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

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Message-ID: <ZkjdQqN1dPsZDDRA@google.com>
Date: Sat, 18 May 2024 18:54:26 +0200
From: "Steinar H. Gunderson" <sesse@...gle.com>
To: acme@...nel.org
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	irogers@...gle.com
Subject: Re: [PATCH v2] Add a trie to map quickly from address range to
 compilation unit.

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.

/* Steinar */