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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-09-01 10:34:35 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-04 10:09:54 +0200
commita52bfd73589eaf88d9c95ad2c1de0b38a6b27972 (patch)
tree33cee609a46624525abf1643d71d0fbc79e25f87 /include/linux
parentcc9fba7d7672fa3ed58d9d9ecb6c45b1351c29a6 (diff)
sched: Add smt_gain
The idea is that multi-threading a core yields more work capacity than a single thread, provide a way to express a static gain for threads. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Tested-by: Andreas Herrmann <andreas.herrmann3@amd.com> Acked-by: Andreas Herrmann <andreas.herrmann3@amd.com> Acked-by: Gautham R Shenoy <ego@in.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> LKML-Reference: <20090901083826.073345955@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/sched.h1
-rw-r--r--include/linux/topology.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 651dded25720..9c81c921acb3 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -921,6 +921,7 @@ struct sched_domain {
unsigned int newidle_idx;
unsigned int wake_idx;
unsigned int forkexec_idx;
+ unsigned int smt_gain;
int flags; /* See SD_* */
enum sched_domain_level level;
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 7402c1a27c4f..6203ae5067ce 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -99,6 +99,7 @@ int arch_update_cpu_topology(void);
| SD_SHARE_CPUPOWER, \
.last_balance = jiffies, \
.balance_interval = 1, \
+ .smt_gain = 1178, /* 15% */ \
}
#endif
#endif /* CONFIG_SCHED_SMT */