Iozone: Performance Test of File I/O Version $Revision: 3.457 $ 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, Alexey Skidanov. Run began: Fri Jan 5 19:36:05 2018 File size set to 268435456 kB Record Size 512 kB CPU utilization Resolution = 0.000 seconds. CPU utilization Excel chart enabled Command line used: iozone -s256g -r512 -i 0 -i 1 -t 1 -+u 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. Throughput test with 1 process Each process writes a 268435456 kByte file in 512 kByte records Children see throughput for 1 initial writers = 8428576.00 kB/sec Parent sees throughput for 1 initial writers = 8425135.44 kB/sec Min throughput per process = 8428576.00 kB/sec Max throughput per process = 8428576.00 kB/sec Avg throughput per process = 8428576.00 kB/sec Min xfer = 268435456.00 kB CPU Utilization: Wall time 31.848 CPU time 26.299 CPU utilization 82.58 % Children see throughput for 1 rewriters = 7745555.50 kB/sec Parent sees throughput for 1 rewriters = 7725886.09 kB/sec Min throughput per process = 7745555.50 kB/sec Max throughput per process = 7745555.50 kB/sec Avg throughput per process = 7745555.50 kB/sec Min xfer = 268435456.00 kB CPU utilization: Wall time 34.657 CPU time 28.975 CPU utilization 83.61 % Children see throughput for 1 readers = 7975196.00 kB/sec Parent sees throughput for 1 readers = 7975082.02 kB/sec Min throughput per process = 7975196.00 kB/sec Max throughput per process = 7975196.00 kB/sec Avg throughput per process = 7975196.00 kB/sec Min xfer = 268435456.00 kB CPU utilization: Wall time 33.659 CPU time 33.659 CPU utilization 100.00 % Children see throughput for 1 re-readers = 8052096.50 kB/sec Parent sees throughput for 1 re-readers = 8051984.95 kB/sec Min throughput per process = 8052096.50 kB/sec Max throughput per process = 8052096.50 kB/sec Avg throughput per process = 8052096.50 kB/sec Min xfer = 268435456.00 kB CPU utilization: Wall time 33.337 CPU time 33.337 CPU utilization 100.00 %