1. 02 3月, 2010 1 次提交
  2. 01 3月, 2010 3 次提交
  3. 29 1月, 2010 2 次提交
    • P
      perf_events, x86: Fix event constraint masks · ed8777fc
      Peter Zijlstra 提交于
      Since constraints are specified on the event number, not number
      and unit mask shorten the constraint masks so that we'll
      actually match something.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Stephane Eranian <eranian@google.com>
      LKML-Reference: <20100127221121.967610372@chello.nl>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      ed8777fc
    • S
      perf_events, x86: Improve x86 event scheduling · 1da53e02
      Stephane Eranian 提交于
      This patch improves event scheduling by maximizing the use of PMU
      registers regardless of the order in which events are created in a group.
      
      The algorithm takes into account the list of counter constraints for each
      event. It assigns events to counters from the most constrained, i.e.,
      works on only one counter, to the least constrained, i.e., works on any
      counter.
      
      Intel Fixed counter events and the BTS special event are also handled via
      this algorithm which is designed to be fairly generic.
      
      The patch also updates the validation of an event to use the scheduling
      algorithm. This will cause early failure in perf_event_open().
      
      The 2nd version of this patch follows the model used by PPC, by running
      the scheduling algorithm and the actual assignment separately. Actual
      assignment takes place in hw_perf_enable() whereas scheduling is
      implemented in hw_perf_group_sched_in() and x86_pmu_enable().
      Signed-off-by: NStephane Eranian <eranian@google.com>
      [ fixup whitespace and style nits as well as adding is_x86_event() ]
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4b5430c6.0f975e0a.1bf9.ffff85fe@mx.google.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      1da53e02
  4. 21 1月, 2010 1 次提交
  5. 09 10月, 2009 1 次提交
  6. 21 9月, 2009 1 次提交
    • I
      perf: Do the big rename: Performance Counters -> Performance Events · cdd6c482
      Ingo Molnar 提交于
      Bye-bye Performance Counters, welcome Performance Events!
      
      In the past few months the perfcounters subsystem has grown out its
      initial role of counting hardware events, and has become (and is
      becoming) a much broader generic event enumeration, reporting, logging,
      monitoring, analysis facility.
      
      Naming its core object 'perf_counter' and naming the subsystem
      'perfcounters' has become more and more of a misnomer. With pending
      code like hw-breakpoints support the 'counter' name is less and
      less appropriate.
      
      All in one, we've decided to rename the subsystem to 'performance
      events' and to propagate this rename through all fields, variables
      and API names. (in an ABI compatible fashion)
      
      The word 'event' is also a bit shorter than 'counter' - which makes
      it slightly more convenient to write/handle as well.
      
      Thanks goes to Stephane Eranian who first observed this misnomer and
      suggested a rename.
      
      User-space tooling and ABI compatibility is not affected - this patch
      should be function-invariant. (Also, defconfigs were not touched to
      keep the size down.)
      
      This patch has been generated via the following script:
      
        FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')
      
        sed -i \
          -e 's/PERF_EVENT_/PERF_RECORD_/g' \
          -e 's/PERF_COUNTER/PERF_EVENT/g' \
          -e 's/perf_counter/perf_event/g' \
          -e 's/nb_counters/nb_events/g' \
          -e 's/swcounter/swevent/g' \
          -e 's/tpcounter_event/tp_event/g' \
          $FILES
      
        for N in $(find . -name perf_counter.[ch]); do
          M=$(echo $N | sed 's/perf_counter/perf_event/g')
          mv $N $M
        done
      
        FILES=$(find . -name perf_event.*)
      
        sed -i \
          -e 's/COUNTER_MASK/REG_MASK/g' \
          -e 's/COUNTER/EVENT/g' \
          -e 's/\<event\>/event_id/g' \
          -e 's/counter/event/g' \
          -e 's/Counter/Event/g' \
          $FILES
      
      ... to keep it as correct as possible. This script can also be
      used by anyone who has pending perfcounters patches - it converts
      a Linux kernel tree over to the new naming. We tried to time this
      change to the point in time where the amount of pending patches
      is the smallest: the end of the merge window.
      
      Namespace clashes were fixed up in a preparatory patch - and some
      stylistic fallout will be fixed up in a subsequent patch.
      
