linux-kernel - Re: [PATCH v2] perf top: expand the range of multithreaded phase

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Message-ID: <20230410025808.2008-1-laihangliang1@huawei.com>
Date:   Mon, 10 Apr 2023 10:58:08 +0800
From:   Hangliang Lai <laihangliang1@...wei.com>
To:     <namhyung@...nel.org>
CC:     <acme@...nel.org>, <adrian.hunter@...el.com>,
        <alexander.shishkin@...ux.intel.com>, <brauner@...nel.org>,
        <hewenliang4@...wei.com>, <irogers@...gle.com>, <jolsa@...nel.org>,
        <laihangliang1@...wei.com>, <linfeilong@...wei.com>,
        <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <liuwenyu7@...wei.com>, <mark.rutland@....com>, <mingo@...hat.com>,
        <yeyunfeng@...wei.com>
Subject: Re: [PATCH v2] perf top: expand the range of multithreaded phase

Thanks for your reply Kim ,

On 2023-04-07 21:21   you  wrote:

>  Not always, the synthesis can run in a single thread.

But I think in machine__synthesize_threads, there are thread_nr threads will be created to do synthesize_threads_worker(tools/perf/util/synthetic-events.c:970)

It’s not a single thread part. So we're supposed to call perf_set_multithreaded() before synthesize?

Thanks,
Hangliang Lai