1. 13 Aug, 2012 13 commits
  2. 11 Aug, 2012 2 commits
    • Jiri Olsa's avatar
      perf tools: Support for DWARF mode callchain · 26d33022
      Jiri Olsa authored
      This patch enables perf to use the DWARF unwind code.
      
      It extends the perf record '-g' option with following arguments:
        'fp'           - provides framepointer based user
                         stack backtrace
        'dwarf[,size]' - provides DWARF (libunwind) based user stack
                         backtrace. The size specifies the size of the
                         user stack dump. If omitted it is 8192 by default.
      
      If libunwind is found during the perf build, then the 'dwarf' argument
      becomes available for record command. The 'fp' stays as default option
      in any case.
      
      Examples: (perf compiled with libunwind)
      
         perf record -g dwarf ls
            - provides dwarf unwind with 8192 as stack dump size
      
         perf record -g dwarf,4096 ls
            - provides dwarf unwind with 4096 as stack dump size
      
         perf record -g -- ls
         perf record -g fp ls
            - provides frame pointer unwind
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-13-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      26d33022
    • Jiri Olsa's avatar
      perf tools: Support for DWARF CFI unwinding on post processing · 71ad0f5e
      Jiri Olsa authored
      This brings the support for DWARF cfi unwinding on perf post
      processing. Call frame informations are retrieved and then passed
      to libunwind that requests memory and register content from the
      applications.
      
      Adding unwind object to handle the user stack backtrace based
      on the user register values and user stack dump.
      
      The unwind object access the libunwind via remote interface
      and provides to it all the necessary data to unwind the stack.
      
      The unwind interface provides following function:
      	unwind__get_entries
      
      And callback (specified in above function) to retrieve
      the backtrace entries:
      	typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry,
      					 void *arg);
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-12-git-send-email-jolsa@redhat.com
      [ Replaced use of perf_session by usage of perf_evsel ]
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      71ad0f5e
  3. 10 Aug, 2012 10 commits
    • Jiri Olsa's avatar
      perf tools: Support user regs and stack in sample parsing · 0f6a3015
      Jiri Olsa authored
      Adding following info to be parsed out of the event sample:
       - user register set
       - user stack dump
      
      Both are global and specific to all events within the session.
      This info will be used in the unwind patches coming in shortly.
      
      Adding simple output printout (report -D) for both register and
      stack dumps.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-11-git-send-email-jolsa@redhat.com
      [ Use evsel->attr.sample_regs_user ]
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      0f6a3015
    • Jiri Olsa's avatar
      perf tools: Add libunwind dependency for DWARF CFI unwinding · 6a40cd90
      Jiri Olsa authored
      Adding libunwind to be linked with perf if available. It's required
      for the to get dwarf cfi unwinding support.
      
      Also building perf with the dwarf call frame informations by default,
      so that we can unwind callchains in perf itself.
      
      Adding LIBUNWIND_DIR Makefile variable allowing user to specify
      the directory with libunwind to be linked. This is used for
      debug purposes.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-10-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      6a40cd90
    • Jiri Olsa's avatar
      perf tools: Add interface to arch registers sets · 2bcd355b
      Jiri Olsa authored
      Adding header files to access unified API for arch registers.
      
        util/perf_regs.h - global perf_reg declarations
        arch/x86/include/perf_regs.h - x86 arch specific
      
      Adding perf_reg_name function to obtain register name based on the reg
      ID value, and PERF_REGS_MASK macro with mask definition of all current
      arch registers (will be used in unwind patches).
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-9-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      2bcd355b
    • Jiri Olsa's avatar
      perf tools: Adding PERF_ATTR_SIZE_VER2 to the header swap check · 239cc478
      Jiri Olsa authored
      Updating attr_file_abi_sizes array with PERF_ATTR_SIZE_VER2 version, so
      we have the swap check complete.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-8-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      239cc478
    • Frederic Weisbecker's avatar
      perf: Add attribute to filter out callchains · d0775264
      Frederic Weisbecker authored
      Introducing following bits to the the perf_event_attr struct:
      
        - exclude_callchain_kernel to filter out kernel callchain
          from the sample dump
      
        - exclude_callchain_user to filter out user callchain
          from the sample dump
      
      We need to be able to disable standard user callchain dump when we use
      the dwarf cfi callchain mode, because frame pointer based user
      callchains are useless in this mode.
      
