On 04/12/2010 12:52 AM, john terragon wrote: > My system has a core i5 520M and supports AES-NI. I wanted to do a > rude performance test and so I ran these commands on a small (4GB) partition and on the dm-crypt device backed by it: > > 1) using the aesni-intel module: dd if=/dev/dev/mapper/vol of=/dev/null bs=4k > 2) using only the generic aes-x86_64 module: dd if=/dev/dev/mapper/vol > of=/dev/null bs=4k > 3) dd if=/dev/sda4 of=/dev/null bs=4k > > What I got kind of surprised me: > 1) ~ 67 MB/sec, with a low cpu load by kcryptd > 2) ~ 79 MB/sec, with a higher cpu load by kcryptd > 3) ~ 81 MB/sec Just curious - is it the same if you add iflag=direct? Also try larger block size bs=1M etc. Milan -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
