path: root/tools
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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-09-17 19:01:10 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-17 22:08:26 +0200
commit2667de81f3256c944b06abdf2c56c2f192fcb724 (patch)
treed642156cfe0c52d2fb7ec1de4a2060018c8e3f8d /tools
parent850bc73ffcc99cddfb52bc23217c60810c508853 (diff)
perf_counter: Allow for a wakeup watermark
Currently we wake the mmap() consumer once every PAGE_SIZE of data and/or once event wakeup_events when specified. For high speed sampling this results in too many wakeups wrt. the buffer size, hence change this. We move the default wakeup limit to 1/4-th the buffer size, and provide for means to manually specify this limit. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
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