1. 31 Aug, 2011 9 commits
  2. 07 Jul, 2011 2 commits
  3. 05 Jul, 2011 1 commit
  4. 29 Jun, 2011 1 commit
    • Mark Rutland's avatar
      ARM: 6974/1: pmu: refactor reservation · f12482c9
      Mark Rutland authored
      Currently, PMU platform_device reservation relies on some minor abuse
      of the platform_device::id field for determining the type of PMU. This
      is problematic for device tree based probing, where the ID cannot be
      controlled.
      
      This patch removes reliance on the id field, and depends on each PMU's
      platform driver to figure out which type it is. As all PMUs handled by
      the current platform_driver name "arm-pmu" are CPU PMUs, this
      convention is hardcoded. New PMU types can be supported through the use
      of {of,platform}_device_id tables
      Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
      Acked-by: default avatarJamie Iles <jamie@jamieiles.com>
      Acked-by: default avatarWill Deacon <will.deacon@arm.com>
      Cc: Rob Herring <rob.herring@calxeda.com>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      f12482c9
  5. 20 May, 2011 1 commit
  6. 27 Apr, 2011 1 commit
  7. 10 Apr, 2011 1 commit
  8. 26 Mar, 2011 2 commits
  9. 17 Feb, 2011 1 commit
  10. 10 Feb, 2011 1 commit
  11. 16 Dec, 2010 1 commit
    • Peter Zijlstra's avatar
      perf: Dynamic pmu types · 2e80a82a
      Peter Zijlstra authored
      Extend the perf_pmu_register() interface to allow for named and
      dynamic pmu types.
      
      Because we need to support the existing static types we cannot use
      dynamic types for everything, hence provide a type argument.
      
      If we want to enumerate the PMUs they need a name, provide one.
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      LKML-Reference: <20101117222056.259707703@chello.nl>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      2e80a82a
  12. 04 Dec, 2010 2 commits
    • Will Deacon's avatar
      ARM: 6521/1: perf: use raw_spinlock_t for pmu_lock · 961ec6da
      Will Deacon authored
      For kernels built with PREEMPT_RT, critical sections protected
      by standard spinlocks are preemptible. This is not acceptable
      on perf as (a) we may be scheduled onto a different CPU whilst
      reading/writing banked PMU registers and (b) the latency when
      reading the PMU registers becomes unpredictable.
      
      This patch upgrades the pmu_lock spinlock to a raw_spinlock
      instead.
      Reported-by: default avatarJamie Iles <jamie@jamieiles.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      961ec6da
    • Will Deacon's avatar
      ARM: 6512/1: perf: fix warnings generated by sparse · 4d6b7a77
      Will Deacon authored
      Russell reported a number of warnings coming from sparse when
      checking the ARM perf_event.c files:
      
      | perf_event.c seems to also have problems too:
      |
      |   CHECK   arch/arm/kernel/perf_event.c
      |   arch/arm/kernel/perf_event.c:37:1: warning: symbol 'pmu_lock' was not declared. Should it be static?
      |   arch/arm/kernel/perf_event.c:70:1: warning: symbol 'cpu_hw_events' was not declared. Should it be static?
      |   arch/arm/kernel/perf_event.c:1006:1: warning: symbol 'armv6pmu_enable_event' was not declared. Should it be static?
      |   arch/arm/kernel/perf_event.c:1113:1: warning: symbol 'armv6pmu_stop' was not declared. Should it be static?
      |   arch/arm/kernel/perf_event.c:1956:6: warning: symbol 'armv7pmu_enable_event' was not declared. Should it be static?
      |   arch/arm/kernel/perf_event.c:3072:14: warning: incorrect type in argument 1 (different address spaces)
      |   arch/arm/kernel/perf_event.c:3072:14:    expected void const volatile [noderef] <asn:1>*<noident>
      |   arch/arm/kernel/perf_event.c:3072:14:    got struct frame_tail *tail
      |   arch/arm/kernel/perf_event.c:3074:49: warning: incorrect type in argument 2 (different address spaces)
      |   arch/arm/kernel/perf_event.c:3074:49:    expected void const [noderef] <asn:1>*from
      |   arch/arm/kernel/perf_event.c:3074:49:    got struct frame_tail *tail
      
      This patch resolves these issues so we can live in silence
      again.
      Reported-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      4d6b7a77
  13. 26 Nov, 2010 1 commit
  14. 25 Nov, 2010 5 commits
  15. 07 Nov, 2010 1 commit
  16. 18 Oct, 2010 1 commit
    • Peter Zijlstra's avatar
      irq_work: Add generic hardirq context callbacks · e360adbe
      Peter Zijlstra authored
      Provide a mechanism that allows running code in IRQ context. It is
      most useful for NMI code that needs to interact with the rest of the
      system -- like wakeup a task to drain buffers.
      
      Perf currently has such a mechanism, so extract that and provide it as
      a generic feature, independent of perf so that others may also
      benefit.
      
      The IRQ context callback is generated through self-IPIs where
      possible, or on architectures like powerpc the decrementer (the
      built-in timer facility) is set to generate an interrupt immediately.
      
      Architectures that don't have anything like this get to do with a
      callback from the timer tick. These architectures can call
      irq_work_run() at the tail of any IRQ handlers that might enqueue such
      work (like the perf IRQ handler) to avoid undue latencies in
      processing the work.
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: default avatarKyle McMartin <kyle@mcmartin.ca>
      Acked-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      [ various fixes ]
      Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
      LKML-Reference: <1287036094.7768.291.camel@yhuang-dev>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      e360adbe
  17. 14 Oct, 2010 1 commit
  18. 11 Oct, 2010 1 commit
  19. 09 Sep, 2010 6 commits
    • Peter Zijlstra's avatar
      perf: Remove the sysfs bits · 15ac9a39
      Peter Zijlstra authored
      Neither the overcommit nor the reservation sysfs parameter were
      actually working, remove them as they'll only get in the way.
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: paulus <paulus@samba.org>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      15ac9a39
    • Peter Zijlstra's avatar
      perf: Rework the PMU methods · a4eaf7f1
      Peter Zijlstra authored
      Replace pmu::{enable,disable,start,stop,unthrottle} with
      pmu::{add,del,start,stop}, all of which take a flags argument.
      
      The new interface extends the capability to stop a counter while
      keeping it scheduled on the PMU. We replace the throttled state with
      the generic stopped state.
      
      This also allows us to efficiently stop/start counters over certain
      code paths (like IRQ handlers).
      
      It also allows scheduling a counter without it starting, allowing for
      a generic frozen state (useful for rotating stopped counters).
      
      The stopped state is implemented in two different ways, depending on
      how the architecture implemented the throttled state:
      
       1) We disable the counter:
          a) the pmu has per-counter enable bits, we flip that
          b) we program a NOP event, preserving the counter state
      
       2) We store the counter state and ignore all read/overflow events
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: paulus <paulus@samba.org>
      Cc: stephane eranian <eranian@googlemail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Cyrill Gorcunov <gorcunov@gmail.com>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Yanmin <yanmin_zhang@linux.intel.com>
      Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
      Cc: David Miller <davem@davemloft.net>
      Cc: Michael Cree <mcree@orcon.net.nz>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      a4eaf7f1
    • Peter Zijlstra's avatar
      perf: Per PMU disable · 33696fc0
      Peter Zijlstra authored
      Changes perf_disable() into perf_pmu_disable().
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: paulus <paulus@samba.org>
      Cc: stephane eranian <eranian@googlemail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Cyrill Gorcunov <gorcunov@gmail.com>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Yanmin <yanmin_zhang@linux.intel.com>
      Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
      Cc: David Miller <davem@davemloft.net>
      Cc: Michael Cree <mcree@orcon.net.nz>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      33696fc0
    • Peter Zijlstra's avatar
      perf: Reduce perf_disable() usage · 24cd7f54
      Peter Zijlstra authored
      Since the current perf_disable() usage is only an optimization,
      remove it for now. This eases the removal of the __weak
      hw_perf_enable() interface.
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: paulus <paulus@samba.org>
      Cc: stephane eranian <eranian@googlemail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Cyrill Gorcunov <gorcunov@gmail.com>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Yanmin <yanmin_zhang@linux.intel.com>
      Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
      Cc: David Miller <davem@davemloft.net>
      Cc: Michael Cree <mcree@orcon.net.nz>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      24cd7f54
    • Peter Zijlstra's avatar
      perf: Register PMU implementations · b0a873eb
      Peter Zijlstra authored
      Simple registration interface for struct pmu, this provides the
      infrastructure for removing all the weak functions.
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: paulus <paulus@samba.org>
      Cc: stephane eranian <eranian@googlemail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Cyrill Gorcunov <gorcunov@gmail.com>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Yanmin <yanmin_zhang@linux.intel.com>
      Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
      Cc: David Miller <davem@davemloft.net>
      Cc: Michael Cree <mcree@orcon.net.nz>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b0a873eb
    • Peter Zijlstra's avatar
      perf: Deconstify struct pmu · 51b0fe39
      Peter Zijlstra authored
      sed -ie 's/const struct pmu\>/struct pmu/g' `git grep -l "const struct pmu\>"`
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: paulus <paulus@samba.org>
      Cc: stephane eranian <eranian@googlemail.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Cyrill Gorcunov <gorcunov@gmail.com>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Yanmin <yanmin_zhang@linux.intel.com>
      Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
      Cc: David Miller <davem@davemloft.net>
      Cc: Michael Cree <mcree@orcon.net.nz>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      51b0fe39
  20. 02 Sep, 2010 1 commit