Iozone: Performance Test of File I/O Version $Revision: 3.420 $ Compiled for 64 bit mode. Build: freebsd 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: Sat Nov 23 05:13:59 2013 Excel chart generation enabled Record Size 128 KB File size set to 16777216 KB CPU utilization Resolution = 0.000 seconds. CPU utilization Excel chart enabled Command line used: iozone -R -l 8 -u 8 -r 128k -s 16384m -+u -F /data/0 /data/1 /data/2 /data/3 /data/4 /data/5 /data/6 /data/7 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. Min process = 8 Max process = 8 Throughput test with 8 processes Each process writes a 16777216 Kbyte file in 128 Kbyte records Children see throughput for 8 initial writers = 497817.21 KB/sec Parent sees throughput for 8 initial writers = 481353.21 KB/sec Min throughput per process = 60812.71 KB/sec Max throughput per process = 63396.01 KB/sec Avg throughput per process = 62227.15 KB/sec Min xfer = 16093568.00 KB CPU Utilization: Wall time 270.807 CPU time 58.883 CPU utilization 21.74 % Children see throughput for 8 rewriters = 477291.55 KB/sec Parent sees throughput for 8 rewriters = 453293.25 KB/sec Min throughput per process = 58606.59 KB/sec Max throughput per process = 61363.39 KB/sec Avg throughput per process = 59661.44 KB/sec Min xfer = 16023552.00 KB CPU utilization: Wall time 273.412 CPU time 41.123 CPU utilization 15.04 % Children see throughput for 8 readers = 1122000.50 KB/sec Parent sees throughput for 8 readers = 1121984.02 KB/sec Min throughput per process = 139570.39 KB/sec Max throughput per process = 141800.22 KB/sec Avg throughput per process = 140250.06 KB/sec Min xfer = 16513408.00 KB CPU utilization: Wall time 118.317 CPU time 24.224 CPU utilization 20.47 % Children see throughput for 8 re-readers = 1124022.00 KB/sec Parent sees throughput for 8 re-readers = 1123997.60 KB/sec Min throughput per process = 139619.98 KB/sec Max throughput per process = 141912.28 KB/sec Avg throughput per process = 140502.75 KB/sec Min xfer = 16506496.00 KB CPU utilization: Wall time 118.225 CPU time 23.696 CPU utilization 20.04 % Children see throughput for 8 reverse readers = 1715017.12 KB/sec Parent sees throughput for 8 reverse readers = 1714976.40 KB/sec Min throughput per process = 213161.25 KB/sec Max throughput per process = 217172.11 KB/sec Avg throughput per process = 214377.14 KB/sec Min xfer = 16467840.00 KB CPU utilization: Wall time 77.256 CPU time 21.267 CPU utilization 27.53 % Children see throughput for 8 stride readers = 1436130.30 KB/sec Parent sees throughput for 8 stride readers = 1436102.55 KB/sec Min throughput per process = 178664.72 KB/sec Max throughput per process = 181429.08 KB/sec Avg throughput per process = 179516.29 KB/sec Min xfer = 16521984.00 KB CPU utilization: Wall time 92.475 CPU time 21.775 CPU utilization 23.55 % Children see throughput for 8 random readers = 1387792.25 KB/sec Parent sees throughput for 8 random readers = 1387749.10 KB/sec Min throughput per process = 172222.12 KB/sec Max throughput per process = 175923.70 KB/sec Avg throughput per process = 173474.03 KB/sec Min xfer = 16424448.00 KB CPU utilization: Wall time 95.369 CPU time 22.301 CPU utilization 23.38 % Avg throughput per process = 62227.15 KB/sec Min xfer = 16093568.00 KB CPU Utilization: Wall time 270.807 CPU time 58.883 CPU utilization 21.74 % Children see throughput for 8 rewriters = 477291.55 KB/sec Parent sees throughput for 8 rewriters = 453293.25 KB/sec Min throughput per process = 58606.59 KB/sec Max throughput per process = 61363.39 KB/sec Avg throughput per process = 59661.44 KB/sec Min xfer = 16023552.00 KB CPU utilization: Wall time 273.412 CPU time 41.123 CPU utilization 15.04 % Children see throughput for 8 readers = 1122000.50 KB/sec Parent sees throughput for 8 readers = 1121984.02 KB/sec Min throughput per process = 139570.39 KB/sec Max throughput per process = 141800.22 KB/sec Avg throughput per process = 140250.06 KB/sec Min xfer = 16513408.00 KB CPU utilization: Wall time 118.317 CPU time 24.224 CPU utilization 20.47 % Children see throughput for 8 re-readers = 1124022.00 KB/sec Parent sees throughput for 8 re-readers = 1123997.60 KB/sec Min throughput per process = 139619.98 KB/sec Max throughput per process = 141912.28 