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* Merge commit 'v2.6.37' into perf/coreIngo Molnar2011-01-05
|\ | | | | | | | | | | Merge reason: Add the final .37 tree. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * arch/x86/oprofile/op_model_amd.c: Perform initialisation on a single CPURobert Richter2011-01-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Disable preemption in init_ibs(). The function only checks the ibs capabilities and sets up pci devices (if necessary). It runs only on one cpu but operates with the local APIC and some MSRs, thus it is better to disable preemption. [ 7.034377] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/483 [ 7.034385] caller is setup_APIC_eilvt+0x155/0x180 [ 7.034389] Pid: 483, comm: modprobe Not tainted 2.6.37-rc1-20101110+ #1 [ 7.034392] Call Trace: [ 7.034400] [<ffffffff812a2b72>] debug_smp_processor_id+0xd2/0xf0 [ 7.034404] [<ffffffff8101e985>] setup_APIC_eilvt+0x155/0x180 [ ... ] Addresses https://bugzilla.kernel.org/show_bug.cgi?id=22812 Reported-by: <atswartz@gmail.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list@lists.sourceforge.net <oprofile-list@lists.sourceforge.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Dan Carpenter <error27@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> [2.6.37.x] LKML-Reference: <20110103111514.GM4739@erda.amd.com> [ small cleanups ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'core' of ↵Ingo Molnar2010-12-30
|\ \ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into perf/core
| * | oprofile, x86: Add support for 6 counters (AMD family 15h)Robert Richter2010-12-19
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for up to 6 hardware counters for AMD family 15h cpus. There is a new MSR range for hardware counters beginning at MSRC001_0200 Performance Event Select (PERF_CTL0). Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Add support for AMD family 15hRobert Richter2010-12-19
| |/ | | | | | | | | | | | | This patch adds support for AMD family 15h (Interlagos/Valencia/ Zambezi) cpus. Signed-off-by: Robert Richter <robert.richter@amd.com>
* | x86, nmi_watchdog: Remove ARCH_HAS_NMI_WATCHDOG and rely on ↵Don Zickus2010-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_HARDLOCKUP_DETECTOR The x86 arch has shifted its use of the nmi_watchdog from a local implementation to the global one provide by kernel/watchdog.c. This shift has caused a whole bunch of compile problems under different config options. I attempt to simplify things with the patch below. In order to simplify things, I had to come to terms with the meaning of two terms ARCH_HAS_NMI_WATCHDOG and CONFIG_HARDLOCKUP_DETECTOR. Basically they mean the same thing, the former on a local level and the latter on a global level. With the old x86 nmi watchdog gone, there is no need to rely on defining the ARCH_HAS_NMI_WATCHDOG variable because it doesn't make sense any more. x86 will now use the global implementation. The changes below do a few things. First it changes the few places that relied on ARCH_HAS_NMI_WATCHDOG to use CONFIG_X86_LOCAL_APIC (the former was an alias for the latter anyway, so nothing unusual here). Those pieces of code were relying more on local apic functionality the nmi watchdog functionality, so the change should make sense. Second, I removed the x86 implementation of touch_nmi_watchdog(). It isn't need now, instead x86 will rely on kernel/watchdog.c's implementation. Third, I removed the #define ARCH_HAS_NMI_WATCHDOG itself from x86. And tweaked the include/linux/nmi.h file to tell users to look for an externally defined touch_nmi_watchdog in the case of ARCH_HAS_NMI_WATCHDOG _or_ CONFIG_HARDLOCKUP_DETECTOR. This changes removes some of the ugliness in that file. Finally, I added a Kconfig dependency for CONFIG_HARDLOCKUP_DETECTOR that said you can't have ARCH_HAS_NMI_WATCHDOG _and_ CONFIG_HARDLOCKUP_DETECTOR. You can only have one nmi_watchdog. Tested with ARCH=i386: allnoconfig, defconfig, allyesconfig, (various broken configs) ARCH=x86_64: allnoconfig, defconfig, allyesconfig, (various broken configs) Hopefully, after this patch I won't get any more compile broken emails. :-) v3: changed a couple of 'linux/nmi.h' -> 'asm/nmi.h' to pick-up correct function prototypes when CONFIG_HARDLOCKUP_DETECTOR is not set. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: fweisbec@gmail.com LKML-Reference: <1293044403-14117-1-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'perf/core' of ↵Ingo Molnar2010-11-18
|\ \ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
| * | x86: Eliminate bp argument from the stack tracing routinesSoeren Sandmann Pedersen2010-11-18
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The various stack tracing routines take a 'bp' argument in which the caller is supposed to provide the base pointer to use, or 0 if doesn't have one. Since bp is garbage whenever CONFIG_FRAME_POINTER is not defined, this means all callers in principle should either always pass 0, or be conditional on CONFIG_FRAME_POINTER. However, there are only really three use cases for stack tracing: (a) Trace the current task, including IRQ stack if any (b) Trace the current task, but skip IRQ stack (c) Trace some other task In all cases, if CONFIG_FRAME_POINTER is not defined, bp should just be 0. If it _is_ defined, then - in case (a) bp should be gotten directly from the CPU's register, so the caller should pass NULL for regs, - in case (b) the caller should should pass the IRQ registers to dump_trace(), - in case (c) bp should be gotten from the top of the task's stack, so the caller should pass NULL for regs. Hence, the bp argument is not necessary because the combination of task and regs is sufficient to determine an appropriate value for bp. This patch introduces a new inline function stack_frame(task, regs) that computes the desired bp. This function is then called from the two versions of dump_stack(). Signed-off-by: Soren Sandmann <ssp@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org>, Cc: Frederic Weisbecker <fweisbec@gmail.com>, Cc: Arnaldo Carvalho de Melo <acme@redhat.com>, LKML-Reference: <m3oc9rop28.fsf@dhcp-100-3-82.bos.redhat.com>> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* / x86, nmi_watchdog: Remove all stub function calls from old nmi_watchdogDon Zickus2010-11-18
