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 %