From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5FEFD136349; Mon, 16 Jun 2025 21:25:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750109153; cv=none; b=oGy7eC6aLhd193LD7a6ZranxXfDIBxqHZ++o/7Bn2v/D20SBznqgJMncB4RPODMAhAJNW/r0rrjM4Xw65vwFifVmqWQLQtIYl64oJuUTUmTVoB6Vq2EOjEviG9zllPAZA1VDTnmm1QNO1M6Bgc9RBc58TXeUm/CZgI4K71WCvxM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750109153; c=relaxed/simple; bh=0kYeZiVaYQJlDMo+2AJELjaqnqjC9u7JSXwvaUyPgyE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qbnN8vshIHiwCHpkMDXiBg92cCnI8si7kdJuVt7xbec89/vGJYjKbr68EZWlJjqbILujTmAdXF8pIxU9lvzxiT2J93XU5ZtcnkSvgQDd36YRZF+oQJ4kAE5EdtOXnFPOc1iJUz+UVW1plBi8kEyiUJfwWR5Lf/3IUzPOyGBQhCE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GCU8UjnP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GCU8UjnP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71296C4CEEA; Mon, 16 Jun 2025 21:25:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750109151; bh=0kYeZiVaYQJlDMo+2AJELjaqnqjC9u7JSXwvaUyPgyE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GCU8UjnPn2USt+7Xz/zM5pOJJHEVfj6ASltAZDneDkoE5Y6CJ2yb/oCuZwhDFMb+f gHgZQ31+YCH7klDcVql7CTSffdvda/BD5QoNLV6bu1KFLX4qC4z76dT2PqycmmYagx 0aVQjWwgBvFSRvbxF/IF8jVmaQjZZAtb14E8uGDY9M+OZhQw3ELvrnJJNPeLowMlbB +ZmMzxGpeA/Ha9BSWrWAd4wO/yhvXdGEnu3ZDQVTRZcvkO1w9AKz5Sv8SzvllnMjZA s1oWc3WILj6jWrR410zfYlKPTOwndaKssY6jI72WmD6IdcVBBl3WAGTLxEOeY5hAZL 3eAm59tlpaHSA== Date: Mon, 16 Jun 2025 21:25:49 +0000 From: Eric Biggers To: Giovanni Cabiddu Cc: Herbert Xu , linux-crypto@vger.kernel.org, qat-linux@intel.com, stable@vger.kernel.org Subject: Re: [PATCH] crypto: qat - lower priority for skcipher and aead algorithms Message-ID: <20250616212549.GB23807@google.com> References: <20250613103309.22440-1-giovanni.cabiddu@intel.com> <20250616164752.GB1373@sol> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250616164752.GB1373@sol> On Mon, Jun 16, 2025 at 09:47:52AM -0700, Eric Biggers wrote: > FWIW, on an AMD EPYC 9B45 (Zen 5 / Turin) server processor, I get 35.2 GB/s. > This processor appeared to run at about 4.15 GHz, so that's about 8.5 bytes per > cycle. That's 51% more bytes per cycle than Intel. This shows that there is > still room for improvement in VAES, even when it's already much better than QAT. Also, to be clear, the 35.2 GB/s (and the corresponding bytes/cycle number of 8.5) is single-thread throughput. This should have been clear since I compared it to the single-thread throughput on Emerald Rapids. But I just wanted to make sure to state it explicitly, as an earlier part of my email discussed whole-processor throughput which it could be confused with. - Eric