1. 26 Nov, 2009 21 commits
    • Stephane Eranian's avatar
      perf_events: Fix read() bogus counts when in error state · b2e74a26
      Stephane Eranian authored
      When a pinned group cannot be scheduled it goes into error state.
      
      Normally a group cannot go out of error state without being
      explicitly re-enabled or disabled. There was a bug in per-thread
      mode, whereby upon termination of the thread, the group would
      transition from error to off leading to bogus counts and timing
      information returned by read().
      
      Fix it by clearing the error state.
      Signed-off-by: default avatarStephane Eranian <eranian@google.com>
      Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: perfmon2-devel@lists.sourceforge.net
      LKML-Reference: <4b0eb9ce.0508d00a.573b.ffffeab6@mx.google.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b2e74a26
    • Ingo Molnar's avatar
      tracing: Fix kmem event exports · 4d795fb1
      Ingo Molnar authored
      Commit 53d0422c ("tracing: Convert some kmem events to DEFINE_EVENT")
      moved the kmem tracepoint creation from util.c to page_alloc.c,
      but forgot to move the exports.
      
      Move them back.
      
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Pekka Enberg <penberg@cs.helsinki.fi>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      LKML-Reference: <4B0E286A.2000405@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      4d795fb1
    • Masami Hiramatsu's avatar
      tracepoint: Add signal loss events · ba005e1f
      Masami Hiramatsu authored
      Add signal_overflow_fail and signal_lose_info tracepoints
      for signal-lost events.
      
      Changes in v3:
       - Add docbook style comments
      
      Changes in v2:
       - Use siginfo string macro
      Suggested-by: default avatarRoland McGrath <roland@redhat.com>
      Reviewed-by: default avatarJason Baron <jbaron@redhat.com>
      Signed-off-by: default avatarMasami Hiramatsu <mhiramat@redhat.com>
      Acked-by: default avatarRoland McGrath <roland@redhat.com>
      Cc: systemtap <systemtap@sources.redhat.com>
      Cc: DLE <dle-develop@lists.sourceforge.net>
      Cc: Oleg Nesterov <oleg@redhat.com>
      LKML-Reference: <20091124215658.30449.9934.stgit@dhcp-100-2-132.bos.redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      ba005e1f
    • Masami Hiramatsu's avatar
      tracepoint: Add signal deliver event · f9d4257e
      Masami Hiramatsu authored
      Add a tracepoint where a process gets a signal. This tracepoint
      shows signal-number, sa-handler and sa-flag.
      
      Changes in v3:
       - Add docbook style comments
      
      Changes in v2:
       - Add siginfo argument
       - Fix comment
      Signed-off-by: default avatarMasami Hiramatsu <mhiramat@redhat.com>
      Reviewed-by: default avatarJason Baron <jbaron@redhat.com>
      Acked-by: default avatarRoland McGrath <roland@redhat.com>
      Cc: systemtap <systemtap@sources.redhat.com>
      Cc: DLE <dle-develop@lists.sourceforge.net>
      Cc: Oleg Nesterov <oleg@redhat.com>
      LKML-Reference: <20091124215651.30449.20926.stgit@dhcp-100-2-132.bos.redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      f9d4257e
    • Masami Hiramatsu's avatar
      tracepoint: Move signal sending tracepoint to events/signal.h · d1eb650f
      Masami Hiramatsu authored
      Move signal sending event to events/signal.h. This patch also
      renames sched_signal_send event to signal_generate.
      
      Changes in v4:
       - Fix a typo of task_struct pointer.
      
      Changes in v3:
       - Add docbook style comments
      
      Changes in v2:
       - Add siginfo argument
       - Add siginfo storing macro
      Signed-off-by: default avatarMasami Hiramatsu <mhiramat@redhat.com>
      Reviewed-by: default avatarJason Baron <jbaron@redhat.com>
      Acked-by: default avatarRoland McGrath <roland@redhat.com>
      Cc: systemtap <systemtap@sources.redhat.com>
      Cc: DLE <dle-develop@lists.sourceforge.net>
      Cc: Oleg Nesterov <oleg@redhat.com>
      LKML-Reference: <20091124215645.30449.60208.stgit@dhcp-100-2-132.bos.redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d1eb650f
    • Frederic Weisbecker's avatar
      hw-breakpoints: Fix unused function in off-case · 80bbf6b6
      Frederic Weisbecker authored
      bp_perf_event_destroy() is unused in its off-case version, let's
      remove it to fix the following warning reported by Stephen
      Rothwell in linux-next:
      
        kernel/perf_event.c:4306: warning: 'bp_perf_event_destroy' defined but not used
      Reported-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <1259180453-5813-1-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      80bbf6b6
    • Andrew Morton's avatar
      kernel/hw_breakpoint.c: Fix local/global shadowing · 11e66357
      Andrew Morton authored
      If the new percpu tree is combined with the perf events tree
      the following new warning triggers:
      
       kernel/hw_breakpoint.c: In function 'toggle_bp_task_slot':
       kernel/hw_breakpoint.c:151: warning: 'task_bp_pinned' is used uninitialized in this function
      
      Because it's not valid anymore to define a local variable
      and a percpu variable (even if it's file scope local) with
      the same name.
      
      Rename the local variable to resolve this.
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: K.Prasad <prasad@linux.vnet.ibm.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      LKML-Reference: <200911260701.nAQ71owx016356@imap1.linux-foundation.org>
      [ v2: added changelog ]
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      11e66357
    • Frederic Weisbecker's avatar
      x86/hw-breakpoints: Don't lose GE flag while disabling a breakpoint · 2c31b795
      Frederic Weisbecker authored
      When we schedule out a breakpoint from the cpu, we also
      incidentally remove the "Global exact breakpoint" flag from the
      breakpoint control register. It makes us losing the fine grained
      precision about the origin of the instructions that may trigger
      breakpoint exceptions for the other breakpoints running in this
      cpu.
      Reported-by: default avatarPrasad <prasad@linux.vnet.ibm.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <1259211878-6013-1-git-send-regression-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      2c31b795
    • Frederic Weisbecker's avatar
      hw-breakpoints: Simplify error handling in breakpoint creation requests · 605bfaee
      Frederic Weisbecker authored
      This simplifies the error handling when we create a breakpoint.
      We don't need to check the NULL return value corner case anymore
      since we have improved perf_event_create_kernel_counter() to
      always return an error code in the failure case.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Prasad <prasad@linux.vnet.ibm.com>
      LKML-Reference: <1259210142-5714-3-git-send-regression-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      605bfaee
    • Frederic Weisbecker's avatar
      hw-breakpoints: Improve in-kernel event creation error granularity · c6567f64
      Frederic Weisbecker authored
      In fail case, perf_event_create_kernel_counter() returns NULL
      instead of an error, which doesn't help us to inform the user
      about the origin of the problem from the outer most callers.
      Often we can just return -EINVAL, which doesn't help anyone when
      it's eventually about a memory allocation failure.
      
      Then, this patch makes perf_event_create_kernel_counter() always
      return a detailed error code.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Prasad <prasad@linux.vnet.ibm.com>
      LKML-Reference: <1259210142-5714-2-git-send-regression-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c6567f64
    • Frederic Weisbecker's avatar
      ksym_tracer: Fix breakpoint removal after modification · d99be40a
      Frederic Weisbecker authored
      The error path of a breakpoint modification is broken in
      the ksym tracer. A modified breakpoint hlist node is immediately
      released after its removal. Also we leak a breakpoint in this
      case.
      
      Fix the path.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Prasad <prasad@linux.vnet.ibm.com>
      LKML-Reference: <1259210142-5714-1-git-send-regression-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d99be40a
    • Li Zefan's avatar
      tracing: Restore original format of sched events · 470dda74
      Li Zefan authored
      The original format for sched_stat_iowait and sched_stat_sleep:
      
        $ cat events/sched/sched_stat_iowait/format
        ...
        print fmt: "comm=%s pid=%d delay=%Lu [ns]", ...
        $ cat events/sched/sched_stat_sleep/format
        ...
        print fmt: "comm=%s pid=%d delay=%Lu [ns]", ...
      
