It turns out that a change I made to the code caused the error. lfsr works. Thank you Alex. On Tue, Aug 20, 2013 at 12:37 AM, Alex Pyrgiotis <apyrgio@xxxxxxxx> wrote: > On 08/20/2013 02:11 AM, Juan Casse wrote: >> Hi, >> >> How is LFSR used? >> >> When running the job file: >> >> [global] >> readwrite=randwrite >> size=64k >> bs=8192 >> random_generator=lfsr >> [test_job] >> >> fio returns: >> >> "fio: failed allocating random map. If running a large number of jobs, >> try the 'norandommap' option or set 'softrandommap'. Or give a larger >> --alloc-size to fio." >> >> I tried the recommendations in the message above to no avail. I also >> tried other combinations of size, bs, and readwrite. > > Hi Juan, > > Could you provide the fio version you are using (fio -v)? I'm currently > using the latest version from git and I don't see these results. > Specifically, what I'm getting is: > > ------------------------------- > test_job: (g=0): rw=randwrite, bs=8K-8K/8K-8K/8K-8K, ioengine=sync, > iodepth=1 > fio-2.1.2-13-g3e10 > Starting 1 process > Value is 7 > Value is 6 > Value is 4 > Value is 0 > Value is 1 > Value is 5 > Value is 2 > Value is 3 > > test_job: (groupid=0, jobs=1): err= 0: pid=24672: Tue Aug 20 10:27:28 2013 > write: io=65536B, bw=64000KB/s, iops=8000, runt= 1msec > clat (usec): min=6, max=43, avg=11.50, stdev=12.75 > lat (usec): min=7, max=44, avg=11.88, stdev=12.99 > clat percentiles (usec): > <...snip...> > lat (usec) : 10=87.50%, 50=12.50% > cpu : usr=0.00%, sys=0.00%, ctx=16, majf=0, minf=41 > <...snip...> > > Run status group 0 (all jobs): > WRITE: io=64KB, aggrb=64000KB/s, minb=64000KB/s, maxb=64000KB/s, > mint=1msec, maxt=1msec > > Disk stats (read/write): > sda: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00% > ------------------------------- > > The output has been cut in some parts for readability reasons. Also, the > "Value is..." lines have been added to show which blocks fio is hitting. > > Regards, > Alex > > -- > Alex | apyrgio@xxxxxxxx -- 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
