Am Donnerstag, 2. August 2012 schrieb Marc MERLIN: > So, doctor, is it bad? :) > > randomwrite: (g=0): rw=randwrite, bs=2K-16K/2K-16K, ioengine=libaio, iodepth=64 > sequentialwrite: (g=1): rw=write, bs=2K-16K/2K-16K, ioengine=libaio, iodepth=64 > randomread: (g=2): rw=randread, bs=2K-16K/2K-16K, ioengine=libaio, iodepth=64 > sequentialread: (g=3): rw=read, bs=2K-16K/2K-16K, ioengine=libaio, iodepth=64 > 2.0.8 > Starting 4 processes > randomwrite: Laying out IO file(s) (1 file(s) / 2048MB) > Jobs: 1 (f=1): [___R] [100.0% done] [558.8M/0K /s] [63.8K/0 iops] [eta 00m:00s] > randomwrite: (groupid=0, jobs=1): err= 0: pid=7193 > write: io=102048KB, bw=1700.8KB/s, iops=189 , runt= 60003msec > slat (usec): min=21 , max=219834 , avg=5250.91, stdev=5936.55 > clat (usec): min=25 , max=738932 , avg=329339.45, stdev=106004.63 > lat (msec): min=4 , max=751 , avg=334.59, stdev=107.57 > clat percentiles (msec): Heck, I didn´t look at the IOPS figure! 189 IOPS for a SATA-600 SSD. Thats pathetic. So again, please test this without dm_crypt. I can´t believe that this is the maximum the hardware is able to achieve. A really fast 15000 rpm SAS harddisk might top that. -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
