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From: Namhyung Kim <namhyung@kernel.org>
To: acme@kernel.org, irogers@google.com,
	"Krzysztof Łopatowski" <krzysztof.m.lopatowski@gmail.com>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf: Improve startup time by reducing unnecessary stat() calls
Date: Thu, 20 Feb 2025 10:26:14 -0800	[thread overview]
Message-ID: <174007597483.1790567.5712005674301381670.b4-ty@kernel.org> (raw)
In-Reply-To: <20250206113314.335376-2-krzysztof.m.lopatowski@gmail.com>

On Thu, 06 Feb 2025 12:33:15 +0100, Krzysztof Łopatowski wrote:
> When testing perf trace on NixOS, I noticed significant startup delays:
> - `ls`: ~2ms
> - `strace ls`: ~10ms
> - `perf trace ls`: ~550ms
> 
> Profiling showed that 51% of the time is spent reading files,
> 26% in loading BPF programs, and 11% in `newfstatat`.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung



      parent reply	other threads:[~2025-02-20 18:26 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-06 11:33 Krzysztof Łopatowski
2025-02-06 17:54 ` Ian Rogers
2025-02-06 21:45   ` Krzysztof Łopatowski
2025-02-12  2:10     ` Namhyung Kim
2025-02-07  1:04 ` Howard Chu
2025-02-07  8:31   ` Krzysztof Łopatowski
2025-02-20 18:26 ` Namhyung Kim [this message]

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