CPU model            : QEMU Virtual CPU version (cpu64-rhel6)
Number of cores      : 4
CPU frequency        : 1999.999 MHz
Total amount of ram  : 512 MB
Total amount of swap : 2048 MB
System uptime        :  37 days, 4:02,

SYNC: 485 msec

4k, 262144 times
262144+0 records in
262144+0 records out
1073741824 bytes (1.1 GB) copied, 20.1489 s, 53.3 MB/s
SYNC: 504 msec

8k, 131072 times
131072+0 records in
131072+0 records out
1073741824 bytes (1.1 GB) copied, 11.6284 s, 92.3 MB/s
SYNC: 360 msec

16k, 65536 times
65536+0 records in
65536+0 records out
1073741824 bytes (1.1 GB) copied, 12.1858 s, 88.1 MB/s
SYNC: 364 msec

32k, 32768 times
32768+0 records in
32768+0 records out
1073741824 bytes (1.1 GB) copied, 11.1203 s, 96.6 MB/s
SYNC: 880 msec

64k, 16384 times
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 19.1815 s, 56.0 MB/s
SYNC: 376 msec

128k, 8192 times
8192+0 records in
8192+0 records out
1073741824 bytes (1.1 GB) copied, 13.3128 s, 80.7 MB/s
SYNC: 529 msec

256k, 4096 times
4096+0 records in
4096+0 records out
1073741824 bytes (1.1 GB) copied, 14.6227 s, 73.4 MB/s
SYNC: 385 msec

16k, 65536 times, 4 parallel
65536+0 records in
65536+0 records out
1073741824 bytes (1.1 GB) copied, 69.3271 s, 15.5 MB/s
65536+0 records in
65536+0 records out
1073741824 bytes (1.1 GB) copied, 71.1255 s, 15.1 MB/s
65536+0 records in
65536+0 records out
1073741824 bytes (1.1 GB) copied, 71.1226 s, 15.1 MB/s
65536+0 records in
65536+0 records out
1073741824 bytes (1.1 GB) copied, 71.0775 s, 15.1 MB/s
SYNC: 644 msec

8k, 65536 times, 8 parallel
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 90.6134 s, 5.9 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 90.5203 s, 5.9 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 90.6125 s, 5.9 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 90.6105 s, 5.9 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 87.7316 s, 6.1 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 88.5653 s, 6.1 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 90.5919 s, 5.9 MB/s
65536+0 records in
65536+0 records out
536870912 bytes (537 MB) copied, 78.5017 s, 6.8 MB/s
SYNC: 561 msec