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2010-12-19oprofile, x86: Add support for AMD family 15hRobert Richter1-0/+3
This patch adds support for AMD family 15h (Interlagos/Valencia/ Zambezi) cpus. Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-10-15oprofile, x86: Add support for AMD family 14hRobert Richter1-0/+3
This patch adds support for AMD family 14h (Ontario/Zacate) cpus. Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-10-15oprofile, x86: Add support for AMD family 12hRobert Richter1-0/+3
This patch adds support for AMD family 12h (Llano) cpus. Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-10-01oprofile, x86: Simplify init/exit functionsRobert Richter1-8/+1
Now, that we only call the exit function if init succeeds with commit: 979048e oprofile: don't call arch exit code from init code on failure we can simplify the x86 init/exit functions too. Variable using_nmi becomes obsolete. Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-09-21oprofile: Add Support for Intel CPU Family 6 / Model 29Jiri Olsa1-0/+1
This patch adds CPU type detection for dunnington processor (Family 6 / Model 29) to be identified as core 2 family cpu type (wikipedia source). I tested oprofile on Intel(R) Xeon(R) CPU E7440 reporting itself as model 29, and it runs without an issue. Spec: http://www.intel.com/Assets/en_US/PDF/specupdate/320336.pdf Signed-off-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-09-16oprofile: Add Support for Intel CPU Family 6 / Model 22 (Intel Celeron 540)Patrick Simmons1-1/+3
This patch adds CPU type detection for the Intel Celeron 540, which is part of the Core 2 family according to Wikipedia; the family and ID pair is absent from the Volume 3B table referenced in the source code comments. I have tested this patch on an Intel Celeron 540 machine reporting itself as Family 6 Model 22, and OProfile runs on the machine without issue. Spec: http://download.intel.com/design/mobile/SPECUPDT/317667.pdf Signed-off-by: Patrick Simmons <linuxrocks123@netscape.net> Acked-by: Andi Kleen <ak@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-09-01oprofile, x86: fix init_sysfs() function stubRobert Richter1-2/+4
The use of the return value of init_sysfs() with commit 10f0412 oprofile, x86: fix init_sysfs error handling discovered the following build error for !CONFIG_PM: .../linux/arch/x86/oprofile/nmi_int.c: In function ‘op_nmi_init’: .../linux/arch/x86/oprofile/nmi_int.c:784: error: expected expression before ‘do’ make[2]: *** [arch/x86/oprofile/nmi_int.o] Error 1 make[1]: *** [arch/x86/oprofile] Error 2 This patch fixes this. Reported-by: Ingo Molnar <mingo@elte.hu> Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-08-31oprofile, x86: fix init_sysfs error handlingRobert Richter1-3/+13
On failure init_sysfs() might not properly free resources. The error code of the function is not checked. And, when reinitializing the exit function might be called twice. This patch fixes all this. Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-08-05oprofile: add support for Intel processor model 30Josh Hunt1-0/+1
Newer Intel processors identifying themselves as model 30 are not recognized by oprofile. <cpuinfo snippet> model : 30 model name : Intel(R) Xeon(R) CPU X3470 @ 2.93GHz </cpuinfo snippet> Running oprofile on these machines gives the following: + opcontrol --init + opcontrol --list-events oprofile: available events for CPU type "Intel Architectural Perfmon" See Intel 64 and IA-32 Architectures Software Developer's Manual Volume 3B (Document 253669) Chapter 18 for architectural perfmon events This is a limited set of fallback events because oprofile doesn't know your CPU CPU_CLK_UNHALTED: (counter: all) Clock cycles when not halted (min count: 6000) INST_RETIRED: (counter: all) number of instructions retired (min count: 6000) LLC_MISSES: (counter: all) Last level cache demand requests from this core that missed the LLC (min count: 6000) Unit masks (default 0x41) ---------- 0x41: No unit mask LLC_REFS: (counter: all) Last level cache demand requests from this core (min count: 6000) Unit masks (default 0x4f) ---------- 0x4f: No unit mask BR_MISS_PRED_RETIRED: (counter: all) number of mispredicted branches retired (precise) (min count: 500) + opcontrol --shutdown Tested using oprofile 0.9.6. Signed-off-by: Josh Hunt <johunt@akamai.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-10Oprofile: Change CPUIDS from decimal to hex, and add some commentsJohn Villalovos1-2/+14
