linux-kernel - Re: [PATCH v2 0/4] perf annotate: Improve memory usage for symbol histogram

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Message-ID: <170984809560.445746.8499697523973754680.b4-ty@kernel.org>
Date: Thu,  7 Mar 2024 13:48:46 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v2 0/4] perf annotate: Improve memory usage for symbol histogram

On Mon, 4 Mar 2024 15:08:11 -0800, Namhyung Kim wrote:
> This is another series of memory optimization in perf annotate.
> 
> v2 changes:
>  * fix a bug when offset is bigger than 16 bits
> 
> 
> When perf annotate (or perf report/top with TUI) processes samples, it
> needs to save the sample period (overhead) at instruction level.  For
> now, it allocates an array to do that for the whole symbol when it
> hits any new symbol.  This comes with a lot of waste since samples can
> be very few and instructions span to multiple bytes.
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
-- 
Namhyung Kim <namhyung@...nel.org>