[tip:perfcounters/core] perf_counter tools: increase limits, fix

tip-bot for Ingo Molnar
2009-05-25T08:04:37Z

Commit-ID: 85a9f9200226ddffc2ea50dae6a8df04c033ecd4
Gitweb: http://git.kernel.org/tip/85a9f9200226ddffc2ea50dae6a8df04c033ecd4
Author: Ingo Molnar <mingo@elte.hu>
AuthorDate: Mon, 25 May 2009 09:59:50 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 25 May 2009 09:59:50 +0200

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>

---
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 a517683..5a2520b 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))