Provide an powerpc architecture specific implementation for defining the
turbo domain to make searching of the core to be bound within the NUMA.
The POWER9 systems have a pair of cores in the LLC domain. Hence to make
TurboSched more effective, increase the domain space for task packing
to search within NUMA domain.
Signed-off-by: Parth Shah <pa...@linux.ibm.com>
---
arch/powerpc/include/asm/topology.h | 3 +++
arch/powerpc/kernel/smp.c | 7 +++++++
2 files changed, 10 insertions(+)
diff --git a/arch/powerpc/include/asm/topology.h
b/arch/powerpc/include/asm/topology.h
index f85e2b01c3df..b2493bb11653 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -132,6 +132,9 @@ static inline void shared_proc_topology_init(void) {}
#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_core_id(cpu) (cpu_to_core_id(cpu))
+#define arch_turbo_domain powerpc_turbo_domain
+
+struct cpumask *powerpc_turbo_domain(int cpu);
int dlpar_cpu_readd(int cpu);
#endif
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index ea6adbf6a221..0fc4443a3f27 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1169,6 +1169,13 @@ static void remove_cpu_from_masks(int cpu)
}
#endif
+#ifdef CONFIG_SCHED_SMT
+inline struct cpumask *powerpc_turbo_domain(int cpu)
+{
+ return cpumask_of_node(cpu_to_node(cpu));
+}
+#endif
+
static inline void add_cpu_to_smallcore_masks(int cpu)
{
struct cpumask *this_l1_cache_map = per_cpu(cpu_l1_cache_map, cpu);
--
2.17.1
