| commit | 24f287e412ae90de8d281543c8b1043b6ed6c019 | |
| author | David S. Miller <davem@sunset.davemloft.net> | |
| Mon, 15 Oct 2007 23:41:44 +0000 (15 16:41 -0700) | ||
| committer | David S. Miller <davem@sunset.davemloft.net> | |
| Wed, 17 Oct 2007 23:24:55 +0000 (17 16:24 -0700) | ||
| tree | eb69803d187d35fd9e90c1428952c0ed5a0970c1 | treesnapshot (tar.gz zip) |
| parent | d85714d81cc0408daddb68c10f7fd69eafe7c213 | commitdiff |
[SPARC64]: Implement atomic backoff.
When the cpu count is high and contention hits an atomic object, the
processors can synchronize such that some cpus continually get knocked
out and cannot complete the atomic update.
So implement an exponential backoff when SMP.
Signed-off-by: David S. Miller <davem@davemloft.net>
When the cpu count is high and contention hits an atomic object, the
processors can synchronize such that some cpus continually get knocked
out and cannot complete the atomic update.
So implement an exponential backoff when SMP.
Signed-off-by: David S. Miller <davem@davemloft.net>
| arch/sparc64/lib/atomic.S | diffblobblamehistory | |
| arch/sparc64/lib/bitops.S | diffblobblamehistory | |
| include/asm-sparc64/backoff.h | [new file with mode: 0644] | blob |