linux-kernel - Re: [PATCH v4 3/4] perf report: Add SPE options to --itrace argument

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Date:   Mon, 17 Feb 2020 13:39:56 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     James Clark <james.clark@....com>, jolsa@...hat.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     nd@....com, Tan Xiaojun <tanxiaojun@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Al Grant <al.grant@....com>, Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v4 3/4] perf report: Add SPE options to --itrace argument

On 11/02/20 4:04 pm, James Clark wrote:
> From: Tan Xiaojun <tanxiaojun@...wei.com>
> 
> The previous patch added support in "perf report" for some arm-spe
> events(llc-miss, tlb-miss, branch-miss, remote_access). This patch
> adds their help instructions.
> 
> Signed-off-by: Tan Xiaojun <tanxiaojun@...wei.com>
> Tested-by: Qi Liu <liuqi115@...ilicon.com>
> Signed-off-by: James Clark <james.clark@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: Tan Xiaojun <tanxiaojun@...wei.com>
> Cc: Al Grant <al.grant@....com>
> Cc: Namhyung Kim <namhyung@...nel.org>

There is also ITRACE_HELP in tools/perf/util/auxtrace.h

Otherwise for auxtrace:

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  tools/perf/Documentation/itrace.txt | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt
> index 82ff7dad40c2..8e1488de1fb3 100644
> --- a/tools/perf/Documentation/itrace.txt
> +++ b/tools/perf/Documentation/itrace.txt
> @@ -1,5 +1,5 @@
>  		i	synthesize instructions events
> -		b	synthesize branches events
> +		b	synthesize branches events (branch misses on Arm)
>  		c	synthesize branches events (calls only)
>  		r	synthesize branches events (returns only)
>  		x	synthesize transactions events
> @@ -12,6 +12,9 @@
>  		g	synthesize a call chain (use with i or x)
>  		l	synthesize last branch entries (use with i or x)
>  		s       skip initial number of events
> +		m	synthesize LLC miss events
> +		t	synthesize TLB miss events
> +		a	synthesize remote access events
>  
>  	The default is all events i.e. the same as --itrace=ibxwpe,
>  	except for perf script where it is --itrace=ce
>