From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org,
Steffen Trumtrar <s.trumtrar@pengutronix.de>
Subject: Re: [PATCH] spi: mvebu: move timekeeping out of hot path
Date: Fri, 12 Sep 2025 09:44:14 +0200 [thread overview]
Message-ID: <175766305411.1757044.14258182261681475716.b4-ty@pengutronix.de> (raw)
In-Reply-To: <20250910-v2025-08-0-topic-mvebu-spi-v1-1-c3e57dbb7503@pengutronix.de>
On Wed, 10 Sep 2025 07:42:25 +0200, Steffen Trumtrar wrote:
> The wait_on_timeout uses get_time_ns for timekeeping. It seems that this
> considerably decreases transfer speeds, because the wait_on_timeout loop
> gets throttled by the timekeeping.
> Moving the timekeeping after the hot path results in ~3x transfer speed.
> Keep the wait_on_timeout after the hot path to be sure, that the code
> nevertheless waits long enough once.
>
> [...]
Applied, thanks!
[1/1] spi: mvebu: move timekeeping out of hot path
https://git.pengutronix.de/cgit/barebox/commit/?id=4ac86ef4ef1e (link may not be stable)
Best regards,
--
Sascha Hauer <s.hauer@pengutronix.de>
prev parent reply other threads:[~2025-09-12 7:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-10 5:42 Steffen Trumtrar
2025-09-12 7:44 ` Sascha Hauer [this message]
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