linux-kernel - Re: [PATCH 11/11] perf intel-pt: Add support for decoding PSB+ only

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Date:   Thu, 9 Jul 2020 10:59:37 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/11] perf intel-pt: Add support for decoding PSB+ only

> diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt
> index 758295a7e3d6..849474629fe7 100644
> --- a/tools/perf/Documentation/perf-intel-pt.txt
> +++ b/tools/perf/Documentation/perf-intel-pt.txt
> @@ -973,6 +973,9 @@ useful only if the control flow of interest is represented or indicated by FUP,
>  TIP, TIP.PGE, or TIP.PGD packets.  However the q option could be used to find
>  time ranges that could then be decoded fully using the --time option.
>  
> +Repeating the q option (i.e. qq) decodes only PSB+, getting ip if there is a
> +FUP packet within PSB+ (i.e. between PSB and PSBEND).

Also need high level description without PT jargon
(and perhaps also reference how to configure PSB frequency)

Other than that great feature. I'll be an enthuisastic user :-)

-Andi
>