On Dec 29, 2006, at 2:01 PM, Pete Wyckoff wrote:
[EMAIL PROTECTED] wrote on Fri, 29 Dec 2006 13:35 -0500:
Do these require the kernel module? I have not tried using that yet.
Nope, but you need to figure out MPI.
MPI, we have many in house to play with. ;-)
I asked about the module because of the "-f pvfs2:/pvfs-ib/x1" in:
mpiexec -n 1 2402/perf -n 10 -s 800m -c 100m -f pvfs2:/pvfs-ib/x1
I assumed it meant use the file stored on a PVFS mount. I'll look
into this app.
BMI_OPTIMISTIC_BUFFER_REG.
What does this do? Internally, MX can cache some registrations (the
API does not expose it). It is in my best interest to try to reuse
buffers.
Just chunks up the memory registrations. If you don't have an MX API
knob for it, you'll never be able to use it. Very handy for IB to
amortize registration overhead though.
Let us know if you manage to figure out why you're not getting good
MX performance. Perhaps these other tests can shed some light. You
might look at detailed server or client logs with usec timestamps to
figure out where the time is going. And oprofile may be useful if
you think the time is going to the MX libs or driver, or pthread
overhead.
-- Pete
That is next on my list. Patrick suggested prof since both sides are
in user-space. I have oprofile compiled but I do not have a valid
vmlinux (it would require a new kernel compile and install).
Scott
_______________________________________________
Pvfs2-developers mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
