Peter Zijlstra 66d258c5b0 perf/core: Optimize perf_init_event() ... Andi reported that he was hitting the linear search in perf_init_event() a lot. Make more agressive use of the IDR lookup to avoid hitting the linear search. With exception of PERF_TYPE_SOFTWARE (which relies on a hideous hack), we can put everything in the IDR. On top of that, we can alias TYPE_HARDWARE and TYPE_HW_CACHE to TYPE_RAW on the lookup side. This greatly reduces the chances of hitting the linear search. Reported-by: Andi Kleen <andi@firstfloor.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan <kan.liang@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>		2019-10-28 12:51:02 +01:00
..
callchain.c	perf/core: Convert to SPDX license identifiers	2019-02-04 08:46:11 +01:00
core.c	perf/core: Optimize perf_init_event()	2019-10-28 12:51:02 +01:00
hw_breakpoint.c	perf/hw_breakpoint: Fix arch_hw_breakpoint use-before-initialization	2019-09-06 08:24:01 +02:00
internal.h	perf/ring-buffer: Use regular variables for nesting	2019-05-24 09:00:11 +02:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ring_buffer.c	perf/ring_buffer: Matching the memory allocate and free, in rb_alloc()	2019-10-17 21:31:55 +02:00
uprobes.c	kernel/events/uprobes.c: only do FOLL_SPLIT_PMD for uprobe register	2019-10-19 06:32:33 -04:00