| commit | dd4cb9f8ac9717c9db2b2afc5a82cb95a3d5dec3 | |
| author | Jack Steiner <steiner@sgi.com> | |
| Sat, 22 Apr 2006 14:37:19 +0000 (22 09:37 -0500) | ||
| committer | Tony Luck <tony.luck@intel.com> | |
| Thu, 27 Apr 2006 21:29:05 +0000 (27 14:29 -0700) | ||
| tree | 94725efb2f8c1fc9272d1599bd7764bab9023228 | treesnapshot (tar.gz zip) |
| parent | f0fe253c4719faf76d40f581cdc0e8aef77273bb | commitdiff |
[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>
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>
| arch/ia64/sn/kernel/sn2/sn_hwperf.c | diffblobblamehistory |