Prev: tty: implement BTM as mutex instead of BKL
Next: [01/45] UBI: fix volume creation input checking
From: Greg KH on 30 Mar 2010 19:10
2.6.27-stable review patch. If anyone has any objections, please let us know.

------------------

From: Ingo Molnar <mingo(a)elte.hu>

commit 52c642f33b14bfa1b00ef2b68296effb34a573f3 upstream.

fine-tune the HT sched-domains parameters as well.

On a HT capable box, this increases lat_ctx performance from 23.87
usecs to 1.49 usecs:

# before

$ ./lat_ctx -s 0 2

"size=0k ovr=1.89
2 23.87

# after

$ ./lat_ctx -s 0 2

"size=0k ovr=1.84
2 1.49

Signed-off-by: Ingo Molnar <mingo(a)elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
include/linux/topology.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -99,7 +99,7 @@ void arch_update_cpu_topology(void);
| SD_BALANCE_FORK \
| SD_BALANCE_EXEC \
| SD_WAKE_AFFINE \
- | SD_WAKE_IDLE \
+ | SD_WAKE_BALANCE \
| SD_SHARE_CPUPOWER, \
.last_balance = jiffies, \
.balance_interval = 1, \


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: tty: implement BTM as mutex instead of BKL
Next: [01/45] UBI: fix volume creation input checking