      But commit commit 75ec29ab
      ("tracing: Convert some sched trace events to DEFINE_EVENT and
      _PRINT") broke the format:
      
        $ cat events/sched/sched_stat_iowait/format
        print fmt: "task: %s:%d iowait: %Lu [ns]", ...
        $ cat events/sched/sched_stat_sleep/format
        print fmt: "task: %s:%d sleep: %Lu [ns]", ...
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E2951.9050800@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      470dda74
    • Li Zefan's avatar
      tracing: Convert some ext4 events to DEFINE_TRACE · b5eb34c3
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
       294695    6104     340  301139   49853 fs/ext4/ext4.o.old
       289983    6104     324  296411   485db fs/ext4/ext4.o
      
      5 events are convertd:
      
        ext4__write_begin: ext4_write_begin, ext4_da_write_begin
        ext4__write_end: ext4_{ordered, writeback, journalled}_write_end
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Theodore Ts'o <tytso@mit.edu>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E2938.2040708@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b5eb34c3
    • Li Zefan's avatar
      tracing: Convert some jbd2 events to DEFINE_EVENT · 071688f3
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
        34903    1693     448   37044    90b4 fs/jbd2/journal.o.old
        31931    1693     416   34040    84f8 fs/jbd2/journal.o
      
      Four events are converted:
      
        jbd2_commit: jbd2_start_commit,
                     jbd2_commit_{locking, flushing, logging}
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Theodore Ts'o <tytso@mit.edu>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E290F.7030909@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      071688f3
    • Li Zefan's avatar
      tracing: Convert some block events to DEFINE_EVENT · 77ca1e02
      Li Zefan authored
      use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
        53570    3284     184   57038    dece block/blk-core.o.old
        43702    3284     144   47130    b81a block/blk-core.o
      
      12 events are converted:
      
        block_rq: block_rq_insert, block_rq_issue
        block_rq_with_error: block_rq_{abort, requeue, complete}
        block_bio: block_bio_{backmerge, frontmerge, queue}
        block_get_rq: block_getrq, block_sleeprq
        block_unplug: block_unplug_timer, block_unplug_io
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E28E6.7060609@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      77ca1e02
    • Li Zefan's avatar
      tracing: Convert some power events to DEFINE_EVENT · 7703466b
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
         4312     524      12    4848    12f0 kernel/trace/power-traces.o.old
         3455     524       8    3987     f93 kernel/trace/power-traces.o
      
      Two events are converted:
      
        power: power_start, power_frequency
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Arjan van de Ven <arjan@infradead.org>
      LKML-Reference: <4B0E28C2.1090906@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      7703466b
    • Li Zefan's avatar
      tracing: Convert some workqueue events to DEFINE_EVENT · 382ece71
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
        13171     800      72   14043    36db kernel/workqueue.o.old
        12243     800      68   13111    3337 kernel/workqueue.o
      
      Two events are converted:
      
        workqueue: workqueue_insertion, workqueue_execution
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E289F.5010104@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      382ece71
    • Li Zefan's avatar
      tracing: Convert softirq events to DEFINE_EVENT · c467307c
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
        12781     952      36   13769    35c9 kernel/softirq.o.old
        11981     952      32   12965    32a5 kernel/softirq.o
      
      Two events are converted:
      
        softirq: softirq_entry, softirq_exit
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E287F.4030708@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c467307c
    • Li Zefan's avatar
      tracing: Convert some kmem events to DEFINE_EVENT · 53d0422c
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
       333987   69800   27228  431015   693a7 mm/built-in.o.old
       330030   69800   27228  427058   68432 mm/built-in.o
      
      8 events are converted:
      
        kmem_alloc: kmalloc, kmem_cache_alloc
        kmem_alloc_node: kmalloc_node, kmem_cache_alloc_node
        kmem_free: kfree, kmem_cache_free
        mm_page: mm_page_alloc_zone_locked, mm_page_pcpu_drain
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Acked-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      LKML-Reference: <4B0E286A.2000405@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      53d0422c
    • Li Zefan's avatar
      tracing: Convert module refcnt events to DEFINE_EVENT · 925684d6
      Li Zefan authored
      Use DECLARE_EVENT_CLASS to remove duplicate code:
      
         text    data     bss     dec     hex filename
        29854    1980     128   31962    7cda kernel/module.o.old
        28750    1980     128   30858    788a kernel/module.o
      
      Two events are converted:
      
        module_refcnt: module_get, module_put
      
      No change in functionality.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E283B.3010508@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      925684d6
    • Ingo Molnar's avatar
      events: Rename TRACE_EVENT_TEMPLATE() to DECLARE_EVENT_CLASS() · 091ad365
      Ingo Molnar authored
      It is not quite obvious at first sight what TRACE_EVENT_TEMPLATE
      does: does it define an event as well beyond defining a template?
      
