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2009-09-21perf: Do the big rename: Performance Counters -> Performance EventsIngo Molnar2-3/+3
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>
2009-08-04arch/x86/oprofile/op_model_amd.c: fix op_amd_handle_ibs() return typeAndrew Morton1-5/+3
arch/x86/oprofile/op_model_amd.c: In function 'op_amd_handle_ibs': arch/x86/oprofile/op_model_amd.c:217: warning: no return statement in function returning non-void Fix this by making op_amd_handle_ibs() return void. Cc: Robert Richter <robert.richter@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-08-04Revert "x86: oprofile/op_model_amd.c set return values for op_amd_handle_ibs()"Robert Richter1-5/+2
This reverts commit 21e70878215f620fe99ea7d7c74bc641aeec932f. Instead Andrew's patch will be applied he posted at the same time. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Small coding style fixesRobert Richter1-3/+2
Some small coding style fixes. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Add counter reservation check for virtual countersRobert Richter1-3/+1
This patch adds a check for the availability of a counter. A virtual counter is used only if its physical counter is not reserved. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Implement op_x86_virt_to_phys()Robert Richter3-1/+8
This patch implements a common x86 function to convert virtual counter numbers to physical. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Adding switch counter to oprofile statistic variablesRobert Richter1-7/+0
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>
2009-07-20x86/oprofile: Implement mux_clone()Robert Richter1-14/+23
To setup a counter for all cpus, its structure is cloned from cpu 0. This patch implements mux_clone() to do this part for multiplexing data. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Enable multiplexing only if the model supports itRobert Richter1-3/+9
This patch checks if the model supports multiplexing. Only then multiplexing will be enabled. The code is added to the common x86 initialization. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Add function has_mux() to check multiplexing supportRobert Richter1-1/+18
The check is used to prevent running multiplexing code for models not supporting multiplexing. Before, the code was running but without effect. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Modify initialization of num_virt_countersRobert Richter3-3/+3
Models that do not yet support counter multiplexing have to setup num_virt_counters. This patch implements the setup from num_counters if num_virt_counters is not set. Thus, num_virt_counters must be setup only for multiplexing support. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Remove unused num_virt_controls from struct op_x86_model_specRobert Richter4-5/+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 Richter5-10/+10
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>
2009-07-20x86/oprofile: Moving nmi_cpu_switch() in nmi_int.cRobert Richter1-74/+70
This patch moves some code in nmi_int.c to get a single separate multiplexing code section. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Moving nmi_cpu_save/restore_mpx_registers() in nmi_int.cRobert Richter1-28/+24
This patch moves some code in nmi_int.c to get a single separate multiplexing code section. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Moving nmi_setup_cpu_mux() in nmi_int.cRobert Richter1-26/+19
This patch moves some code in nmi_int.c to get a single separate multiplexing code section. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Implement multiplexing setup/shutdown functionsRobert Richter1-36/+40
This patch implements nmi_setup_mux() and nmi_shutdown_mux() functions to setup/shutdown multiplexing. Multiplexing code in nmi_int.c is now much more separated. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Grouping multiplexing code in op_model_amd.cRobert Richter1-34/+41
This patch moves some multiplexing code to the new function op_mux_fill_in_addresses(). Also, the whole multiplexing code is now at a single location. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Introduce op_x86_phys_to_virt()Robert Richter3-69/+55
This new function translates physical to virtual counter numbers. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Fix initialization of switch_indexRobert Richter1-7/+9
Variable switch_index must be initialized for each cpu. This patch fixes the initialization by moving it to the per-cpu init function nmi_cpu_setup(). Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Use per_cpu() instead of __get_cpu_var()Robert Richter1-2/+2
__get_cpu_var() calls smp_processor_id(). When the cpu id is already known, instead use per_cpu() to avoid generating the id again. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20x86/oprofile: Fix usage of NUM_CONTROLS/NUM_COUNTERS macrosRobert Richter1-2/+2
Use the corresponding macros when iterating over counter and control registers. Since NUM_CONTROLS and NUM_COUNTERS are equal for AMD cpus the fix is more a cosmetical change. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-20oprofile: Implement performance counter multiplexingJason Yeh6-20/+267
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>
2009-07-14x86/oprofile: Whitespaces changes onlyRobert Richter4-20/+20
This patch fixes whitespace changes of code that will be touched in follow-on patches. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-14x86/oprofile: Rework and simplify nmi_cpu_setup()Robert Richter1-10/+3
This patch removes the function nmi_save_registers(). Per-cpu code is now executed only in the function nmi_cpu_setup(). Also, it renames the per-cpu function nmi_restore_registers() to nmi_cpu_restore_registers(). Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-14x86/oprofile: Fix cast of counter valueRobert Richter2-5/+5
When casting the counter value to a 64 bit value in 32 bit mode, sign extension may lead to broken counter values. This patch fixes this by casting to (u64) instead of (s64). Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-14Merge commit 'v2.6.31-rc3'; commit 'tip/oprofile' into oprofile/coreRobert Richter1-1/+1
Conflicts: drivers/oprofile/oprofile_stats.c drivers/usb/otg/Kconfig drivers/usb/otg/Makefile Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-07-10x86/oprofile: rename kernel parameter for architectural perfmon to arch_perfmonRobert Richter1-1/+1
The short name of the achitecture is 'arch_perfmon'. This patch changes the kernel parameter to use this name. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-18x86: oprofile/op_model_amd.c set return values for op_amd_handle_ibs()Jaswinder Singh Rajput1-2/+5
op_amd_handle_ibs() should return 0 when IBS is not present or not defined. Fix compilation warning: CC [M] arch/x86/oprofile/op_model_amd.o arch/x86/oprofile/op_model_amd.c: In function ‘op_amd_handle_ibs’: arch/x86/oprofile/op_model_amd.c:217: warning: no return statement in function returning non-void Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-12x86/oprofile: fix initialization of arch_perfmon for core_i7Robert Richter1-2/+3
Commit: e419294 x86/oprofile: moving arch_perfmon counter setup to op_x86_model_spec.init introduced a bug in the initialization of core_i7 leading to the incorrect model setup to &op_ppro_spec. This patch fixes this. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-12Merge commit 'tip/perfcounters-for-linus' into oprofile/masterRobert Richter3-4/+13
Conflicts: arch/x86/oprofile/op_model_ppro.c Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: introduce oprofile_add_data64()Robert Richter1-18/+9
The IBS implemention writes 64 bit register values to the cpu buffer by writing two 32 values using oprofile_add_data(). This patch introduces oprofile_add_data64() to write a single 64 bit value to the buffer. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: use 64 bit values in IBS functionsRobert Richter1-70/+61
The IBS code internally uses 32 bit values (a low and a high value) to represent a 64 bit value. This patch changes this and now 64 bit values are used instead. 64 bit MSR functions can be used now. No functional changes. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: remove some local variables in MSR save/restore functionsRobert Richter1-8/+4
The patch removes some local variables in these functions. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: use 64 bit values to save MSR statesRobert Richter2-27/+10
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: use 64 bit wrmsr functionsRobert Richter2-9/+10
This patch replaces some wrmsr() functions with wrmsrl(). Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: replace CTR*_IS_RESERVED macrosRobert Richter4-18/+15
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 Richter3-18/+16
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 CTR_OVERFLOWED macrosRobert Richter3-17/+15
The patch replaces all CTR_OVERFLOWED macros. 64 bit MSR functions and 64 bit counter values are used now. Thus, it will be easier to later extend the models to use more than 32 bit width counters. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: replace macros to calculate control registerRobert Richter4-45/+60
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 Richter5-5/+9
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: remove unused macros for AMD virtualization profilingRobert Richter1-5/+0
The use of the macros has no effect. The oprofilefs has to be extended first to support these features. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: fix and cleanup CTRL_SET_* macrosRobert Richter2-9/+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: remove MSR macros for p4 cpusRobert Richter1-20/+19
The macros CTRL_READ() and CTRL_WRITE() make the code hard to read and maintain. This patch replaces them by rdmsr()/wrmsr() functions and simplifies the code. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: remove MSR macros for ppro cpusRobert Richter1-11/+8
The macros CTRL_READ() and CTRL_WRITE() make the code hard to read and maintain. This patch replaces them by rdmsr()/wrmsr() functions and simplifies the code. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: remove MSR macros for AMD cpusRobert Richter1-17/+12
The macros CTRL_READ() and CTRL_WRITE() make the code hard to read and maintain. This patch replaces them by rdmsr()/wrmsr() functions and simplifies the code. Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11x86/oprofile: move common macros to op_x86_model.hRobert Richter4-18/+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: simplify AMD cpu init codeRobert Richter1-8/+7
Signed-off-by: Robert Richter <robert.richter@amd.com>
2009-06-11Merge branch 'linus' into perfcounters/coreIngo Molnar1-4/+23
Conflicts: arch/x86/kernel/irqinit.c arch/x86/kernel/irqinit_64.c arch/x86/kernel/traps.c arch/x86/mm/fault.c include/linux/sched.h kernel/exit.c
2009-06-11x86/oprofile: remove #ifdefs in ibs functionsRobert Richter1-34/+46
IBS code is moved to separate functions. This allows the removal of #ifdefs in functions. Signed-off-by: Robert Richter <robert.richter@amd.com>
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