linux-kernel - perf record: regression with latest PT fix

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Message-ID: <CABPqkBS10uwjVE+_OyYg0mVM8hbhxU9Jr9eBEFF8KQd_3j4SnQ@mail.gmail.com>
Date:   Mon, 18 Dec 2017 05:03:53 -0800
From:   Stephane Eranian <eranian@...gle.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: perf record: regression with latest PT fix

Hi,


The following patch:

f785657b0fbe perf report: Fix regression when decoding Intel-PT traces

is breaking perf report for me. I get no samples reported from perf report
when running simple perf record commands:

$ perf record -e cycles noploop

Reverting the patch fixes the problem.

Are you seeing this as well?