linux-kernel - Re: [PATCH v2] Add a trie to map quickly from address range to compilation unit.

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Date: Sun, 19 May 2024 08:50:37 -0700
From: Ian Rogers <irogers@...gle.com>
To: "Steinar H. Gunderson" <sesse@...gle.com>
Cc: acme@...nel.org, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Add a trie to map quickly from address range to
 compilation unit.

On Sat, May 18, 2024 at 9:54 AM Steinar H. Gunderson <sesse@...gle.com> wrote:
>
> On Sat, May 18, 2024 at 06:53:11PM +0200, Steinar H. Gunderson wrote:
> > When using perf to profile large binaries, _bfd_dwarf2_find_nearest_line()
> > becomes a hotspot, as perf wants to get line number information
> > (for inline-detection purposes) for each and every sample. In Chromium
> > in particular (the content_shell binary), this entails going through
> > 475k address ranges, which takes a long time when done repeatedly.
>
> I accidentally sent out an ancient patch anew; sorry, please ignore.

Presumably v1 should be reviewed?

Thanks,
Ian

> /* Steinar */