Commit-ID: 96681fc3c9e7d1f89ab64e5eec40b6467c97680f Gitweb: http://git.kernel.org/tip/96681fc3c9e7d1f89ab64e5eec40b6467c97680f Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> AuthorDate: Tue, 19 Oct 2010 14:55:33 +0200 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Fri, 22 Oct 2010 14:18:26 +0200 perf, x86: Use NUMA aware allocations for PEBS/BTS/DS allocations For performance reasons its best to use memory node local memory for per-cpu buffers. This logic comes from a much larger patch proposed by Stephane. Suggested-by: Stephane Eranian <eranian@xxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Acked-by: Stephane Eranian <eranian@xxxxxxxxxx> LKML-Reference: <20101019134808.514465326@xxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- arch/x86/kernel/cpu/perf_event_intel_ds.c | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 8a7f81c..b7dcd9f 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -77,13 +77,14 @@ static void fini_debug_store_on_cpu(int cpu) static int alloc_pebs_buffer(int cpu) { struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds; + int node = cpu_to_node(cpu); int max, thresh = 1; /* always use a single PEBS record */ void *buffer; if (!x86_pmu.pebs) return 0; - buffer = kzalloc(PEBS_BUFFER_SIZE, GFP_KERNEL); + buffer = kmalloc_node(PEBS_BUFFER_SIZE, GFP_KERNEL | __GFP_ZERO, node); if (unlikely(!buffer)) return -ENOMEM; @@ -114,13 +115,14 @@ static void release_pebs_buffer(int cpu) static int alloc_bts_buffer(int cpu) { struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds; + int node = cpu_to_node(cpu); int max, thresh; void *buffer; if (!x86_pmu.bts) return 0; - buffer = kzalloc(BTS_BUFFER_SIZE, GFP_KERNEL); + buffer = kmalloc_node(BTS_BUFFER_SIZE, GFP_KERNEL | __GFP_ZERO, node); if (unlikely(!buffer)) return -ENOMEM; @@ -150,9 +152,10 @@ static void release_bts_buffer(int cpu) static int alloc_ds_buffer(int cpu) { + int node = cpu_to_node(cpu); struct debug_store *ds; - ds = kzalloc(sizeof(*ds), GFP_KERNEL); + ds = kmalloc_node(sizeof(*ds), GFP_KERNEL | __GFP_ZERO, node); if (unlikely(!ds)) return -ENOMEM; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html