From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CB7253B9D90; Thu, 28 May 2026 12:18:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779970724; cv=none; b=FUKedG35ZYn8o1JGPO+Sum0F6JI5TCLj0ih1r/DCLDJswhADuC/k0GfEaX//pRh008Fvjj7X8cAs/Fuirjl5ju3Mz2tbnost3rcjSX8G0PhC0tIqH0uS2sy5KtyuZ87ot2khDXd3mEEarjn4QQuANNIv3ND2O6qiyIozuJoclNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779970724; c=relaxed/simple; bh=F5AeZ6aR4a91CJIySyCnhhR5y6Kkx+LDOgYTl1DVACo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pKCnbpxFLfcZhMkjfXeKcY2bRRvgMw+Vv6xKj2EYXeQC36fN/XFmLEQiwjnUsp5AVWn7I2LJaShw0e+E4eKwoar7cnOVFAcWMCzp5+t/1PEtZrK1tPEzkWVUMIiIRfO17KY2AEuOFGcJyWp++gEQNliW/LCrWkcBJPI+Ehm6kBA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=la8OcLun; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="la8OcLun" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 101921F00A3A; Thu, 28 May 2026 12:18:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779970723; bh=NH11+mJ5bBQa4zeUL8bXacM3mVoV8R1CnRHTZPVPpQs=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=la8OcLunEi/rFDWmMjDsmibajjd+8SxW1wGBQ6LeuvDpbtJzgVxhPdS7EluHg8blO mA/zSPvFIi1wKHO47EiavI+V1MdqRqUqolTM9a4d3bLrnngRNsAJEt0YZ2F8G/H7qU G0FOuomBkpOaXjMe9CEJ2d6mVyHmXgHNx4B+Ro8jHabpDLXDpOMA18afhPQCH5d5to ILLejknUZR6ykny7YQoJCJ0js2fnKKyb9Z2Gc78FIN7IhzgpMKvFp7rHyNqMhpyIyL UdB2bbcMIZTSppv/5VPjWzVR6QVWw+duyyDT62tNeBJOF3+64nkcneXvVOQJWP89Kr ZEjS44wvcBouA== Date: Thu, 28 May 2026 14:18:41 +0200 From: Thierry Reding To: Tanmay Patil Cc: Thierry Reding , Mikko Perttunen , David Airlie , Simona Vetter , 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 Message-ID: References: <20260514103153.766343-1-tanmayp@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="bmct6mf4goicw7er" Content-Disposition: inline In-Reply-To: <20260514103153.766343-1-tanmayp@nvidia.com> --bmct6mf4goicw7er Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH 0/2] gpu: host1x: syncpt_wait micro-optimizations MIME-Version: 1.0 On Thu, May 14, 2026 at 10:31:51AM +0000, Tanmay Patil wrote: > This series reduces the latency in host1x syncpoint wait path. >=20 > 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. >=20 > Measured syncpoint wait latency (50000 samples): > Average latency: 12.2 us -> 9.4 us > 99.99 pct latency: 62.96 us -> 36.58 us >=20 > 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 --bmct6mf4goicw7er Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAmoYMqAACgkQ3SOs138+ s6Gx+hAAlMUMKg7XBweWXj+62BodkNm8kvFz8QbKkWhemaU0odj362AXOdZtcnyA ccBkH/AduHZzArbUsk4WnGl9tDEWDeMkIb28j9iKxKpg1XVL0Okoz3YG8vI07CT0 9y1mLC6dvFwiHfY6cIkkUjByw5RaoIlArV6Myddq9cL9I5/hLTfWIFqaYstJr9Bb 7xUcTVdYNYYfavIpkoHkw/MeroJbGCOPQxzomvx0rhoj/2FH9+iZgmXRKAHHop9a TPs9pvAur7/uVuwo9RSUfWy9mT2PmXMdFE69nGd8e5O1mWQccBaC7DMViiqFoAoz 2YLeO6ydl9kEdgsgolr032RwP80I7VSKl9hW+kvJ6P33Wo8XaHh/txBjuIXMtgS4 Y9SvBKdMbu5H5BJSumUy3yIdkV5hgz9vDFIn5A3/0FowH78dm5bt2WL1u+rIZhgG PMKXFFmzLr4ioHYDpxDhtPS6D3Xm00dh2ZRU6/5MFPxEVGfkoBLIbqAKXh8j7TgL JpXz7OZkatpsCFPTApo4IGOiporZn4w3sWbicBBdu0W+EI4mbyMVXPzPHrVad+yS qKruoFnZD33E+FWAZS1IBRGXoqBJbsa3JAGfh5wjPQ687WR2RcIvNJw7N/q1Ambh UOqvHsr4onb7YKoQsboVPJ+Q+kQnTimIksp59XiTXo42EutvTTw= =AsN2 -----END PGP SIGNATURE----- --bmct6mf4goicw7er--