Hi, On 8 September 2017 at 01:13, Brandon Schwartz <schwartz.xn@xxxxxxxxx> wrote: > Hi, > > Running the following job file with --io_submit_mode=offload set will > occasionally give a 'No I/O performed by libaio' error > > Using the latest FIO version (fio-3.0-48-g83a9) > > [128k-RR-64k-RW-q1] > filename=/dev/sdb > direct=1 > iodepth=1 > rw=randrw > bs=128k,64k > rwmixread=50 > ioengine=libaio > io_submit_mode=offload > runtime=15m > > After a few minutes of running FIO will exit with the following > message: "No I/O performed by libaio, perhaps try --debug=io option > for details" > > With debug set, I see this near the end of the trace: > > io 7720 io complete: io_u 0x55e10ee4abc0: > off=1304219746304/len=65536/ddir=1io 7720 //dev/sdbio > 7720 > io 7720 fill_io_u: io_u 0x55e10ee4abc0: > off=233107357696/len=0/ddir=0io 7720 //dev/sdbio 7720 That's weird - fio tried to submit a zero length read. How big was your device? -- Sitsofe | http://sucs.org/~sits/ -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