      To clarify this, rename it to DECLARE_EVENT_CLASS, which follows
      the various 'DECLARE_*()' idioms we already have in the kernel:
      
        DECLARE_EVENT_CLASS(class)
      
          DEFINE_EVENT(class, event1)
          DEFINE_EVENT(class, event2)
          DEFINE_EVENT(class, event3)
      
      To complete this logic we should also rename TRACE_EVENT() to:
      
        DEFINE_SINGLE_EVENT(single_event)
      
      ... but in a more quiet moment of the kernel cycle.
      
      Cc: Pekka Enberg <penberg@cs.helsinki.fi>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4B0E286A.2000405@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      091ad365
  2. 25 Nov, 2009 4 commits
  3. 24 Nov, 2009 15 commits
    • Steven Rostedt's avatar
      tracing: Convert some sched trace events to DEFINE_EVENT and _PRINT · 75ec29ab
      Steven Rostedt authored
      Converting some of the scheduler trace events to use the
      TRACE_EVENT_TEMPLATE, DEFINE_EVENT and DEFINE_EVENT_PRINT helped to
      save some space:
      
      $ size kernel/sched.o-*
         text	   data	    bss	    dec	    hex	filename
        79299	   6776	   2520	  88595	  15a13	kernel/sched.o-notrace
       101941	  11896	   2584	 116421	  1c6c5	kernel/sched.o-templ
       104779	  11896	   2584	 119259	  1d1db	kernel/sched.o-trace
      
      sched.o-notrace is without any tracepoints compiled
      sched.o-templ is with this patch
      sched.o-trace is the tracepoints before this patch
      
      The trace events converted to DEFINE_EVENT:
      
      sched_wakeup, sched_wakeup_new, sched_process_free, sched_process_exit,
      and sched_stat_wait.
      
      The trace events converted to DEFINE_EVENT_PRINT:
      
      sched_stat_sleep and sched_stat_iowait.
      
      Note, since the TRACE_EVENT_TEMPLATE always uses a print, the
      sched_stat_wait print format is defined in the template and this
      template is used by sched_stat_sleep and sched_stat_iowait. But the
      later two override the print format.
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      75ec29ab
    • Steven Rostedt's avatar
      tracing: Create new DEFINE_EVENT_PRINT · e5bc9721
      Steven Rostedt authored
      After creating the TRACE_EVENT_TEMPLATE I started to look at other
      trace points to see what duplication was made. I noticed that there
      are several trace points where they are almost identical except for
      the name and the output format. Since TRACE_EVENT_TEMPLATE was successful
      in bringing down the size of trace events, I added a DEFINE_EVENT_PRINT.
      
      DEFINE_EVENT_PRINT is used just like DEFINE_EVENT is. That is, the
      DEFINE_EVENT_PRINT also uses a TRACE_EVENT_TEMPLATE, but it allows the
      developer to overwrite the print format. If there are two or more
      TRACE_EVENTS that are identical except for the name and print, then
      they can be converted to use a TRACE_EVENT_TEMPLATE. Since the
      TRACE_EVENT_TEMPLATE already does the print output, the first trace event
      would have its print format held in the TRACE_EVENT_TEMPLATE and
      be defined with a DEFINE_EVENT. The rest will use the DEFINE_EVENT_PRINT
      and override the print format.
      
      Converting the sched trace points to both DEFINE_EVENT and
      DEFINE_EVENT_PRINT. Five were converted to DEFINE_EVENT and two were
      converted to DEFINE_EVENT_PRINT.
      
