Commit 5cfccd7f authored by Nick Piggin's avatar Nick Piggin Committed by Paul Mackerras

[PATCH] powerpc: Fix database regression due to scheduler changes

PowerPC's NUMA domain doesn't currently set up some of the newer
sched-domains parameters.

Brian Twichell <tbrian@us.ibm.com> discovered and diagnosed a 1.5% OLTP
database regression on a 4 core POWER5 system that was due to the use of
NUMA scheduling on ppc64.

This patch applies some saneish values to the parameters, in line with
other architectures. This solves the regression.
Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 0db169f9
...@@ -41,6 +41,10 @@ static inline int node_to_first_cpu(int node) ...@@ -41,6 +41,10 @@ static inline int node_to_first_cpu(int node)
.cache_hot_time = (10*1000000), \ .cache_hot_time = (10*1000000), \
.cache_nice_tries = 1, \ .cache_nice_tries = 1, \
.per_cpu_gain = 100, \ .per_cpu_gain = 100, \
.busy_idx = 3, \
.idle_id = 1, \
.newidle_idx = 2, \
.wake_idx = 1, \
.flags = SD_LOAD_BALANCE \ .flags = SD_LOAD_BALANCE \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_BALANCE_NEWIDLE \ | SD_BALANCE_NEWIDLE \
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment