On 02/27/2017 07:22 PM, Xiubo Li wrote: > Hi Mike > > Thanks verrry much for your work and test cases. > > >>>>> From: Xiubo Li <lixiubo@xxxxxxxxxxxxxxxxxxxx> >>>>> >>>>> Currently for the TCMU, the ring buffer size is fixed to 64K cmd >>>>> area + 1M data area, and this will be bottlenecks for high iops. >>> Hi Xiubo, thanks for your work. >>> >>> daynmic -> dynamic >>> >>> Have you benchmarked this patch and determined what kind of iops >>> improvement it allows? Do you see the data area reaching its >>> fully-allocated size? >>> >> I tested this patch with Venky's tcmu-runner rbd aio patches, with one >> 10 gig iscsi session, and for pretty basic fio direct io (64 -256K >> read/writes with a queue depth of 64 numjobs between 1 and 4) tests read >> throughput goes from about 80 to 500 MB/s. > Looks nice. > >> Write throughput is pretty >> low at around 150 MB/s. > What's the original write throughput without this patch? Is it also > around 80 MB/s ? It is around 20-30 MB/s. Same fio args except using --rw=write.
