Cameron Harr wrote:
Vladislav Bolkhovitin wrote:
I guess, you use a regular caching IO? The lowest packet size it
can produce is a PAGE_SIZE (4K). Target can't change it. You can
have lower packets only with O_DIRECT or sg interface. But I'm not
sure it will be performance effective.
I do everything with Direct IO, which is automatic when using the
BLOCKIO method in SCST.
I meant on initiator(s), not on the target.
Sorry - but yes, I always run the benchmark apps with direct IO
Then, there's one more reason why we should find out the cause of such
a big variation between runs. Can you repeat all the tests with the
latest SCST SVN trunk/ including SRPT driver with each run for at
least few minutes?
From a little testing, the updated SCST tree doesn't work with the
OFED-1.3.1 SRP stack, though I have gotten it working with the
infiniband drivers in the normal distribution kernel. Shall I use those
modules?
I think, only Vu can answer it.
Also, as I mentioned before, my time is going to be fairly limited for a
while, but I'll try to squeeze this in and will make sure I run for
longer periods of time. I'll also try to calculate an exact end number
based on iop/runtime.
Which backstorage do you use for BLOCKIO?
Fusion IO ioDrive. I generally use 1 or 2, but somtimes up to 4 at a time.
It might be a reason of not stable results. Can you try with NULLIO to
narrow things down a bit?
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