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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 7/1/20 6:21 AM, Keith Busch wrote: > On Wed, Jul 01, 2020 at 07:36:09AM +0200, Christoph Hellwig wrote: >> On Tue, Jun 30, 2020 at 07:25:15PM -0700, Chaitanya Kulkarni wrote: >>> Hi, >>> >>> This is a small patch-series which replaces ctrl->namespaces with >>> xarray for host-core and target-core. We can see following >>> performance improvement when running fio with 32 parallel jobs where >>> first 16 namespaces and last 16 namespaces are used for I/O. See [1] for >>> detailed performance numbers. >> Why would that make any difference given that we don't look up namespaces >> in the I/O path? > Not in host side. Target does a lookup on each IO through: > > nvmet_req_init() > nvmet_parse_io_cmrd() > nvmet_find_namespaces() > > And this detail should be mentioned in the test setup for the cover > letter, or in patch 2. > Yes I've missed that I'll add these details in V3. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme