Commit 85a9f920 authored May 25, 2009 by Ingo Molnar

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>

parent a3862d3f

Documentation/perf_counter/perf.h

+2 −2

Original line number	Original line	Diff line number	Diff line
	@@ -61,8 +61,8 @@ sys_perf_counter_open(struct perf_counter_hw_event *hw_event_uptr,
	group_fd, flags);		group_fd, flags);
	}		}

	#define MAX_COUNTERS 1024		#define MAX_COUNTERS 256
	#define MAX_NR_CPUS 4096		#define MAX_NR_CPUS 256

	#define EID(type, id) (((__u64)(type) << PERF_COUNTER_TYPE_SHIFT) \| (id))		#define EID(type, id) (((__u64)(type) << PERF_COUNTER_TYPE_SHIFT) \| (id))