Iozone: Performance Test of File I/O Version $Revision: 3.429 $ Compiled for 32 bit mode. Build: linux Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa. Run began: Mon May 1 17:59:27 2017 Include fsync in write timing O_DIRECT feature enabled Auto Mode File size set to 102400 kB Record Size 4 kB Record Size 16 kB Record Size 512 kB Record Size 1024 kB Record Size 16384 kB Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 102400 4 1995 2412 7493 7425 7370 785 102400 16 7235 7389 15266 14869 14036 107 102400 512 9012 11632 22231 22232 22227 2602 102400 1024 8982 11655 22476 22476 22474 5198 102400 16384 9345 11751 23038 23036 19889 10371 iozone test complete. 4 KiB from . (ext4 /dev/mmcblk0p1): request=1 time=1.50 ms 4 KiB from . (ext4 /dev/mmcblk0p1): request=2 time=738 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=3 time=659 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=4 time=727 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=5 time=677 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=6 time=665 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=7 time=650 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=8 time=652 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=9 time=655 us 4 KiB from . (ext4 /dev/mmcblk0p1): request=10 time=690 us --- . (ext4 /dev/mmcblk0p1) ioping statistics --- 10 requests completed in 9.01 s, 1.31 k iops, 5.13 MiB/s min/avg/max/mdev = 650 us / 761 us / 1.50 ms / 248 us test: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=64 fio-2.1.11 Starting 1 process test: Laying out IO file(s) (1 file(s) / 100MB) test: (groupid=0, jobs=1): err= 0: pid=2167: Mon May 1 18:24:38 2017 read : io=76764KB, bw=1583.3KB/s, iops=395, runt= 48486msec write: io=25636KB, bw=541419B/s, iops=132, runt= 48486msec cpu : usr=1.24%, sys=4.02%, ctx=24937, majf=0, minf=10 IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.1%, >=64=99.8% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.1%, >=64=0.0% issued : total=r=19191/w=6409/d=0, short=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=64 Run status group 0 (all jobs): READ: io=76764KB, aggrb=1583KB/s, minb=1583KB/s, maxb=1583KB/s, mint=48486msec, maxt=48486msec WRITE: io=25636KB, aggrb=528KB/s, minb=528KB/s, maxb=528KB/s, mint=48486msec, maxt=48486msec Disk stats (read/write): mmcblk0: ios=18460/6303, merge=594/72, ticks=2270620/768900, in_queue=3044460, util=99.94%