      I was able to get the following:
      
      $ size kernel/sched.o-*
         text	   data	    bss	    dec	    hex	filename
        79299	   6776	   2520	  88595	  15a13	kernel/sched.o-notrace
       101941	  11896	   2584	 116421	  1c6c5	kernel/sched.o-templ
       104779	  11896	   2584	 119259	  1d1db	kernel/sched.o-trace
      
      sched.o-notrace is the scheduler compiled with no trace points.
      sched.o-templ is with the use of DEFINE_EVENT and DEFINE_EVENT_PRINT
      sched.o-trace is the current trace events.
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      e5bc9721
    • Steven Rostedt's avatar
      tracing: Create new TRACE_EVENT_TEMPLATE · ff038f5c
      Steven Rostedt authored
      There are some places in the kernel that define several tracepoints and
      they are all identical besides the name. The code to enable, disable and
      record is created for every trace point even if most of the code is
      identical.
      
      This patch adds TRACE_EVENT_TEMPLATE that lets the developer create
      a template TRACE_EVENT and create trace points with DEFINE_EVENT, which
      is based off of a given template. Each trace point used by this
      will share most of the code, and bring down the size of the kernel
      when there are several duplicate events.
      
      Usage is:
      
      TRACE_EVENT_TEMPLATE(name, proto, args, tstruct, assign, print);
      
      Which would be the same as defining a normal TRACE_EVENT.
      
      To create the trace events that the trace points will use:
      
      DEFINE_EVENT(template, name, proto, args) is done. The template
      is the name of the TRACE_EVENT_TEMPLATE to use. The name is the
      name of the trace point. The parameters proto and args must be the same
      as the proto and args of the template. If they are not the same,
      then a compile error will result. I tried hard removing this duplication
      but the C preprocessor is not powerful enough (or my CPP magic
      experience points is not at a high enough level) to not need them.
      
      A lot of trace events are coming in with new XFS development. Most of
      the trace points are identical except for the name. The following shows
      the advantage of having TRACE_EVENT_TEMPLATE:
      
      $ size fs/xfs/xfs.o.*
          text          data     bss     dec     hex filename
        452114          2788    3520  458422   6feb6 fs/xfs/xfs.o.old
        638482         38116    3744  680342   a6196 fs/xfs/xfs.o.template
        996954         38116    4480 1039550   fdcbe fs/xfs/xfs.o.trace
      
      xfs.o.old is without any tracepoints.
      xfs.o.template uses the new TRACE_EVENT_TEMPLATE.
      xfs.o.trace uses the current TRACE_EVENT macros.
      Requested-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      ff038f5c
    • Frederic Weisbecker's avatar
      perf_events: Fix bad software/trace event recursion counting · fe612672
      Frederic Weisbecker authored
      Commit 4ed7c92d
      (perf_events: Undo some recursion damage) has introduced a bad
      reference counting of the recursion context. putting the context
      behaves like getting it, dropping every software/trace events
      after the first one in a context.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arjan van de Ven <arjan@infradead.org>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <1259091502-5171-1-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      fe612672
    • Stephane Eranian's avatar
      perf_events, x86: Fix validate_event bug · 1261a02a
      Stephane Eranian authored
      The validate_event() was failing on valid event combinations. The
      function was assuming that if x86_schedule_event() returned 0, it
      meant error. But x86_schedule_event() returns the counter index and
      0 is a perfectly valid value. An error is returned if the function
      returns a negative value.
      
      Furthermore, validate_event() was also failing for event groups
      because the event->pmu was not set until after
      hw_perf_event_init().
      Signed-off-by: default avatarStephane Eranian <eranian@google.com>
      Cc: peterz@infradead.org
      Cc: paulus@samba.org
      Cc: perfmon2-devel@lists.sourceforge.net
      Cc: eranian@gmail.com
      LKML-Reference: <4b0bdf36.1818d00a.07cc.25ae@mx.google.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      --
       arch/x86/kernel/cpu/perf_event.c |    4 ++--
       1 file changed, 2 insertions(+), 2 deletions(-)
      1261a02a
    • Arnaldo Carvalho de Melo's avatar
      perf symbols: Rename find_symbol routines to find_function · fcf1203a
      Arnaldo Carvalho de Melo authored
      Paving the way for supporting variable in adition to function
      symbols.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1259074912-5924-1-git-send-email-acme@infradead.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      fcf1203a
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Remove unused wrapper routines · 727dad10
      Arnaldo Carvalho de Melo authored
      And also make xrealloc and xmalloc weak symbols so that we don't
      have this problem:
      
