-10-22 9:58 ` [PATCH v2 4/4] perf/x86/intel/pt: Opportunistically use single range output mode Alexander Shishkin
2019-10-23 15:09 ` Alexander Shishkin
2019-10-24 13:56 ` Peter Zijlstra
2019-10-25 12:19 ` Alexander Shishkin
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