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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-05-25 10:25:50 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-13 15:58:27 +0200 |
| commit | adac0f1e8c08548d82a48c9913ebc9787f946440 (patch) | |
| tree | 290e69f3e727a33b0e3a8ed8f012141f4a469b88 /arch/s390/include/asm/topology.h | |
| parent | a62247e1f5c13b926f535bb64ecbd7f9fdef7b21 (diff) | |
| download | linux-adac0f1e8c08548d82a48c9913ebc9787f946440.tar.gz linux-adac0f1e8c08548d82a48c9913ebc9787f946440.tar.bz2 linux-adac0f1e8c08548d82a48c9913ebc9787f946440.zip | |
s390/topology: add drawer scheduling domain level
The z13 machine added a fourth level to the cpu topology
information. The new top level is called drawer.
A drawer contains two books, which used to be the top level.
Adding this additional scheduling domain did show performance
improvements for some workloads of up to 8%, while there don't
seem to be any workloads impacted in a negative way.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/topology.h')
| -rw-r--r-- | arch/s390/include/asm/topology.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h index 6b53962e807e..f15f5571ca2b 100644 --- a/arch/s390/include/asm/topology.h +++ b/arch/s390/include/asm/topology.h @@ -14,10 +14,12 @@ struct cpu_topology_s390 { unsigned short core_id; unsigned short socket_id; unsigned short book_id; + unsigned short drawer_id; unsigned short node_id; cpumask_t thread_mask; cpumask_t core_mask; cpumask_t book_mask; + cpumask_t drawer_mask; }; DECLARE_PER_CPU(struct cpu_topology_s390, cpu_topology); @@ -30,6 +32,8 @@ DECLARE_PER_CPU(struct cpu_topology_s390, cpu_topology); #define topology_core_cpumask(cpu) (&per_cpu(cpu_topology, cpu).core_mask) #define topology_book_id(cpu) (per_cpu(cpu_topology, cpu).book_id) #define topology_book_cpumask(cpu) (&per_cpu(cpu_topology, cpu).book_mask) +#define topology_drawer_id(cpu) (per_cpu(cpu_topology, cpu).drawer_id) +#define topology_drawer_cpumask(cpu) (&per_cpu(cpu_topology, cpu).drawer_mask) #define mc_capable() 1 |