linux-stable.git/tools/perf/arch, branch linux-3.17.y

perf powerpc: Include util/util.h and remove stringify macros

2014-07-24T14:00:39+00:00

The stringify macros are defined in tools/perf/util/util.h and don't
need to be redfined specfiically for powerpc.

Signed-off-by: Sukadev Bhattiprolu 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Cc: Michael Ellerman 
Link: http://lkml.kernel.org/r/20140724074718.GB18829@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move rdtsc() function

2014-07-23T14:48:11+00:00

Move the rdtsc() function so it can be reusued.

Signed-off-by: Adrian Hunter 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1406035081-14301-24-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Allow TSC conversion on any arch

2014-07-17T15:59:00+00:00

It is possible to record a perf.data file on one architecture and
process it on another.

Consequently, TSC conversion functions need to be moved out of the arch
directory.

Signed-off-by: Adrian Hunter 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1405332185-4050-40-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move pr_* debug macros into debug object

2014-07-17T15:58:39+00:00

Moving pr_* debug macros to have it with in same object as debug
variables, becase we will change them to use verbose variable in next
patch.

Signed-off-by: Jiri Olsa 
Cc: Corey Ashford 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1405374411-29012-3-git-send-email-jolsa@kernel.org
[ Add missing debug.h include in python scripting glue and in the libdw unwind lib ]
Signed-off-by: Arnaldo Carvalho de Melo

perf kvm: Add stat support on s390

2014-07-16T20:57:33+00:00

On s390, the vmexit event has a tree-like structure: between
exit_event_begin and exit_event_end several other events may happen and
with each of them refining the previous ones.

This patch adds a decoder for such events to the generic code and also
the files  and kvm-stat.c for s390.

Commands 'perf kvm stat record', 'report' and 'live' are supported.

Reviewed-by: David Ahern 
Signed-off-by: Alexander Yarygin 
Acked-by: Christian Borntraeger 
Cc: Christian Borntraeger 
Cc: Cornelia Huck 
Cc: David Ahern 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1404397747-20939-5-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf kvm: Add skip_event() for --duration option

2014-07-16T20:57:32+00:00

Current code skips output of the x86 specific HLT event in order to
avoid flooding the output with enabled --duration option. The events to
be skipped should be architecture dependent, though.

Let's add an architecture specific array of events to be skipped and
introduce a skip_event() function checking against that array.

Reviewed-by: Christian Borntraeger 
Reviewed-by: Cornelia Huck 
Reviewed-by: David Ahern 
Signed-off-by: Alexander Yarygin 
Cc: Christian Borntraeger 
Cc: Cornelia Huck 
Cc: David Ahern 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1404397747-20939-4-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf kvm: Move arch specific code into arch/

2014-07-16T20:57:32+00:00

Parts of a 'perf kvm stat' code make sense only for x86.

Let's move this code into the arch/x86/kvm-stat.c file and add
util/kvm-stat.h for generic structure definitions.

Add a global array 'kvm_reg_events_ops' for accessing the arch-specific
'kvm_events_ops' from generic code.

Since the several global arrays (i.e. 'kvm_events_tp') have been moved
to arch/*, we can not know their sizes and use them directly in
builtin-kvm.c. This patch fixes that problem by adding trimming NULL
element to each array and changing the behavior of their handlers in
generic code.

Reviewed-by: David Ahern 
Reviewed-by: Cornelia Huck 
Signed-off-by: Alexander Yarygin 
Acked-by: Christian Borntraeger 
Cc: Christian Borntraeger 
Cc: Cornelia Huck 
Cc: David Ahern 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1404397747-20939-3-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Allow to use cpuinfo on s390

2014-07-07T19:55:24+00:00

This patch defines CPUINFO_PROC for s390 and implements get_cpuid().

Reviewed-by: Cornelia Huck 
Reviewed-by: David Ahern 
Signed-off-by: Alexander Yarygin 
Acked-by: Christian Borntraeger 
Cc: Christian Borntraeger 
Cc: Cornelia Huck 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/87ioneo7qh.wl%yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf kvm: Introduce HAVE_KVM_STAT_SUPPORT flag

2014-07-07T19:55:23+00:00

kvm stat support is currently conditional on i386/x86_64. Let's abstract
this into a HAVE_KVM_STAT_SUPPORT flag, so that other architectures can
support kvm stat as well.

Reviewed-by: Cornelia Huck 
Reviewed-by: David Ahern 
Signed-off-by: Alexander Yarygin 
Acked-by: Christian Borntraeger 
Cc: Christian Borntraeger 
Cc: Cornelia Huck 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1404395992-17095-2-git-send-email-yarygin@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools powerpc: Adjust callchain based on DWARF debug info

2014-06-27T09:14:51+00:00

When saving the callchain on Power, the kernel conservatively saves excess
entries in the callchain. A few of these entries are needed in some cases
but not others. We should use the DWARF debug information to determine
when the entries are  needed.

Eg: the value in the link register (LR) is needed only when it holds the
return address of a function. At other times it must be ignored.

If the unnecessary entries are not ignored, we end up with duplicate arcs
in the call-graphs.

Use the DWARF debug information to determine if any callchain entries
should be ignored when building call-graphs.

Callgraph before the patch:

    14.67%          2234  sprintft  libc-2.18.so       [.] __random
            |
            --- __random
               |
               |--61.12%-- __random
               |          |
               |          |--97.15%-- rand
               |          |          do_my_sprintf
               |          |          main
               |          |          generic_start_main.isra.0
               |          |          __libc_start_main
               |          |          0x0
               |          |
               |           --2.85%-- do_my_sprintf
               |                     main
               |                     generic_start_main.isra.0
               |                     __libc_start_main
               |                     0x0
               |
                --38.88%-- rand
                          |
                          |--94.01%-- rand
                          |          do_my_sprintf
                          |          main
                          |          generic_start_main.isra.0
                          |          __libc_start_main
                          |          0x0
                          |
                           --5.99%-- do_my_sprintf
                                     main
                                     generic_start_main.isra.0
                                     __libc_start_main
                                     0x0

Callgraph after the patch:

    14.67%          2234  sprintft  libc-2.18.so       [.] __random
            |
            --- __random
               |
               |--95.93%-- rand
               |          do_my_sprintf
               |          main
               |          generic_start_main.isra.0
               |          __libc_start_main
               |          0x0
               |
                --4.07%-- do_my_sprintf
                          main
                          generic_start_main.isra.0
                          __libc_start_main
                          0x0

TODO:	For split-debug info objects like glibc, we can only determine
	the call-frame-address only when both .eh_frame and .debug_info
	sections are available. We should be able to determin the CFA
	even without the .eh_frame section.

Fix suggested by Anton Blanchard.

Thanks to valuable input on DWARF debug information from Ulrich Weigand.

Reported-by: Maynard Johnson 
Tested-by: Maynard Johnson 
Signed-off-by: Sukadev Bhattiprolu 
Link: http://lkml.kernel.org/r/20140625154903.GA29607@us.ibm.com
Signed-off-by: Jiri Olsa