Back when the patch was submitted for "Add Xeon 7500 series support to oprofile", Robert Richter had asked for a followon patch that converted all the CPU ID values to hex. I have done that here for the "i386/core_i7" and "i386/atom" class processors in the ppro_init() function and also added some comments on where to find documentation on the Intel processors. Signed-off-by: John L. Villalovos <john.l.villalovos@intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-06oprofile/x86: make AMD IBS hotplug capableRobert Richter1-2/+2
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>
2010-05-06oprofile/x86: notify cpus only when daemon is runningRobert Richter1-13/+3
This patch moves the cpu notifier registration from nmi_init() to nmi_setup(). The corresponding unregistration function is now in nmi_shutdown(). Thus, the hotplug code is only active, if the oprofile daemon is running. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: reordering some functionsRobert Richter1-67/+67
Reordering some functions. Necessary for the next patch. No functional changes. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: stop disabled counters in nmi handlerRobert Richter1-2/+10
This patch adds checks to the nmi handler. Now samples are only generated and counters reenabled, if the counters are running. Otherwise the counters are stopped, if oprofile is using the nmi. In other cases it will ignore the nmi notification. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: protect cpu hotplug sectionsRobert Richter1-6/+46
This patch reworks oprofile cpu hotplug code as follows: Introduce ctr_running variable to check, if counters are running or not. The state must be known for taking a cpu on or offline and when switching counters during counter multiplexing. Protect on_each_cpu() sections with get_online_cpus()/put_online_cpu() functions. This is necessary if notifiers or states are modified. Within these sections the cpu mask may not change. Switch only between counters in nmi_cpu_switch(), if counters are running. Otherwise the switch may restart a counter though they are disabled. Add nmi_cpu_setup() and nmi_cpu_shutdown() to cpu hotplug code. The function must also be called to avoid uninitialzed counter usage. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: remove CONFIG_SMP macrosRobert Richter1-6/+1
CPU notifier register functions also exist if CONFIG_SMP is disabled. This change is part of hotplug code rework and also necessary for later patches. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: fix uninitialized counter usage during cpu hotplugRobert Richter1-2/+8
This fixes a NULL pointer dereference that is triggered when taking a cpu offline after oprofile was initialized, e.g.: $ opcontrol --init $ opcontrol --start-daemon $ opcontrol --shutdown $ opcontrol --deinit $ echo 0 > /sys/devices/system/cpu/cpu1/online See the crash dump below. Though the counter has been disabled the cpu notifier is still active and trying to use already freed counter data. This fix is for linux-stable. To proper fix this, the hotplug code must be rewritten. Thus I will leave a WARN_ON_ONCE() message with this patch. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff8132ad57>] op_amd_stop+0x2d/0x8e PGD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu1/online CPU 1 Modules linked in: Pid: 0, comm: swapper Not tainted 2.6.34-rc5-oprofile-x86_64-standard-00210-g8c00f06 #16 Anaheim/Anaheim RIP: 0010:[<ffffffff8132ad57>] [<ffffffff8132ad57>] op_amd_stop+0x2d/0x8e RSP: 0018:ffff880001843f28 EFLAGS: 00010006 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dead000000200200 RDX: ffff880001843f68 RSI: dead000000100100 RDI: 0000000000000000 RBP: ffff880001843f48 R08: 0000000000000000 R09: ffff880001843f08 R10: ffffffff8102c9a5 R11: ffff88000184ea80 R12: 0000000000000000 R13: