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86e7972f69
kernel_optimize_test/kernel/events
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Wang Nan 86e7972f69 perf/ring_buffer: Introduce new ioctl options to pause and resume the ring-buffer 
Add new ioctl() to pause/resume ring-buffer output.

In some situations we want to read from the ring-buffer only when we
ensure nothing can write to the ring-buffer during reading. Without
this patch we have to turn off all events attached to this ring-buffer
to achieve this.

This patch is a prerequisite to enable overwrite support for the
perf ring-buffer support. Following commits will introduce new methods
support reading from overwrite ring buffer. Before reading, caller
must ensure the ring buffer is frozen, or the reading is unreliable.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <pi3orama@163.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.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>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1459147292-239310-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-31 10:30:45 +02:00
..
callchain.c treewide: Remove old email address 2015-11-23 09:44:58 +01:00
core.c perf/ring_buffer: Introduce new ioctl options to pause and resume the ring-buffer 2016-03-31 10:30:45 +02:00
hw_breakpoint.c perf: Collapse and fix event_function_call() users 2016-01-21 18:54:24 +01:00
internal.h perf/ring_buffer: Introduce new ioctl options to pause and resume the ring-buffer 2016-03-31 10:30:45 +02:00
Makefile
ring_buffer.c perf/ring_buffer: Introduce new ioctl options to pause and resume the ring-buffer 2016-03-31 10:30:45 +02:00
uprobes.c uprobes: __create_xol_area() must nullify xol_mapping.fault 2016-02-29 08:47:51 +01:00