       /usr/lib/gcc/x86_64-redhat-linux/4.4.1/../../../../lib64/libiberty.a(xmalloc.o):
       In function `xrealloc':
       (.text+0xc0): multiple definition of `xrealloc'
       libperf.a(wrapper.o):/home/acme_unencrypted/git/linux-2.6-tip/tools/perf/util/wrapper.c:67:
       first defined here
       collect2: ld returned 1 exit status
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1259071517-3242-4-git-send-email-acme@infradead.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      727dad10
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Introduce zalloc() for the common calloc(1, N) case · 36479484
      Arnaldo Carvalho de Melo authored
      This way we type less characters and it looks more like the
      kzalloc kernel counterpart.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1259071517-3242-3-git-send-email-acme@infradead.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      36479484
    • Arnaldo Carvalho de Melo's avatar
      perf symbols: Simplify symbol machinery setup · b32d133a
      Arnaldo Carvalho de Melo authored
      And also express its configuration toggles via a struct.
      
      Now all one has to do is to call symbol__init(NULL) if the
      defaults are OK, or pass a struct symbol_conf pointer with the
      desired configuration.
      
      If a tool uses kernel_maps__find_symbol() to look at the kernel
      and modules mappings for a symbol but didn't call symbol__init()
      first, that will generate a one time warning too, alerting the
      subcommand developer that symbol__init() must be called.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1259071517-3242-2-git-send-email-acme@infradead.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b32d133a
    • Arnaldo Carvalho de Melo's avatar
      perf top: Always show the DSO column, even if its all the same · 7cc017ed
      Arnaldo Carvalho de Melo authored
      Ingo found it confusing, and I agree with that, for 'perf
      report' its OK because it is static, but for a tool refreshing
      it the eventual switch from column to summary at the top may
      seem confusing.
      Suggested-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      LKML-Reference: <1259071517-3242-1-git-send-email-acme@infradead.org>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      7cc017ed
    • John Kacur's avatar
      perf tools: Use common process_event functions for annotate and report · e74328d3
      John Kacur authored
      Prevent bit-rot in perf-annotate by using common functions where
      possible. Here we create process_events.[ch] to hold the common
      functions.
      Signed-off-by: default avatarJohn Kacur <jkacur@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: acme@redhat.com
      LKML-Reference: <1259073301-11506-3-git-send-email-jkacur@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      e74328d3
    • John Kacur's avatar
      perf tools: Add perf.data to .gitignore · c9c7ccaf
      John Kacur authored
      Signed-off-by: default avatarJohn Kacur <jkacur@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: acme@redhat.com
      LKML-Reference: <1259073301-11506-2-git-send-email-jkacur@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c9c7ccaf
    • Ingo Molnar's avatar
      Merge branch 'perf/bench' into perf/core · 1263d736
      Ingo Molnar authored
      Merge reason: Looks mergable - ready it for the merge window.
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      1263d736
    • Stephane Eranian's avatar
      perf_events: Fix bogus copy_to_user() in perf_event_read_group() · 184d3da8
      Stephane Eranian authored
      When using an event group, the value and id for non leaders events
      were wrong due to invalid offset into the outgoing buffer.
      Signed-off-by: default avatarStephane Eranian <eranian@google.com>
      Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Cc: paulus@samba.org
      Cc: perfmon2-devel@lists.sourceforge.net
      LKML-Reference: <4b0b71e1.0508d00a.075e.ffff84a3@mx.google.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      184d3da8
    • Li Zefan's avatar
      perf kmem: Add help file · b23d5767
      Li Zefan authored
      Add Documentation/perf-kmem.txt
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Acked-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
      Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: linux-mm@kvack.org <linux-mm@kvack.org>
      LKML-Reference: <4B0B6EAF.80802@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b23d5767