a fileio bug

[trgfree]

@akopytov check up the command, the intermediate reports show reads data but not writes, I can give you a tip, it's affected by --file-io-mode=async ,because without this option, it's right.

[root@144]/ssddata/sysbench# sysbench fileio --file-total-size=200G --file-num=100 --file-block-size=4096 --threads=32 --report-interval=60 --time=1200 --warmup-time=60 --file-test-mode=rndwr --file-io-mode=async run sysbench 1.1.0-d724133 (using bundled LuaJIT 2.1.0-beta3)

Running the test with following options: Number of threads: 32 Warmup time: 60s Report intermediate results every 60 second(s) Initializing random number generator from current time

Extra file open flags: 0 100 files, 2GiB each 200GiB total file size Block size 4KiB Number of IO requests: 0 Read/Write ratio for combined random IO test: 1.50 Periodic FSYNC enabled, calling fsync() each 100 requests. Calling fsync() at the end of test, Enabled. Using asynchronous I/O mode Doing random write test Initializing worker threads...

Threads started!

Warming up for 60 seconds...

[ 60s ] reads: 563.39 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 120s ] reads: 566.71 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 180s ] reads: 565.79 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 240s ] reads: 567.06 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.517 [ 300s ] reads: 566.49 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 360s ] reads: 566.65 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 420s ] reads: 566.82 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 480s ] reads: 566.59 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.517 [ 540s ] reads: 566.37 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.517 [ 600s ] reads: 566.64 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 660s ] reads: 566.98 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 720s ] reads: 565.88 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 780s ] reads: 567.17 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 840s ] reads: 566.89 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 900s ] reads: 566.44 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 960s ] reads: 565.82 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 1020s ] reads: 566.58 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.517 [ 1080s ] reads: 566.87 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.517 [ 1140s ] reads: 566.52 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527 [ 1200s ] reads: 565.40 MiB/s writes: 0.00 MiB/s fsyncs: 0.00/s latency (ms,95%): 0.527

File operations: reads/s: 0.00 writes/s: 145013.06 fsyncs/s: 0.00

Throughput: read, MiB/s: 566.46 write, MiB/s: 0.00

General statistics: total time: 1200.0582s total number of events: 348045035

Latency (ms): min: 0.00 avg: 0.11 max: 17.04 95th percentile: 0.53 sum: 37831115.39

Threads fairness: events (avg/stddev): 10876361.9375/57954.21 execution time (avg/stddev): 1182.2224/0.12

[akopytov]

Thanks. Should be fixed in 'master'.