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path: root/drivers/oprofile/oprof.c
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2011-05-24oprofile: Use linux/mutex.hAnton Blanchard1-1/+1
The oprofile code is still including asm/mutex.h instead of linux/mutex.h. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-10-12oprofile: disable write access to oprofilefs while profiler is runningRobert Richter1-15/+6
Oprofile counters are setup when profiling is disabled. Thus, writing to oprofilefs has no immediate effect. Changes are updated only after oprofile is reenabled. To keep userland and kernel states synchronized, we now allow configuration of oprofile only if profiling is disabled. In this case it checks if the profiler is running and then disables write access to oprofilefs by returning -EBUSY. The change should be backward compatible with current oprofile userland daemon. Acked-by: Maynard Johnson <maynardj@us.ibm.com> Cc: William Cohen <wcohen@redhat.com> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-08-31oprofile: don't call arch exit code from init code on failureWill Deacon1-9/+2
oprofile_init calls oprofile_arch_init to initialise the architecture-specific backend code. If this backend code returns failure, oprofile_arch_exit is called immediately, making it difficult to allocate and free resources correctly. This patch removes the oprofile_arch_exit call from oprofile_init, meaning that all architectures must ensure that oprofile_arch_init cleans up any mess it's made before returning an error. As far as I can tell, this only affects the code for ARM. Cc: Robert Richter <robert.richter@amd.com> Cc: Matt Fleming <matt@console-pimps.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-03-02oprofile: convert oprofile from timer_hook to hrtimerMartin Schwidefsky1-4/+8
Oprofile is currently broken on systems running with NOHZ enabled. A maximum of 1 tick is accounted via the timer_hook if a cpu sleeps for a longer period of time. This does bad things to the percentages in the profiler output. To solve this problem convert oprofile to use a restarting hrtimer instead of the timer_hook. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Adding switch counter to oprofile statistic variablesRobert Richter1-2/+5
This patch moves the multiplexing switch counter from x86 code to common oprofile statistic variables. Now the value will be available and usable for all architectures. The initialization and incrementation also moved to common code. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Grouping multiplexing code in oprof.cRobert Richter1-51/+49
This patch moves multiplexing code to a single section of code. This reduces the use of #ifdefs especially within functions. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Remove oprofile_multiplexing_init()Robert Richter1-14/+0
oprofile_multiplexing_init() can be removed when moving the initialization of oprofile_time_slice to oprofile_create_files(). Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Rename variable timeout_jiffies and move to oprofile_files.cRobert Richter1-5/+4
This patch renames timeout_jiffies into an oprofile specific name. The macro MULTIPLEXING_TIMER_DEFAULT is changed too. Also, since this variable is controlled using oprofilefs, its definition is moved to oprofile_files.c. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: oprofile_set_timeout(), return with error for invalid argsRobert Richter1-3/+8
Return with -EINVAL for invalid parameters instead of setting the default value in oprofile_set_timeout(). Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Implement performance counter multiplexingJason Yeh1-0/+78
The number of hardware counters is limited. The multiplexing feature enables OProfile to gather more events than counters are provided by the hardware. This is realized by switching between events at an user specified time interval. A new file (/dev/oprofile/time_slice) is added for the user to specify the timer interval in ms. If the number of events to profile is higher than the number of hardware counters available, the patch will schedule a work queue that switches the event counter and re-writes the different sets of values into it. The switching mechanism needs to be implemented for each architecture to support multiplexing. This patch only implements AMD CPU support, but multiplexing can be easily extended for other models and architectures. There are follow-on patches that rework parts of this patch. Signed-off-by: Jason Yeh <jason.yeh@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-01-22cpumask: modifiy oprofile initializationRobert Richter1-8/+1
Delta patch to f7df8ed164996cd2c6aca9674388be6ef78d8b37 for tip/cpus4096. Moved initialization to sync_start()/sync_stop(). No changes needed in buffer_sync.h and oprof.c anymore. Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-11cpumask: convert misc driver functionsRusty Russell1-1/+8
Impact: use new cpumask API. Convert misc driver functions to use struct cpumask. To Do: - Convert iucv_buffer_cpumask to cpumask_var_t. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Dean Nelson <dcn@sgi.com> Cc: Robert Richter <robert.richter@amd.com> Cc: oprofile-list@lists.sf.net Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: virtualization@lists.osdl.org Cc: xen-devel@lists.xensource.com Cc: Ursula Braun <ursula.braun@de.ibm.com> Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org
2008-12-16oprofile: rename kernel-wide identifiersRobert Richter1-2/+2
This patch renames kernel-wide identifiers to something more oprofile specific names. Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-10-16oprofile: fixing whitespaces in drivers/oprofile/*Robert Richter1-1/+1
Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-10-15oprofile: whitespace fixesRobert Richter1-12/+12
Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-09-24Revert "Oprofile Multiplexing Patch"Robert Richter1-55/+3
Reverting commit 1a960b402a51d80abf54e3f8e4972374ffe5f22d for the main branch. Multiplexing will be tracked on a separate feature branch. Conflicts: arch/x86/oprofile/nmi_int.c
2008-07-26Oprofile Multiplexing PatchJason Yeh1-3/+55
This patch introduces multiplexing support for the Oprofile kernel module. It basically adds a new function pointer in oprofile_operator allowing each architecture to supply its callback to switch between different sets of event when the timer expires. Userspace tools can modify the time slice through /dev/oprofile/time_slice. It also modifies the number of counters exposed to the userspace through /dev/oprofile. For example, the number of counters for AMD CPUs are changed to 32 and multiplexed in the sets of 4. Signed-off-by: Jason Yeh <jason.yeh@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-07-20[CELL] oprofile: add support to OProfile for profiling CELL BE SPUsBob Nelson1-0/+28
From: Maynard Johnson <mpjohn@us.ibm.com> This patch updates the existing arch/powerpc/oprofile/op_model_cell.c to add in the SPU profiling capabilities. In addition, a 'cell' subdirectory was added to arch/powerpc/oprofile to hold Cell-specific SPU profiling code. Exports spu_set_profile_private_kref and spu_get_profile_private_kref which are used by OProfile to store private profile information in spufs data structures. Also incorporated several fixes from other patches (rrn). Check pointer returned from kzalloc. Eliminated unnecessary cast. Better error handling and cleanup in the related area. 64-bit unsigned long parameter was being demoted to 32-bit unsigned int and eventually promoted back to unsigned long. Signed-off-by: Carl Love <carll@us.ibm.com> Signed-off-by: Maynard Johnson <mpjohn@us.ibm.com> Signed-off-by: Bob Nelson <rrnelson@us.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org>
2006-06-25[PATCH] oprofile: convert from semaphores to mutexesMarkus Armbruster1-13/+13
Signed-off-by: Markus Armbruster <armbru@redhat.com> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: John Levon <levon@movementarian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds1-0/+188
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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