Code: Select all
speedo 6# diskperf -W -D -n "Seagate 15K.5 ST3146855LC" /tmp/junk
#---------------------------------------------------------
# Disk Performance Test Results Generated By Diskperf V1.2
#
# Test name : Seagate 15K.5 ST3146855LC
# Test date : Tue Apr 12 10:14:06 2011
# Test machine : IRIX64 speedo 6.5 07202013 IP35
# Test type : XFS data subvolume
# Test path : /tmp/junk
# Request sizes : min=16384 max=16777216
# Parameters : direct=1 time=10 scale=1.000 delay=0.000
# XFS file size : 1334837248 bytes
#---------------------------------------------------------
# req_size fwd_wt fwd_rd bwd_wt bwd_rd rnd_wt rnd_rd
# (bytes) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s)
#---------------------------------------------------------
16384 62.07 66.62 35.24 9.52 10.02 4.66
32768 87.24 92.08 58.06 20.17 18.27 8.77
65536 108.70 112.41 82.84 29.20 32.74 15.43
131072 125.60 127.85 105.22 42.91 49.16 25.51
262144 133.23 134.14 103.35 43.14 65.49 37.95
524288 133.11 134.05 69.45 48.13 70.08 49.63
1048576 133.24 134.07 87.46 64.42 92.10 58.71
2097152 133.38 133.86 105.76 85.87 108.15 84.13
4194304 133.08 129.22 126.07 112.45 118.59 107.74
8388608 132.15 112.59 127.00 113.20 125.83 112.33
16777216 128.94 115.45 130.27 113.94 129.32 114.11
The dip in bwd_wt at 512K/1024K is reproducible, but it's still a nice improvement
