Yeah but why is it using one cpu for encryption? I got 6 encrypted block devices. When writing to them, all cpu cores are used for encryption, therefor it's fast. When reading, it seems to use 1 cpu for all 6 crypto threads? Am 09/15/2011 12:45 PM, schrieb Milan Broz: > On 09/15/2011 11:49 AM, Nikolay Kichukov wrote: >> Hi, >> this query is best suited for md-raid mailing list as what you measure: >> >> dd if=/dev/md3 of=/dev/null bs=1M >> >> does not involve any decryption. You are reading directly from the md device and there is no matter what is actually there. > heh. I read that as crypt device and it is MD directly, sorry for confusion. > Seems my brain is still in different timezone :) > > yes, this test has nothing to do with crypt. > > Anyway, it is interesting that the problem is there even without crypt, > perhaps you should ask on linux-raid list then. > > for badblock - I guess it just submits all IO from one cpu, > so only one core is used for encryption in fact. There applies the same what I wrote before. > > Milan _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