      ( NOTE: 'counters' are still the proper terminology when we deal
        with hardware registers - and these sed scripts are a bit
        over-eager in renaming them. I've undone some of that, but
        in case there's something left where 'counter' would be
        better than 'event' we can undo that on an individual basis
        instead of touching an otherwise nicely automated patch. )
      Suggested-by: NStephane Eranian <eranian@google.com>
      Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: NPaul Mackerras <paulus@samba.org>
      Reviewed-by: NArjan van de Ven <arjan@linux.intel.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: <linux-arch@vger.kernel.org>
      LKML-Reference: <new-submission>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      cdd6c482
  7. 09 8月, 2009 1 次提交
  8. 26 6月, 2009 1 次提交
  9. 15 6月, 2009 1 次提交
    • P
      perf_counter: Make set_perf_counter_pending() declaration common · 9974458e
      Paul Mackerras 提交于
      At present, every architecture that supports perf_counters has to
      declare set_perf_counter_pending() in its arch-specific headers.
      This consolidates the declarations into a single declaration in one
      common place, include/linux/perf_counter.h.  On powerpc, we continue
      to provide a static inline definition of set_perf_counter_pending()
      in the powerpc hw_irq.h.
      
      Also, this removes from the x86 perf_counter.h the unused null
      definitions of {test,clear}_perf_counter_pending.
      Reported-by: NMike Frysinger <vapier.adi@gmail.com>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: benh@kernel.crashing.org
      LKML-Reference: <18998.13388.920691.523227@cargo.ozlabs.ibm.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      9974458e
  10. 29 5月, 2009 1 次提交
  11. 07 4月, 2009 1 次提交
  12. 06 4月, 2009 2 次提交
    • P
      perf_counter: unify and fix delayed counter wakeup · 925d519a
      Peter Zijlstra 提交于
      While going over the wakeup code I noticed delayed wakeups only work
      for hardware counters but basically all software counters rely on
      them.
      
      This patch unifies and generalizes the delayed wakeup to fix this
      issue.
      
      Since we're dealing with NMI context bits here, use a cmpxchg() based
      single link list implementation to track counters that have pending
      wakeups.
      
      [ This should really be generic code for delayed wakeups, but since we
        cannot use cmpxchg()/xchg() in generic code, I've let it live in the
        perf_counter code. -- Eric Dumazet could use it to aggregate the
        network wakeups. ]
      
      Furthermore, the x86 method of using TIF flags was flawed in that its
      quite possible to end up setting the bit on the idle task, loosing the
      wakeup.
      
      The powerpc method uses per-cpu storage and does appear to be
      sufficient.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: NPaul Mackerras <paulus@samba.org>
      Orig-LKML-Reference: <20090330171023.153932974@chello.nl>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      925d519a
    • P
      perf_counter: abstract wakeup flag setting in core to fix powerpc build · b6c5a71d
      Paul Mackerras 提交于
      Impact: build fix for powerpc
      
      Commit bd753921015e7905 ("perf_counter: software counter event
      infrastructure") introduced a use of TIF_PERF_COUNTERS into the core
      perfcounter code.  This breaks the build on powerpc because we use
      a flag in a per-cpu area to signal wakeups on powerpc rather than
      a thread_info flag, because the thread_info flags have to be
      manipulated with atomic operations and are thus slower than per-cpu
      flags.
      
      This fixes the by changing the core to use an abstracted
      set_perf_counter_pending() function, which is defined on x86 to set
      the TIF_PERF_COUNTERS flag and on powerpc to set the per-cpu flag
      (paca->perf_counter_pending).  It changes the previous powerpc
      definition of set_perf_counter_pending to not take an argument and
      adds a clear_perf_counter_pending, so as to simplify the definition
      on x86.
      
      On x86, set_perf_counter_pending() is defined as a macro.  Defining
      it as a static inline in arch/x86/include/asm/perf_counters.h causes
      compile failures because <asm/perf_counters.h> gets included early in
      <linux/sched.h>, and the definitions of set_tsk_thread_flag etc. are
      therefore not available in <asm/perf_counters.h>.  (On powerpc this
      problem is avoided by defining set_perf_counter_pending etc. in
      <asm/hw_irq.h>.)
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      b6c5a71d
  13. 23 12月, 2008 5 次提交
  14. 08 12月, 2008 1 次提交
    • I
      performance counters: x86 support · 241771ef
      Ingo Molnar 提交于
      Implement performance counters for x86 Intel CPUs.
      
      It's simplified right now: the PERFMON CPU feature is assumed,
      which is available in Core2 and later Intel CPUs.
      
      The design is flexible to be extended to more CPU types as well.
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      241771ef
  15. 23 10月, 2008 2 次提交
  16. 23 7月, 2008 1 次提交
    • V
      x86: consolidate header guards · 77ef50a5
      Vegard Nossum 提交于
      This patch is the result of an automatic script that consolidates the
      format of all the headers in include/asm-x86/.
      
      The format:
      
      1. No leading underscore. Names with leading underscores are reserved.
      2. Pathname components are separated by two underscores. So we can
         distinguish between mm_types.h and mm/types.h.
      3. Everything except letters and numbers are turned into single
         underscores.
      Signed-off-by: NVegard Nossum <vegard.nossum@gmail.com>
      77ef50a5
  17. 18 10月, 2007 1 次提交
  18. 11 10月, 2007 1 次提交