linux-kernel - Re: [PATCH v4 02/12] perf record: introduce thread specific data array

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Message-ID: <be1a7df0-866d-352f-846a-e5a73500b172@linux.intel.com>
Date:   Fri, 9 Apr 2021 10:06:08 +0300
From:   "Bayduraev, Alexey V" <alexey.v.bayduraev@...ux.intel.com>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexei Budankov <abudankov@...wei.com>,
        Alexander Antonov <alexander.antonov@...ux.intel.com>
Subject: Re: [PATCH v4 02/12] perf record: introduce thread specific data
 array

Hi,

On 08.04.2021 17:16, Andi Kleen wrote:
>> +		} else {
>> +			thread_data[t].tid = syscall(SYS_gettid);
> 
> That always fills in the tid of the setup thread instead of the target
> threads?
> 

Here we set the tid for 0-thread (for cpu 0), other threads we setup
later in record__thread(), see [PATCH v4 05/12].

Regards,
Alexey