From: Thierry Reding <thierry.reding@kernel.org>
To: Tanmay Patil <tanmayp@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>,
Mikko Perttunen <mperttunen@nvidia.com>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>,
dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] gpu: host1x: syncpt_wait micro-optimizations
Date: Thu, 28 May 2026 14:18:41 +0200 [thread overview]
Message-ID: <ahgylxp4s04sb3DL@orome> (raw)
In-Reply-To: <20260514103153.766343-1-tanmayp@nvidia.com>
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On Thu, May 14, 2026 at 10:31:51AM +0000, Tanmay Patil wrote:
> This series reduces the latency in host1x syncpoint wait path.
>
> Patch 1 removes redundant MMIO reads in host1x_syncpt_wait().
> Patch 2 skips the host1x_intr_update_hw_state() call in the ISR
> when no fences remain.
>
> Measured syncpoint wait latency (50000 samples):
> Average latency: 12.2 us -> 9.4 us
> 99.99 pct latency: 62.96 us -> 36.58 us
>
> Tanmay Patil (2):
> gpu: host1x: skip redundant syncpoint loads in host1x_syncpt_wait()
> gpu: host1x: skip redundant HW state update
Both patches applied, thanks.
Thierry
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prev parent reply other threads:[~2026-05-28 12:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-14 10:31 [PATCH 0/2] gpu: host1x: syncpt_wait micro-optimizations Tanmay Patil
2026-05-14 10:31 ` [PATCH 1/2] gpu: host1x: skip redundant syncpoint loads in host1x_syncpt_wait() Tanmay Patil
2026-05-14 10:31 ` [PATCH 2/2] gpu: host1x: skip redundant HW state update Tanmay Patil
2026-05-26 5:55 ` [PATCH 0/2] gpu: host1x: syncpt_wait micro-optimizations Mikko Perttunen
2026-05-28 12:18 ` Thierry Reding [this message]
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