1. 10 10月, 2009 2 次提交
  2. 24 9月, 2009 2 次提交
  3. 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
  4. 16 9月, 2009 2 次提交
    • P
      sched: Disable wakeup balancing · 182a85f8
      Peter Zijlstra 提交于
      Sysbench thinks SD_BALANCE_WAKE is too agressive and kbuild doesn't
      really mind too much, SD_BALANCE_NEWIDLE picks up most of the
      slack.
      
      On a dual socket, quad core, dual thread nehalem system:
      
      sysbench (--num_threads=16):
      
       SD_BALANCE_WAKE-: 13982 tx/s
       SD_BALANCE_WAKE+: 15688 tx/s
      
      kbuild (-j16):
      
       SD_BALANCE_WAKE-: 47.648295846  seconds time elapsed   ( +-   0.312% )
       SD_BALANCE_WAKE+: 47.608607360  seconds time elapsed   ( +-   0.026% )
      
      (same within noise)
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <new-submission>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      182a85f8
    • P
      sh: Wire up HAVE_SYSCALL_TRACEPOINTS. · a74f7e04
      Paul Mundt 提交于
      This is necessary to get ftrace syscall tracing working again.. a fairly
      trivial and mechanical change. The one benefit is that this can also be
      enabled on sh64, despite not having its own ftrace port.
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      a74f7e04
  5. 15 9月, 2009 6 次提交
    • P
      sched: Reduce forkexec_idx · b8a543ea
      Peter Zijlstra 提交于
      If we're looking to place a new task, we might as well find the
      idlest position _now_, not 1 tick ago.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <new-submission>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      b8a543ea
    • M
      sched: Improve latencies and throughput · 0ec9fab3
      Mike Galbraith 提交于
      Make the idle balancer more agressive, to improve a
      x264 encoding workload provided by Jason Garrett-Glaser:
      
       NEXT_BUDDY NO_LB_BIAS
       encoded 600 frames, 252.82 fps, 22096.60 kb/s
       encoded 600 frames, 250.69 fps, 22096.60 kb/s
       encoded 600 frames, 245.76 fps, 22096.60 kb/s
      
       NO_NEXT_BUDDY LB_BIAS
       encoded 600 frames, 344.44 fps, 22096.60 kb/s
       encoded 600 frames, 346.66 fps, 22096.60 kb/s
       encoded 600 frames, 352.59 fps, 22096.60 kb/s
      
       NO_NEXT_BUDDY NO_LB_BIAS
       encoded 600 frames, 425.75 fps, 22096.60 kb/s
       encoded 600 frames, 425.45 fps, 22096.60 kb/s
       encoded 600 frames, 422.49 fps, 22096.60 kb/s
      
      Peter pointed out that this is better done via newidle_idx,
      not via LB_BIAS, newidle balancing should look for where
      there is load _now_, not where there was load 2 ticks ago.
      
      Worst-case latencies are improved as well as no buddies
      means less vruntime spread. (as per prior lkml discussions)
      
      This change improves kbuild-peak parallelism as well.
      Reported-by: NJason Garrett-Glaser <darkshikari@gmail.com>
      Signed-off-by: NMike Galbraith <efault@gmx.de>
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <1253011667.9128.16.camel@marge.simson.net>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      0ec9fab3
    • P
      sched: Tweak wake_idx · 78e7ed53
      Peter Zijlstra 提交于
      When merging select_task_rq_fair() and sched_balance_self() we lost
      the use of wake_idx, restore that and set them to 0 to make wake
      balancing more aggressive.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <new-submission>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      78e7ed53
    • P
      sched: Merge select_task_rq_fair() and sched_balance_self() · c88d5910
      Peter Zijlstra 提交于
      The problem with wake_idle() is that is doesn't respect things like
      cpu_power, which means it doesn't deal well with SMT nor the recent
      RT interaction.
      
      To cure this, it needs to do what sched_balance_self() does, which
      leads to the possibility of merging select_task_rq_fair() and
      sched_balance_self().
      
      Modify sched_balance_self() to:
      
        - update_shares() when walking up the domain tree,
          (it only called it for the top domain, but it should
           have done this anyway), which allows us to remove
          this ugly bit from try_to_wake_up().
      
        - do wake_affine() on the smallest domain that contains
          both this (the waking) and the prev (the wakee) cpu for
          WAKE invocations.
      
      Then use the top-down balance steps it had to replace wake_idle().
      
      This leads to the dissapearance of SD_WAKE_BALANCE and
      SD_WAKE_IDLE_FAR, with SD_WAKE_IDLE replaced with SD_BALANCE_WAKE.
      
      SD_WAKE_AFFINE needs SD_BALANCE_WAKE to be effective.
      
      Touch all topology bits to replace the old with new SD flags --
      platforms might need re-tuning, enabling SD_BALANCE_WAKE
      conditionally on a NUMA distance seems like a good additional
      feature, magny-core and small nehalem systems would want this
      enabled, systems with slow interconnects would not.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <new-submission>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      c88d5910
    • K
      sh: kfr2r09: document the PLL/FLL <-> RF relationship. · bb7001b5
      Kuninori Morimoto 提交于
      Early clock initialization sets up PLL/FLL values for optimal RF
      behaviour. As this relationship is presently undocumented, we document
      this in the script so the rationale is apparent.
      Signed-off-by: NKuninori Morimoto <morimoto.kuninori@renesas.com>
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      bb7001b5
    • K
      sh: add kycr2_delay for sh_keysc · 1f85d381
      Kuninori Morimoto 提交于
      After KYCR2 is set, udelay might become necessary if there are only a
      small number of keys attached. This patch introduces an optional delay
      through the platform data to address this problem.
      Signed-off-by: NKuninori Morimoto <morimoto.kuninori@renesas.com>
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      1f85d381
  6. 11 9月, 2009 3 次提交
  7. 10 9月, 2009 1 次提交
  8. 09 9月, 2009 2 次提交
  9. 03 9月, 2009 1 次提交
    • P
      sh: Fix up and optimize the kmap_coherent() interface. · 0906a3ad
      Paul Mundt 提交于
      This fixes up the kmap_coherent/kunmap_coherent() interface for recent
      changes both in the page fault path and the shared cache flushers, as
      well as adding in some optimizations.
      
