On Mon, 2011-01-10 at 12:19 -0500, Mikulas Patocka wrote: > Try this patch. Hi, just compiled it on top of 2.6.37 without the fb1e753 and ran seeker [1] for 100 seconds: raw disk: 0.2173ms fb1e753 patch: 0.2643ms your patch: 0.2676ms Throughput is within 5% of max, even with the 10ms access time. On Mon, 2011-01-10 at 18:50 +0100, Milan Broz wrote: > We can now process ios in parallel on different CPUs, that code will > rewrite the context struct on every IO and at least it will cause cache bouncing. I should say that those numbers come from a CRYPTO_PCRYPT=n kernel. Anyone got an idea for a good testcase? I tried replicating the issues with with a loop'd file on a tmpfs and failed. Using a usb-attached HDD also didn't work. Michael [1] http://www.linuxinsight.com/how_fast_is_your_disk.html -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
