when "root user" runs 4 HPL(High performance Linpack benchmark program
which is memory intesive, highly dependent on network latency)
processes per node,
"top" shows good cpu affinity and good cpu performance.
but when a general user w/o root privilige runs the same benchmark program,
"top" shows cpu affinity sometimes broken, furthermore sometimes 2 hpl
programs runs the same cpu, after all which gives "poor benchmark
result"
I do not use special kernel parameter on boot, and the followings are
testbed's spec:
system: 4 cpus (2 sockets/ 2 core) opteron 275 blade server
memory nodes: 512MB *2 for a node and 2GB*2 for the other node
OS: RHEL4 update2 w/ kernel 2.6.9-22.ELsmp
network driver: topspin IB implementation
Could you anyone explain about this awkward result?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