      One of the key things to note here is that the TLB flush itself is
      deferred until the unmap, and the call in to update_mmu_cache() itself
      goes away, relying on the regular page fault path to handle the lazy
      dcache writeback if necessary.
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      0906a3ad
  10. 01 9月, 2009 2 次提交
    • P
      sh: Kill off kgdb's magical NMI debouncing. · ade315d8
      Paul Mundt 提交于
      The kgdb stub has traditionally tied in to the NMI slot, and manually
      handled debounce. Now that we have a generic way to do this instead, all
      of the stub-specific debounce silliness can be killed off.
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      ade315d8
    • P
      sh: nmi_debug support. · 1e1030dc
      Paul Mundt 提交于
      This implements support for NMI debugging that was shamelessly copied
      from the avr32 port. A bit of special magic is needed in the interrupt
      exception path given that the NMI exception handler is stubbed in to the
      regular exception handling table despite being reported in INTEVT. So we
      mangle the lookup and kick off an EXPEVT-style exception dispatch from
      the INTEVT path for exceptions that do_IRQ() has no chance of handling.
      As a result, we also drop the evt2irq() conversion from the do_IRQ() path
      and just do it in assembly.
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      1e1030dc
  11. 31 8月, 2009 1 次提交
  12. 29 8月, 2009 2 次提交
  13. 28 8月, 2009 2 次提交
  14. 25 8月, 2009 1 次提交
  15. 24 8月, 2009 6 次提交
  16. 23 8月, 2009 1 次提交
    • M
      sh: Runtime PM for SuperH Mobile platform bus devices · 6a93dde1
      Magnus Damm 提交于
      This patch is V3 of the SuperH Mobile Runtime PM platform bus
      implentation matching Rafael's Runtime PM v16.
      
      The code gets invoked from the SuperH specific Runtime PM
      platform bus functions that override the weak symbols for:
       - platform_pm_runtime_suspend()
       - platform_pm_runtime_resume()
       - platform_pm_runtime_idle()
      
      This Runtime PM implementation performs two levels of power
      management. At the time of platform bus runtime suspend the
      clock to the device is stopped instantly. Later on if all
      devices within the power domain has their clocks stopped
      then the device driver ->runtime_suspend() callbacks are
      used to save hardware register state for each device.
      
      Device driver ->runtime_suspend() calls are scheduled from
      cpuidle context using platform_pm_runtime_suspend_idle().
      When all devices have been fully suspended the processor
      is allowed to enter deep sleep from cpuidle.
      
      The runtime resume operation turns on clocks and also
      restores registers if needed. It is worth noting that the
      devices start in a suspended state and the device driver
      is responsible for calling runtime resume before accessing
      the actual hardware.
      
      In this particular platform bus implementation runtime
      resume is not allowed from interrupt context. Runtime
      suspend is however allowed from interrupt context as
      long as the synchronous functions are avoided.
      
      [ updated for v17 -- PFM. ]
      Signed-off-by: NMagnus Damm <damm@igel.co.jp>
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      6a93dde1
  17. 22 8月, 2009 2 次提交
  18. 21 8月, 2009 3 次提交
    • M
      sh: Handle the DWARF op, DW_CFA_undefined · 5580e904
      Matt Fleming 提交于
      Allow a DWARF register to have an undefined value. When applied to the
      DWARF return address register this lets lets us label a function as
      having no direct caller, e.g. kernel_thread_helper().
      Signed-off-by: NMatt Fleming <matt@console-pimps.org>
      5580e904
    • M
      sh: unwinder: Introduce UNWINDER_BUG() and UNWINDER_BUG_ON() · b344e24a
      Matt Fleming 提交于
      We can't assume that if we execute the unwinder code and the unwinder
      was already running that it has faulted. Clearly two kernel threads can
      invoke the unwinder at the same time and may be running simultaneously.
      
      The previous approach used BUG() and BUG_ON() in the unwinder code to
      detect whether the unwinder was incapable of unwinding the stack, and
      that the next available unwinder should be used instead. A better
      approach is to explicitly invoke a trap handler to switch unwinders when
      the current unwinder cannot continue.
      Signed-off-by: NMatt Fleming <matt@console-pimps.org>
      b344e24a
    • M
      sh: unwinder: Set the flags for DW_CFA_val_offset ops as DWARF_VAL_OFFSET · 97efbbd5
      Matt Fleming 提交于
      The handling of DW_CFA_val_offset ops was incorrectly using the
      DWARF_REG_OFFSET flag but the register's value cannot be calculated
      using the DWARF_REG_OFFSET method. Create a new flag to indicate that a
      different method must be used to calculate the register's value even
      though there is no implementation for DWARF_VAL_OFFSET yet; it's mainly
      just a place holder.
      Signed-off-by: NMatt Fleming <matt@console-pimps.org>
      97efbbd5