ffff88000184f6c0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fec6a92e6f0(0000) GS:ffff880001840000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 000000000163b000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 0, threadinfo ffff88042fcd8000, task ffff88042fcd51d0) Stack: ffff880001843f48 0000000000000001 ffff88042e9f7d38 ffff880001843f68 <0> ffff880001843f58 ffffffff8132a602 ffff880001843f98 ffffffff810521b3 <0> ffff880001843f68 ffff880001843f68 ffff880001843f88 ffff88042fcd9fd8 Call Trace: <IRQ> [<ffffffff8132a602>] nmi_cpu_stop+0x21/0x23 [<ffffffff810521b3>] generic_smp_call_function_single_interrupt+0xdf/0x11b [<ffffffff8101804f>] smp_call_function_single_interrupt+0x22/0x31 [<ffffffff810029f3>] call_function_single_interrupt+0x13/0x20 <EOI> [<ffffffff8102c9a5>] ? wake_up_process+0x10/0x12 [<ffffffff81008701>] ? default_idle+0x22/0x37 [<ffffffff8100896d>] c1e_idle+0xdf/0xe6 [<ffffffff813f1170>] ? atomic_notifier_call_chain+0x13/0x15 [<ffffffff810012fb>] cpu_idle+0x4b/0x7e [<ffffffff813e8a4e>] start_secondary+0x1ae/0x1b2 Code: 89 e5 41 55 49 89 fd 41 54 45 31 e4 53 31 db 48 83 ec 08 89 df e8 be f8 ff ff 48 98 48 83 3c c5 10 67 7a 81 00 74 1f 49 8b 45 08 <42> 8b 0c 20 0f 32 48 c1 e2 20 25 ff ff bf ff 48 09 d0 48 89 c2 RIP [<ffffffff8132ad57>] op_amd_stop+0x2d/0x8e RSP <ffff880001843f28> CR2: 0000000000000000 ---[ end trace 679ac372d674b757 ]--- Kernel panic - not syncing: Fatal exception in interrupt Pid: 0, comm: swapper Tainted: G D 2.6.34-rc5-oprofile-x86_64-standard-00210-g8c00f06 #16 Call Trace: <IRQ> [<ffffffff813ebd6a>] panic+0x9e/0x10c [<ffffffff810474b0>] ? up+0x34/0x39 [<ffffffff81031ccc>] ? kmsg_dump+0x112/0x12c [<ffffffff813eeff1>] oops_end+0x81/0x8e [<ffffffff8101efee>] no_context+0x1f3/0x202 [<ffffffff8101f1b7>] __bad_area_nosemaphore+0x1ba/0x1e0 [<ffffffff81028d24>] ? enqueue_task_fair+0x16d/0x17a [<ffffffff810264dc>] ? activate_task+0x42/0x53 [<ffffffff8102c967>] ? try_to_wake_up+0x272/0x284 [<ffffffff8101f1eb>] bad_area_nosemaphore+0xe/0x10 [<ffffffff813f0f3f>] do_page_fault+0x1c8/0x37c [<ffffffff81028d24>] ? enqueue_task_fair+0x16d/0x17a [<ffffffff813ee55f>] page_fault+0x1f/0x30 [<ffffffff8102c9a5>] ? wake_up_process+0x10/0x12 [<ffffffff8132ad57>] ? op_amd_stop+0x2d/0x8e [<ffffffff8132ad46>] ? op_amd_stop+0x1c/0x8e [<ffffffff8132a602>] nmi_cpu_stop+0x21/0x23 [<ffffffff810521b3>] generic_smp_call_function_single_interrupt+0xdf/0x11b [<ffffffff8101804f>] smp_call_function_single_interrupt+0x22/0x31 [<ffffffff810029f3>] call_function_single_interrupt+0x13/0x20 <EOI> [<ffffffff8102c9a5>] ? wake_up_process+0x10/0x12 [<ffffffff81008701>] ? default_idle+0x22/0x37 [<ffffffff8100896d>] c1e_idle+0xdf/0xe6 [<ffffffff813f1170>] ? atomic_notifier_call_chain+0x13/0x15 [<ffffffff810012fb>] cpu_idle+0x4b/0x7e [<ffffffff813e8a4e>] start_secondary+0x1ae/0x1b2 ------------[ cut here ]------------ WARNING: at /local/rrichter/.source/linux/arch/x86/kernel/smp.c:118 native_smp_send_reschedule+0x27/0x53() Hardware name: Anaheim Modules linked in: Pid: 0, comm: swapper Tainted: G D 2.6.34-rc5-oprofile-x86_64-standard-00210-g8c00f06 #16 Call Trace: <IRQ> [<ffffffff81017f32>] ? native_smp_send_reschedule+0x27/0x53 [<ffffffff81030ee2>] warn_slowpath_common+0x77/0xa4 [<ffffffff81030f1e>] warn_slowpath_null+0xf/0x11 [<ffffffff81017f32>] native_smp_send_reschedule+0x27/0x53 [<ffffffff8102634b>] resched_task+0x60/0x62 [<ffffffff8102653a>] check_preempt_curr_idle+0x10/0x12 [<ffffffff8102c8ea>] try_to_wake_up+0x1f5/0x284 [<ffffffff8102c986>] default_wake_function+0xd/0xf [<ffffffff810a110d>] pollwake+0x57/0x5a [<ffffffff8102c979>] ? default_wake_function+0x0/0xf [<ffffffff81026be5>] __wake_up_common+0x46/0x75 [<ffffffff81026ed0>] __wake_up+0x38/0x50 [<ffffffff81031694>] printk_tick+0x39/0x3b [<ffffffff8103ac37>] update_process_times+0x3f/0x5c [<ffffffff8104dc63>] tick_periodic+0x5d/0x69 [<ffffffff8104dc90>] tick_handle_periodic+0x21/0x71 [<ffffffff81018fd0>] smp_apic_timer_interrupt+0x82/0x95 [<ffffffff81002853>] apic_timer_interrupt+0x13/0x20 [<ffffffff81030cb5>] ? panic_blink_one_second+0x0/0x7b [<ffffffff813ebdd6>] ? panic+0x10a/0x10c [<ffffffff810474b0>] ? up+0x34/0x39 [<ffffffff81031ccc>] ? kmsg_dump+0x112/0x12c [<ffffffff813eeff1>] ? oops_end+0x81/0x8e [<ffffffff8101efee>] ? no_context+0x1f3/0x202 [<ffffffff8101f1b7>] ? __bad_area_nosemaphore+0x1ba/0x1e0 [<ffffffff81028d24>] ? enqueue_task_fair+0x16d/0x17a [<ffffffff810264dc>] ? activate_task+0x42/0x53 [<ffffffff8102c967>] ? try_to_wake_up+0x272/0x284 [<ffffffff8101f1eb>] ? bad_area_nosemaphore+0xe/0x10 [<ffffffff813f0f3f>] ? do_page_fault+0x1c8/0x37c [<ffffffff81028d24>] ? enqueue_task_fair+0x16d/0x17a [<ffffffff813ee55f>] ? page_fault+0x1f/0x30 [<ffffffff8102c9a5>] ? wake_up_process+0x10/0x12 [<ffffffff8132ad57>] ? op_amd_stop+0x2d/0x8e [<ffffffff8132ad46>] ? op_amd_stop+0x1c/0x8e [<ffffffff8132a602>] ? nmi_cpu_stop+0x21/0x23 [<ffffffff810521b3>] ? generic_smp_call_function_single_interrupt+0xdf/0x11b [<ffffffff8101804f>] ? smp_call_function_single_interrupt+0x22/0x31 [<ffffffff810029f3>] ? call_function_single_interrupt+0x13/0x20 <EOI> [<ffffffff8102c9a5>] ? wake_up_process+0x10/0x12 [<ffffffff81008701>] ? default_idle+0x22/0x37 [<ffffffff8100896d>] ? c1e_idle+0xdf/0xe6 [<ffffffff813f1170>] ? atomic_notifier_call_chain+0x13/0x15 [<ffffffff810012fb>] ? cpu_idle+0x4b/0x7e [<ffffffff813e8a4e>] ? start_secondary+0x1ae/0x1b2 ---[ end trace 679ac372d674b758 ]--- Cc: Andi Kleen <andi@firstfloor.org> Cc: stable <stable@kernel.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-05-04oprofile/x86: return -EBUSY if counters are already reservedRobert Richter1-1/+4
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>
2010-05-04oprofile/x86: rework error handler in nmi_setup()Robert Richter1-14/+19
This patch improves the error handler in nmi_setup(). Most parts of the code are moved to allocate_msrs(). In case of an error allocate_msrs() also frees already allocated memory. nmi_setup() becomes easier and better extendable. Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-02-26oprofile/x86: use kzalloc() instead of kmalloc()Robert Richter1-3/+3
Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-02-26oprofile/x86: fix perfctr nmi reservation for mulitplexingRobert Richter1-5/+6
Multiple virtual counters share one physical counter. The reservation of virtual counters fails due to duplicate allocation of the same counter. The counters are already reserved. Thus, virtual counter reservation may removed at all. This also makes the code easier. Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-01-25oprofile/x86: add Xeon 7500 series supportAndi Kleen1-0/+1
Add Xeon 7500 series support to oprofile. Straight forward: it's the same as Core i7, so just detect the model number. No user space changes needed. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-01-25oprofile/x86: fix crash when profiling more than 28 eventsSuravee Suthikulpanit1-1/+1
With multiplexing enabled oprofile crashs when profiling more than 28 events. This patch fixes this. Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> 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 Richter1-0/+6
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 Richter1-0/+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 const qualifier from struct op_x86_model_specRobert Richter1-2/+2
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: Introduce op_x86_phys_to_virt()Robert Richter1-20/+23
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>
2009-07-20oprofile: Implement performance counter multiplexingJason Yeh1-5/+157
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 Richter1-6/+6
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>
2009-07-14Merge 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>
2009-06-12x86/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 Richter1-3/+4
Conflicts: arch/x86/oprofile/op_model_ppro.c 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 Richter1-20/+8
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 macros to calculate control registerRobert Richter1-0/+20
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/+1
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: simplify AMD cpu init codeRobert Richter1-8/+7
Signed-off-by: Robert Richter <robert.richter@amd.com>
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-26 06:25:24 +0300