KB/sec Avg throughput per process = 140502.75 KB/sec Min xfer = 16506496.00 KB CPU utilization: Wall time 118.225 CPU time 23.696 CPU utilization 20.04 % Children see throughput for 8 reverse readers = 1715017.12 KB/sec Parent sees throughput for 8 reverse readers = 1714976.40 KB/sec Min throughput per process = 213161.25 KB/sec Max throughput per process = 217172.11 KB/sec Avg throughput per process = 214377.14 KB/sec Min xfer = 16467840.00 KB CPU utilization: Wall time 77.256 CPU time 21.267 CPU utilization 27.53 % Children see throughput for 8 stride readers = 1436130.30 KB/sec Parent sees throughput for 8 stride readers = 1436102.55 KB/sec Min throughput per process = 178664.72 KB/sec Max throughput per process = 181429.08 KB/sec Avg throughput per process = 179516.29 KB/sec Min xfer = 16521984.00 KB CPU utilization: Wall time 92.475 CPU time 21.775 CPU utilization 23.55 % Children see throughput for 8 random readers = 1387792.25 KB/sec Parent sees throughput for 8 random readers = 1387749.10 KB/sec Min throughput per process = 172222.12 KB/sec Max throughput per process = 175923.70 KB/sec Avg throughput per process = 173474.03 KB/sec Min xfer = 16424448.00 KB CPU utilization: Wall time 95.369 CPU time 22.301 CPU utilization 23.38 % Children see throughput for 8 mixed workload = 515255.71 KB/sec Parent sees throughput for 8 mixed workload = 492301.75 KB/sec Min throughput per process = 17676.29 KB/sec Max throughput per process = 114791.40 KB/sec Avg throughput per process = 64406.96 KB/sec Min xfer = 2584064.00 KB CPU utilization: Wall time 151.308 CPU time 24.712 CPU utilization 16.33 % Children see throughput for 8 random writers = 459373.02 KB/sec Parent sees throughput for 8 random writers = 433159.18 KB/sec Min throughput per process = 55025.73 KB/sec Max throughput per process = 59867.09 KB/sec Avg throughput per process = 57421.63 KB/sec Min xfer = 15420416.00 KB CPU utilization: Wall time 295.313 CPU time 66.378 CPU utilization 22.48 % Children see throughput for 8 pwrite writers = 494440.49 KB/sec Parent sees throughput for 8 pwrite writers = 462746.74 KB/sec Min throughput per process = 59595.11 KB/sec Max throughput per process = 65226.93 KB/sec Avg throughput per process = 61805.06 KB/sec Min xfer = 15328640.00 KB CPU utilization: Wall time 272.396 CPU time 60.462 CPU utilization 22.20 % Children see throughput for 8 pread readers = 1116138.08 KB/sec Parent sees throughput for 8 pread readers = 1116127.00 KB/sec Min throughput per process = 138935.39 KB/sec Max throughput per process = 139916.45 KB/sec Avg throughput per process = 139517.26 KB/sec Min xfer = 16659584.00 KB CPU utilization: Wall time 119.910 CPU time 23.720 CPU utilization 19.78 % Children see throughput for 8 fwriters = 501687.19 KB/sec Parent sees throughput for 8 fwriters = 488539.89 KB/sec Min throughput per process = 61524.95 KB/sec Max throughput per process = 64177.54 KB/sec Avg throughput per process = 62710.90 KB/sec Min xfer = 16777216.00 KB CPU utilization: Wall time 272.690 CPU time 62.307 CPU utilization 22.85 % Children see throughput for 8 freaders = 1113525.17 KB/sec Parent sees throughput for 8 freaders = 1108933.43 KB/sec Min throughput per process = 138619.47 KB/sec Max throughput per process = 139399.89 KB/sec Avg throughput per process = 139190.65 KB/sec Min xfer = 16777216.00 KB CPU utilization: Wall time 121.031 CPU time 32.532 CPU utilization 26.88 % "Throughput report Y-axis is type of test X-axis is number of processes" "Record size = 128 Kbytes " "Output is in Kbytes/sec" " Initial write " 497817.21 " Rewrite " 477291.55 " Read " 1122000.50 " Re-read " 1124022.00 " Reverse Read " 1715017.12 " Stride read " 1436130.30 " Random read " 1387792.25 " Mixed workload " 515255.71 " Random write " 459373.02 " Pwrite " 494440.49 " Pread " 1116138.08 " Fwrite " 501687.19 " Fread " 1113525.17 "CPU utilization report Y-axis is type of test X-axis is number of processes" "Record size = 128 Kbytes " "Output is in CPU%" " Initial write " 21.74 " Rewrite " 15.04 " Read " 20.47 " Re-read " 20.04 " Reverse Read " 27.53 " Stride read " 23.55 " Random read " 23.38 " Mixed workload " 16.33 " Random write " 22.48 " Pwrite " 22.20 " Pread " 19.78 " Fwrite " 22.85 " Fread " 26.88