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| author | Guy Shapiro <guysh@mellanox.com> | 2015-04-15 18:17:56 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-05-05 16:18:02 +0300 |
| commit | c1d383b5785b1e0fb5fb862864712a7208219e6a (patch) | |
| tree | ac3eb2c7467890e8665508c28b5b5c517b5a0e83 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 5b6b8fe64053b2649660ded2f3c5be25ebddbfdb (diff) | |
| download | linux-c1d383b5785b1e0fb5fb862864712a7208219e6a.tar.xz | |
IB/core: dma map/unmap locking optimizations
Currently, while mapping or unmapping pages for ODP, the umem mutex is locked
and unlocked once for each page. Such lock/unlock operation take few tens to
hundreds of nsecs. This makes a significant impact when mapping or unmapping few
MBs of memory.
To avoid this, the mutex should be locked only once per operation, and not per
page.
Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Acked-by: Shachar Raindel <raindel@mellanox.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions