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【读写测试】V100 vs P40

　
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Linux 中用 dd 命令来测试硬盘读写速度

bs=4k

time dd if=0300_r2_v.bmp of=/dev/null bs=4k

V100

657+1 records in
657+1 records out
2693878 bytes (2.7 MB) copied, 0.00119652 s, 2.3 GB/s
dd  of=/dev/null bs=4k  0.00s user 0.00s system 0% cpu 0.042 total

P40

657+1 records in
657+1 records out
2693878 bytes (2.7 MB) copied, 0.000802687 s, 3.4 GB/s
real    0m0.009s
user    0m0.000s
sys     0m0.000s
  • 读取速度
dd if=0300_r2_v.bmp of=/dev/null bs=4k

P40

657+1 records in
657+1 records out
2693878 bytes (2.7 MB) copied, 0.00109334 s, 2.5 GB/s

V100

657+1 records in
657+1 records out
2693878 bytes (2.7 MB) copied, 0.00101956 s, 2.6 GB/s

V100-cq

dd if=0300_r2_v.bmp of=/dev/null bs=4k count=10000
657+1 records in
657+1 records out
2693878 bytes (2.7 MB) copied, 0.00136768 s, 2.6 GB/s

bs=1M

time dd if=0300_r2_v.bmp of=/dev/null bs=1M

V100

2+1 records in
2+1 records out
2693878 bytes (2.7 MB) copied, 0.00205349 s, 1.3 GB/s
dd  of=/dev/null bs=1M  0.00s user 0.00s system 0% cpu 0.104 total

p40

2+1 records in
2+1 records out
2693878 bytes (2.7 MB) copied, 0.00165216 s, 1.6 GB/s

V100-cp

time dd if=0300_r2_v.bmp of=/dev/null bs=1M count=10000
2+1 records in
2+1 records out
2693878 bytes (2.7 MB) copied, 0.000999968 s, 2.7 GB/s

bs=8k

dd if=0300_r2_v.bmp of=/dev/null bs=8k count=10000 iflag=direct

P40

328+1 records in
328+1 records out
2693878 bytes (2.7 MB) copied, 0.310059 s, 8.7 MB/s

V100

328+1 records in
328+1 records out
2693878 bytes (2.7 MB) copied, 2.27056 s, 1.2 MB/s

V100-cq

dd if=0300_r2_v.bmp of=/dev/null bs=8k count=10000 iflag=direct
328+1 records in
328+1 records out
2693878 bytes (2.7 MB) copied, 8.83697 s, 305 kB/s

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