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[80.230.34.155]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-482e2973d57sm82153325e9.18.2026.02.01.23.50.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Feb 2026 23:50:30 -0800 (PST) Date: Mon, 2 Feb 2026 02:50:28 -0500 From: "Michael S. Tsirkin" To: Pierrick Bouvier Cc: qemu-devel@nongnu.org, qemu-ppc@nongnu.org, Philippe =?iso-8859-1?Q?Mathieu-Daud=E9?= , Stefano Garzarella , Harsh Prateek Bora , Nicholas Piggin , Stefan Hajnoczi Subject: Re: [PATCH 2/6] include/hw/virtio/virtio-access.h: remove target specifics define Message-ID: <20260202024813-mutt-send-email-mst@kernel.org> References: <20260131020100.1115203-1-pierrick.bouvier@linaro.org> <20260131020100.1115203-3-pierrick.bouvier@linaro.org> <20260131124842-mutt-send-email-mst@kernel.org> <095a1def-1548-4764-84d2-87ffb642bb8e@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <095a1def-1548-4764-84d2-87ffb642bb8e@linaro.org> Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Sun, Feb 01, 2026 at 05:24:03PM -0800, Pierrick Bouvier wrote: > On 1/31/26 9:48 AM, Michael S. Tsirkin wrote: > > On Fri, Jan 30, 2026 at 06:00:56PM -0800, Pierrick Bouvier wrote: > > > Signed-off-by: Pierrick Bouvier > > > > Performance impact? > > > > the reason we have these is for performance ... > > > > I would be very happy to run any benchmark that you might judge critical. > > Should we run a disk read/write sequence with a virtio disk, or a download > with a virtio interface? Any other idea? block for sure, people who care about network perf go the vhost or vhost user path. So I CC'd Stefan Hajnoczi. Stefan do you feel this needs a test and what kind of test do you suggest as the most representative of I/O overhead? > > Regards, > Pierrick