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authorIngo Molnar <mingo@elte.hu>2009-05-25 03:59:50 -0400
committerIngo Molnar <mingo@elte.hu>2009-05-25 03:59:50 -0400
commit85a9f9200226ddffc2ea50dae6a8df04c033ecd4 (patch)
tree6d6068dda59a6645f278318f67390a8c24464ff4
parenta3862d3f814ce7dfca9eed56ac23d29db3aee8d5 (diff)
perf_counter tools: increase limits, fix
NR_CPUS and NR_COUNTERS goes up quadratic ... 1024x4096 was far too ambitious upper limit - go for 256x256 which is still plenty. [ Impact: reduce perf tool memory consumption ] Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--Documentation/perf_counter/perf.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/perf_counter/perf.h b/Documentation/perf_counter/perf.h
index a517683fc661..5a2520bb7e55 100644
--- a/Documentation/perf_counter/perf.h
+++ b/Documentation/perf_counter/perf.h
@@ -61,8 +61,8 @@ sys_perf_counter_open(struct perf_counter_hw_event *hw_event_uptr,
61 group_fd, flags); 61 group_fd, flags);
62} 62}
63 63
64#define MAX_COUNTERS 1024 64#define MAX_COUNTERS 256
65#define MAX_NR_CPUS 4096 65#define MAX_NR_CPUS 256
66 66
67#define EID(type, id) (((__u64)(type) << PERF_COUNTER_TYPE_SHIFT) | (id)) 67#define EID(type, id) (((__u64)(type) << PERF_COUNTER_TYPE_SHIFT) | (id))
68 68