      Implementing also exclude_callchain_kernel to have complete set of
      options.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      [ Added kernel callchains filtering ]
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-7-git-send-email-jolsa@redhat.comSigned-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      d0775264
    • Jiri Olsa's avatar
      perf: Add ability to attach user stack dump to sample · c5ebcedb
      Jiri Olsa authored
      Introducing PERF_SAMPLE_STACK_USER sample type bit to trigger the dump
      of the user level stack on sample. The size of the dump is specified by
      sample_stack_user value.
      
      Being able to dump parts of the user stack, starting from the stack
      pointer, will be useful to make a post mortem dwarf CFI based stack
      unwinding.
      
      Added HAVE_PERF_USER_STACK_DUMP config option to determine if the
      architecture provides user stack dump on perf event samples.  This needs
      access to the user stack pointer which is not unified across
      architectures. Enabling this for x86 architecture.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-6-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      c5ebcedb
    • Jiri Olsa's avatar
      perf: Add perf_output_skip function to skip bytes in sample · 5685e0ff
      Jiri Olsa authored
      Introducing perf_output_skip function to be able to skip data within the
      perf ring buffer.
      
      When writing data into perf ring buffer we first reserve needed place in
      ring buffer and then copy the actual data.
      
      There's a possibility we won't be able to fill all the reserved size
      with data, so we need a way to skip the remaining bytes.
      
      This is going to be useful when storing the user stack dump, where we
      might end up with less data than we originally requested.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Acked-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-5-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      5685e0ff
    • Frederic Weisbecker's avatar
      perf: Factor __output_copy to be usable with specific copy function · 91d7753a
      Frederic Weisbecker authored
      Adding a generic way to use __output_copy function with specific copy
      function via DEFINE_PERF_OUTPUT_COPY macro.
      
      Using this to add new __output_copy_user function, that provides output
      copy from user pointers. For x86 the copy_from_user_nmi function is used
      and __copy_from_user_inatomic for the rest of the architectures.
      
      This new function will be used in user stack dump on sample, coming in
      next patches.
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-4-git-send-email-jolsa@redhat.comSigned-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      91d7753a
    • Jiri Olsa's avatar
      perf: Add ability to attach user level registers dump to sample · 4018994f
      Jiri Olsa authored
      Introducing PERF_SAMPLE_REGS_USER sample type bit to trigger the dump of
      user level registers on sample. Registers we want to dump are specified
      by sample_regs_user bitmask.
      
      Only user level registers are dumped at the moment. Meaning the register
      values of the user space context as it was before the user entered the
      kernel for whatever reason (syscall, irq, exception, or a PMI happening
      in userspace).
      
      The layout of the sample_regs_user bitmap is described in
      asm/perf_regs.h for archs that support register dump.
      
      This is going to be useful to bring Dwarf CFI based stack unwinding on
      top of samples.
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      [ Dump registers ABI specification. ]
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Suggested-by: default avatarStephane Eranian <eranian@google.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-3-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      4018994f
    • Jiri Olsa's avatar
      perf: Unified API to record selective sets of arch registers · c5e63197
      Jiri Olsa authored
      This brings a new API to help the selective dump of registers on event
      sampling, and its implementation for x86 arch.
      
      Added HAVE_PERF_REGS config option to determine if the architecture
      provides perf registers ABI.
      
      The information about desired registers will be passed in u64 mask.
      It's up to the architecture to map the registers into the mask bits.
      
      For the x86 arch implementation, both 32 and 64 bit registers bits are
      defined within single enum to ensure 64 bit system can provide register
      dump for compat task if needed in the future.
      Original-patch-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      [ Added missing linux/errno.h include ]
      Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Arun Sharma <asharma@fb.com>
      Cc: Benjamin Redelings <benjamin.redelings@nescent.org>
      Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Ulrich Drepper <drepper@gmail.com>
      Link: http://lkml.kernel.org/r/1344345647-11536-2-git-send-email-jolsa@redhat.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      c5e63197
  4. 09 Aug, 2012 9 commits
  5. 08 Aug, 2012 6 commits