leilei.lin fdccc3fb7a perf/core: Reduce context switch overhead ... Skip most of the PMU context switching overhead when ctx->nr_events is 0. 50% performance overhead was observed under an extreme testcase. Signed-off-by: leilei.lin <leilei.lin@alibaba-inc.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@kernel.org Cc: alexander.shishkin@linux.intel.com Cc: eranian@gmail.com Cc: jolsa@redhat.com Cc: linxiulei@gmail.com Cc: yang_oliver@hotmail.com Link: http://lkml.kernel.org/r/20170809002921.69813-1-leilei.lin@alibaba-inc.com [ Rewrote the changelog. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>		2017-08-10 12:08:40 +02:00
..
callchain.c	perf/callchain: Force USER_DS when invoking perf_callchain_user()	2017-05-10 07:54:00 +02:00
core.c	perf/core: Reduce context switch overhead	2017-08-10 12:08:40 +02:00
hw_breakpoint.c
internal.h
Makefile
ring_buffer.c	perf/aux: Correct return code of rb_alloc_aux() if !has_aux(ev)	2017-06-21 11:58:30 +02:00
uprobes.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h>	2017-03-02 08:42:28 +01:00