From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH 0/2] Introduce the request handling for dm-crypt Date: Thu, 12 Nov 2015 15:02:38 +0000 Message-ID: <20151112150238.GO12392@sirena.org.uk> References: <20151112122400.GB27454@quack.suse.cz> <4436790.rotQ3a7v5c@wuerfel> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="fjEAjMKpll6GDq3U" Return-path: Content-Disposition: inline In-Reply-To: <4436790.rotQ3a7v5c@wuerfel> Sender: linux-raid-owner@vger.kernel.org To: Arnd Bergmann Cc: Baolin Wang , Jan Kara , Christoph Hellwig , axboe@kernel.dk, Alasdair G Kergon , Mike Snitzer , dm-devel@redhat.com, neilb@suse.com, tj@kernel.org, jmoyer@redhat.com, keith.busch@intel.com, bart.vanassche@sandisk.com, linux-raid@vger.kernel.org, "Garg, Dinesh" , LKML List-Id: linux-raid.ids --fjEAjMKpll6GDq3U Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Nov 12, 2015 at 01:57:27PM +0100, Arnd Bergmann wrote: > On Thursday 12 November 2015 20:51:10 Baolin Wang wrote: > > But it maybe not enough for HW engine which can handle maybe 10M/20M > > at one time. > Given that you have already done measurements, can you find out how much > you lose in overall performance with your existing patch if you artificially > limit the maximum size to sizes like 256kb, 1MB, 4MB, ...? It's probably also worth looking at the impact on CPU utilisation as well as throughput in your benchmarking since the system will often not be idle when it's doing a lot of I/O - I know you've done some measurements in that area before, including them when looking at block sizes might be interesting. --fjEAjMKpll6GDq3U Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJWRKoNAAoJECTWi3JdVIfQkDUH/1ejU/OKvam0bizZOlfRzzUj sUyIiR+fv0kNMvIc38Us12nb4XwI1mz3TPIGJhJ1iozHU8xI7YaZaKmq0+uyCDwS FB8baE5gNASI+nTJ+K7g0YzEA3HkSoZi9JbRohO/IzBL7m/X+WhJoDFSunX9FKx8 2k65EGXkA5Ggpz6DqlamMpuYjS8zTr6uYhTVvhasb6m07Yxi0HYQKjHz7USR/7K7 EQMRVk/6Htc2OiH9Y87jo1n3Y3YNIF3UFr8dw5XCFIdDXuNJ1Pb6R7d5LN+AR+LG 9T0ppoj08J8zmJWC3n0BJu3RDUFPj7qqPp34uhKMur+OFpWAh0oXAgJmXRWc4iQ= =Uc/H -----END PGP SIGNATURE----- --fjEAjMKpll6GDq3U--