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| author | Jack Steiner <steiner@sgi.com> | 2006-04-22 09:37:19 -0500 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-04-27 14:29:05 -0700 |
| commit | dd4cb9f8ac9717c9db2b2afc5a82cb95a3d5dec3 (patch) | |
| tree | 94725efb2f8c1fc9272d1599bd7764bab9023228 /CREDITS | |
| parent | f0fe253c4719faf76d40f581cdc0e8aef77273bb (diff) | |
| download | blackbird-op-linux-dd4cb9f8ac9717c9db2b2afc5a82cb95a3d5dec3.tar.gz blackbird-op-linux-dd4cb9f8ac9717c9db2b2afc5a82cb95a3d5dec3.zip | |
[IA64-SGI] - Reduce overhead of reading sn_topology
MPI programs using certain debug options have a long
startup time. This was traced to a "vmalloc/vfree" in
the code that reads /proc/sgi_sn/sn_topology. On large
systems, vfree requires an IPI to all cpus to do TLB
purging.
Replace the vmalloc/vfree with kmalloc/kfree. Although
the size of the structure being allocated is unknown, it
will not not exceed 96 bytes.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions
