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2011-10-10perf, x86: Implement IBS initializationRobert Richter1-1/+0
This patch implements IBS feature detection and initialzation. The code is shared between perf and oprofile. If IBS is available on the system for perf, a pmu is setup. Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1316597423-25723-3-git-send-email-robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-06oprofile/x86: make AMD IBS hotplug capableRobert Richter1-1/+1
Current IBS code is not hotplug capable. An offline cpu might not be initialized or deinitialized properly. This patch fixes this by removing on_each_cpu() functions. The IBS init/deinit code is executed in the per-cpu functions model->setup_ctrs() and model->cpu_down() which are also called by hotplug notifiers. model->cpu_down() replaces model->exit() that became obsolete. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: return -EBUSY if counters are already reservedRobert Richter1-1/+1
In case a counter is already reserved by the watchdog or perf_event subsystem, oprofile ignored this counters silently. This case is handled now and oprofile_setup() now reports an error. Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-02-26oprofile/x86: add comment to counter-in-use warningNaga Chumbalkar1-0/+9
Currently, oprofile fails silently on platforms where a non-OS entity such as the system firmware "enables" and uses a performance counter. There is a warning in the code for this case. The warning indicates an already running counter. If oprofile doesn't collect data, then try using a different performance counter on your platform to monitor the desired event. Delete the counter from the desired event by editing the /usr/share/oprofile/<cpu_type>/<cpu>/events file. If the event cannot be monitored by any other counter, contact your hardware or BIOS vendor. Cc: Shashi Belur <shashi-kiran.belur@hp.com> Cc: Tony Jones <tonyj@suse.de> Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-02-26oprofile/x86: warn user if a counter is already activeRobert Richter1-0/+11
This patch generates a warning if a counter is already active. Implemented for AMD and P6 models. P4 is not supported. Cc: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Cc: Shashi Belur <shashi-kiran.belur@hp.com> Cc: Tony Jones <tonyj@suse.de> Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-09-21perf: Do the big rename: Performance Counters -> Performance EventsIngo Molnar1-1/+1
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: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Arjan 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: Ingo Molnar <mingo@elte.hu>
2009-07-20x86/oprofile: Implement op_x86_virt_to_phys()Robert Richter1-0/+1
This patch implements a common x86 function to convert virtual counter numbers to physical. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Remove unused num_virt_controls from struct op_x86_model_specRobert Richter1-1/+0
The member num_virt_controls of struct op_x86_model_spec is not used. This patch removes it. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Remove const qualifier from struct op_x86_model_specRobert Richter1-4/+4
This patch removes the const qualifier from struct op_x86_model_spec to make model parameters changable. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Introduce op_x86_phys_to_virt()Robert Richter1-0/+1
This new function translates physical to virtual counter numbers. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Implement performance counter multiplexingJason Yeh1-0/+7
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>
2009-06-12Merge commit 'tip/perfcounters-for-linus' into oprofile/masterRobert Richter1-1/+1
Conflicts: arch/x86/oprofile/op_model_ppro.c Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: use 64 bit values to save MSR statesRobert Richter1-7/+2
This patch removes struct op_saved_msr and replaces it by an u64 variable. This makes code easier and it is possible to use 64 bit MSR functions. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: replace CTR*_IS_RESERVED macrosRobert Richter1-3/+0
The patch replaces all CTR*_IS_RESERVED macros. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: replace CTRL_SET_*ACTIVE macrosRobert Richter1-2/+0
The patch replaces all CTRL_SET_*ACTIVE macros. 64 bit MSR functions and 64 bit counter values are used now. The code uses bit masks from <asm/intel_arch_perfmon.h>. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: replace macros to calculate control registerRobert Richter1-4/+11
This patch introduces op_x86_get_ctrl() to calculate the value of the performance control register. This is generic code usable for all models. The event and reserved masks are model specific and stored in struct op_x86_model_spec. 64 bit MSR functions are used now. The patch removes many hard to read macros used for ctrl calculation. The function op_x86_get_ctrl() is common code and the first step to further merge performance counter implementations for x86 models. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: pass the model to setup_ctrs() functionsRobert Richter1-1/+2
In follow-on patches the setup_ctrs() functions will need data that describes the model. This patch extends the function argument list to pass a pointer of the model to these function. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: fix and cleanup CTRL_SET_* macrosRobert Richter1-8/+10
This patch fixes missing braces around macro parameters. Macro definitions from intel_arch_perfmon.h are used where possible. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: move common macros to op_x86_model.hRobert Richter1-0/+9
There are duplicate macro implementations in model specific code. This patch moves all common macros to op_x86_model.h. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: minor style changes in struct op_x86_model_specRobert Richter1-11/+11
Some vertical alignments. Variables are now located in the beginning of the struct. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-10x86/oprofile: moving arch_perfmon counter setup to op_x86_model_spec.initRobert Richter1-2/+0
The function arch_perfmon_init() in nmi_int.c is model specific. This patch moves it to op_model_ppro.c by using the init function pointer in struct op_x86_model_spec. Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-10Revert "oprofile: discover counters for op ppro too"Robert Richter1-1/+1
This reverts commit 59512900baab03c5629f2ff5efad1d5d4e682ece. arch_perfmon_setup_counters() is actually never called for ppro, so there is no code that changes the numbers in op_ppro_spec. The patch as it is has no effect. Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-10-15Merge branch 'oprofile/x86-oprofile-for-tip' into oprofile/oprofile-for-tipRobert Richter1-3/+6
Conflicts: arch/x86/oprofile/op_model_ppro.c
2008-10-15oprofile: more whitespace fixesRobert Richter1-2/+2
Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-10-13oprofile: discover counters for op ppro tooAndi Kleen1-1/+1
Discover number of counters for all family 6 models even when not in arch perfmon mode. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-10-13oprofile: Implement Intel architectural perfmon supportAndi Kleen1-0/+3
Newer Intel CPUs (Core1+) have support for architectural events described in CPUID 0xA. See the IA32 SDM Vol3b.18 for details. The advantage of this is that it can be done without knowing about the specific CPU, because the CPU describes by itself what performance events are supported. This is only a fallback because only a limited set of 6 events are supported. This allows to do profiling on Nehalem and on Atom systems (later not tested) This patch implements support for that in oprofile's Intel Family 6 profiling module. It also has the advantage of supporting an arbitary number of events now as reported by the CPU. Also allow arbitary counter widths >32bit while we're at it. Requires a patched oprofile userland to support the new architecture. v2: update for latest oprofile tree remove force_arch_perfmon Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-10-13oprofile: drop const in num counters fieldAndi Kleen1-2/+2
allow to modify it at runtime Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-09-24Revert "Oprofile Multiplexing Patch"Robert Richter1-3/+0
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 Yeh1-0/+3
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>
2008-07-26x86/oprofile: renaming athlon_*() into op_amd_*()Robert Richter1-1/+1
These functions contain code for all AMD CPUs. The new names fit better. Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-26x86/oprofile: introduce model specific init/exit functionsRobert Richter1-0/+2
This patch implements model specific OProfile init/exit functions for x86 CPUs. Though there is more rework needed at the initialization code, this new introduced functions allow it to keep model specific code in the corresponding op_model_*.c files. The function interface is the same as for oprofile_arch_init/exit(). 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>
2007-10-20spelling fixes: arch/i386/Simon Arlott1-1/+1
Spelling fixes in arch/i386/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-10-11i386: move oprofileThomas Gleixner1-0/+51
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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