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| author | Ingo Molnar <mingo@elte.hu> | 2009-05-25 09:59:50 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-25 09:59:50 +0200 |
| commit | 85a9f9200226ddffc2ea50dae6a8df04c033ecd4 (patch) | |
| tree | 6d6068dda59a6645f278318f67390a8c24464ff4 /Documentation/perf_counter/perf.h | |
| parent | a3862d3f814ce7dfca9eed56ac23d29db3aee8d5 (diff) | |
| download | lwn-85a9f9200226ddffc2ea50dae6a8df04c033ecd4.tar.gz lwn-85a9f9200226ddffc2ea50dae6a8df04c033ecd4.zip | |
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>
Diffstat (limited to 'Documentation/perf_counter/perf.h')
| -rw-r--r-- | Documentation/perf_counter/perf.h | 4 |
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, group_fd, flags); } -#define MAX_COUNTERS 1024 -#define MAX_NR_CPUS 4096 +#define MAX_COUNTERS 256 +#define MAX_NR_CPUS 256 #define EID(type, id) (((__u64)(type) << PERF_COUNTER_TYPE_SHIFT) | (id)) |