debian:~# tiobench
No size specified, using 512 MB
Run #1: /usr/bin/tiotest -t 8 -f 64 -r 500 -b 4096 -d . -T-T

Unit information
================
File size = megabytes
Blk Size  = bytes
Rate      = megabytes per second
CPU%      = percentage of CPU used during the test
Latency   = milliseconds
Lat%      = percent of requests that took longer than X seconds
CPU Eff   = Rate divided by CPU% - throughput per cpu load

Sequential Reads
                              File  Blk   Num                   Avg      Maximum      Lat%     Lat%    CPU
Identifier                    Size  Size  Thr   Rate  (CPU%)  Latency    Latency      >2s      >10s    Eff
---------------------------- ------ ----- ---  ------ ------ --------- -----------  -------- -------- -----
2.6.16.18n2100                512   4096    1   21.19 77.70%     0.168      161.49   0.00000  0.00000    27
2.6.16.18n2100                512   4096    2   20.58 84.21%     0.358      144.10   0.00000  0.00000    24
2.6.16.18n2100                512   4096    4   21.90 88.08%     0.598     1095.26   0.00000  0.00000    25
2.6.16.18n2100                512   4096    8   21.76 87.88%     1.134      431.29   0.00000  0.00000    25

Random Reads
                              File  Blk   Num                   Avg      Maximum      Lat%     Lat%    CPU
Identifier                    Size  Size  Thr   Rate  (CPU%)  Latency    Latency      >2s      >10s    Eff
---------------------------- ------ ----- ---  ------ ------ --------- -----------  -------- -------- -----
2.6.16.18n2100                512   4096    1    3.45 19.66%     1.106       21.64   0.00000  0.00000    18
2.6.16.18n2100                512   4096    2    4.22 19.71%     1.747       58.29   0.00000  0.00000    21
2.6.16.18n2100                512   4096    4    4.28 15.35%     2.631      156.82   0.00000  0.00000    28
2.6.16.18n2100                512   4096    8    4.60 22.64%     5.016      461.13   0.00000  0.00000    20

Sequential Writes
                              File  Blk   Num                   Avg      Maximum      Lat%     Lat%    CPU
Identifier                    Size  Size  Thr   Rate  (CPU%)  Latency    Latency      >2s      >10s    Eff
---------------------------- ------ ----- ---  ------ ------ --------- -----------  -------- -------- -----
2.6.16.18n2100                512   4096    1   13.08 91.05%     0.248      159.01   0.00000  0.00000    14
2.6.16.18n2100                512   4096    2   13.36 93.15%     0.479      251.13   0.00000  0.00000    14
2.6.16.18n2100                512   4096    4   13.36 92.91%     0.940      470.32   0.00000  0.00000    14
2.6.16.18n2100                512   4096    8   13.49 93.31%     1.881      900.34   0.00000  0.00000    14

Random Writes
                              File  Blk   Num                   Avg      Maximum      Lat%     Lat%    CPU
Identifier                    Size  Size  Thr   Rate  (CPU%)  Latency    Latency      >2s      >10s    Eff
---------------------------- ------ ----- ---  ------ ------ --------- -----------  -------- -------- -----
2.6.16.18n2100                512   4096    1    1.02 3.645%     0.101        1.47   0.00000  0.00000    28
2.6.16.18n2100                512   4096    2    1.00 3.653%     0.239       60.21   0.00000  0.00000    27
2.6.16.18n2100                512   4096    4    1.14 4.020%     0.340      136.00   0.00000  0.00000    28
2.6.16.18n2100                512   4096    8    1.28 5.081%     0.294      737.72   0.00000  0.00000    25