linux-stable.git/tools/perf/util/machine.c, branch linux-3.16.y

perf symbols: Get kernel start address by symbol name

2014-06-20T07:34:22+00:00

The function machine__get_kernel_start_addr() was taking the first symbol
of kallsyms as the start address. This is incorrect in certain cases
where the first symbol is something at 0, while the actual kernel
functions begin at a later point (e.g. 0x80200000).

This patch fixes machine__get_kernel_start_addr() to search for the
symbol "_text" or "_stext", which marks the beginning of kernel mapping.
This was already being done in machine__create_kernel_maps(). Thus, this
patch is just a refactor, to move that code into
machine__get_kernel_start_addr().

Signed-off-by: Simon Que 
Link: http://lkml.kernel.org/r/1402943529-13244-1-git-send-email-sque@chromium.org
Signed-off-by: Jiri Olsa

perf tools: Update mmap2 interface with protection and flag bits

2014-06-09T11:34:45+00:00

The kernel piece passes more info now.  Update the perf tool to reflect
that and adjust the synthesized maps to play along.

Signed-off-by: Don Zickus 
Link: http://lkml.kernel.org/r/1400526833-141779-4-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa

Merge branch 'perf/urgent' into perf/core, to resolve conflict

2014-05-01T06:24:39+00:00

Conflicts:
	tools/perf/arch/x86/tests/dwarf-unwind.c

Signed-off-by: Ingo Molnar

perf machine: Search for modules in %s/lib/modules/%s

2014-04-30T14:49:29+00:00

Modules installed outside of the kernel's build system should go into
"%s/lib/modules/%s/extra", but at present, perf will only look at them
when they are in "%s/lib/modules/%s/kernel". Lets encourage good
citizenship by relaxing this requirement to "%s/lib/modules/%s". This
way open source modules that are out-of-tree have no incentive to start
populating a directory reserved for in-kernel modules and I can stop
hex-editing my system's perf binary when profiling OSS out-of-tree
modules.

Feedback from Namhyung Kim correctly revealed that the hex-edits that I
had been doing meant that perf was also traversing the build and source
symlinks in %s/lib/modules/%s. That is undesireable, so we explicitly
exclude them from traversal with a minor tweak to the traversal routine.

Signed-off-by: Richard Yao 
Acked-by: Namhyung kim 
Link: http://lkml.kernel.org/r/1398532675-13684-1-git-send-email-ryao@gentoo.org
Signed-off-by: Jiri Olsa

perf tools: Share map_groups among threads of the same group

2014-04-28T11:43:33+00:00

Sharing map groups within all process threads. This way
there's only one copy of mmap info and it's reachable
from any thread within the process.

Original-patch-by: Arnaldo Carvalho de Melo 
Acked-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Corey Ashford 
Cc: David Ahern 
Cc: Don Zickus 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Mike Galbraith 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1397490723-1992-5-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa

perf tools: Use tid in mmap/mmap2 events to find maps

2014-03-18T21:17:00+00:00

Now that we can properly synthesize threads system-wide, make sure the
mmap and mmap2 events use tids instead of pids to locate their maps.

Signed-off-by: Don Zickus 
Cc: Jiri Olsa 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1393429527-167840-3-git-send-email-dzickus@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

perf symbols: Record the reason for filtering an address_location

2014-03-18T21:16:57+00:00

By turning the addr_location->filtered member from a boolean to a u8
bitmap, reusing (and extending) the hist_filter enum for that.

This patch doesn't change the logic at all, as it keeps the meaning of
al->filtered !0 to mean that the entry _was_ filtered, so no change in
how this value is interpreted needs to be done at this point.

This will be soon used in upcoming patches.

Signed-off-by: Namhyung Kim 
Acked-by: Jiri Olsa 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/n/tip-89hmfgtr9t22sky1lyg7nw7l@git.kernel.org
[ yanked this out of a previous patch ]
Signed-off-by: Arnaldo Carvalho de Melo

perf machine: Factor machine__find_thread to take tid argument

2014-03-14T21:08:42+00:00

Forcing the code to always search thread by pid/tid pair.

The PID value will be needed in future to determine the process thread
leader for map groups sharing.

Signed-off-by: Jiri Olsa 
Acked-by: Adrian Hunter 
Cc: Corey Ashford 
Cc: David Ahern 
Cc: Don Zickus 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1394805606-25883-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

perf symbols: Introduce thread__find_cpumode_addr_location

2014-03-14T21:08:40+00:00

Its one level up thread__find_addr_location, where it will look in
different domains for a sample: user, kernel, hypervisor, etc.

Will soon be used by a patchkit by Andi Kleen.

Cc: Adrian Hunter 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Jiri Olsa 
Cc: Mike Galbraith 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/n/tip-so6nxkh7xj48bc5kq4jpj991@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'perf/urgent' into perf/core

2014-03-11T10:53:50+00:00

Merge the latest fixes.

Signed-off-by: Ingo Molnar