|/ | | | | | | | | | | | | | | | | | | Now that the bulk of the old nmi_watchdog is gone, remove all the stub variables and hooks associated with it. This touches lots of files mainly because of how the io_apic nmi_watchdog was implemented. Now that the io_apic nmi_watchdog is forever gone, remove all its fingers. Most of this code was not being exercised by virtue of nmi_watchdog != NMI_IO_APIC, so there shouldn't be anything to risky here. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: fweisbec@gmail.com Cc: gorcunov@openvz.org LKML-Reference: <1289578944-28564-3-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'x86' of ↵Ingo Molnar2010-10-25
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into perf/urgent
| * Merge branch 'oprofile/core' into oprofile/x86Robert Richter2010-10-25
| |\ | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/oprofile/op_model_amd.c Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Add support for IBS periodic op counter extensionRobert Richter2010-10-15
| | | | | | | | | | | | | | | | | | | | | | | | The count value for IBS op sampling has been extended by 7 bits. The feature is reflected in bit 6 (OpCntExt) of the IBS capability register (CPUID Fn8000_001B_EAX). Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Add support for IBS branch target address reportingRobert Richter2010-10-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for IBS branch target address reporting. A new MSR (MSRC001_103B IBS Branch Target Address) has been added that provides the logical address in canonical form for the branch target. The size of the IBS sample that is transferred to the userland has been increased. For backward compatibility, the userland daemon must explicit enable the feature by writing to the oprofilefs file ibs_op/branch_target After enabling branch target address reporting, the userland daemon must handle the extended size of the IBS sample. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Introduce struct ibs_stateRobert Richter2010-10-15
| | | | | | | | | | | | | | | | | | | | | This patch introduces struct ibs_state that will extended by additinal members in follow-on patches. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Remove duplicate check for IBS_CAPS_OPCNTRobert Richter2010-10-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | Since oprofile is setting up ibs_op/dispatched_ops in the fs only if the feature is available, its corresponding variable ibs_config.dispatched_ops is only set, if the feature is available. Thus the check is duplicate and can be removed. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Check IBS capability bits 1 and 2Robert Richter2010-10-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are IBS CPUID feature flags in CPUID Fn8000_001B to detect if the cpu supports IBS fetch sampling (FetchSam) and/or IBS execution sampling (OpSam). This patch adds checks if the both features are available. Spec: http://support.amd.com/us/Processor_TechDocs/31116.pdf Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Add support for AMD family 14hRobert Richter2010-10-15
| | | | | | | | | | | | | | | | | | This patch adds support for AMD family 14h (Ontario/Zacate) cpus. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | oprofile, x86: Add support for AMD family 12hRobert Richter2010-10-15
| | | | | | | | | | | | | | | | | | This patch adds support for AMD family 12h (Llano) cpus. Signed-off-by: Robert Richter <robert.richter@amd.com>
* | | x86/oprofile: Fix uninitialized variable use in debug printkIngo Molnar2010-10-25
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Stephen Rothwell reported this build warning: arch/x86/oprofile/op_model_amd.c: In function 'ibs_eilvt_valid': arch/x86/oprofile/op_model_amd.c:289: warning: 'offset' may be used uninitialized in this function And correctly observed that indeed the variable is used uninitialized in this function. The result of this bug can be a debug printk with a bogus value. Also fix a few more small details that made this function hard to read and which probably contributed to the bug being introduced to begin with: - Use more symmetric error conditions - Remove the !0 obfuscation - Add newlines to the printk output - Remove bogus linebreaks in printk strings and elsewhere Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Robert Richter <robert.richter@amd.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <20101025115736.41d51abe.sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'irq-core-for-linus' of ↵Linus Torvalds2010-10-21
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (96 commits) apic, x86: Use BIOS settings for IBS and MCE threshold interrupt LVT offsets apic, x86: Check if EILVT APIC registers are available (AMD only) x86: ioapic: Call free_irte only if interrupt remapping enabled arm: Use ARCH_IRQ_INIT_FLAGS genirq, ARM: Fix boot on ARM platforms genirq: Fix CONFIG_GENIRQ_NO_DEPRECATED=y build x86: Switch sparse_irq allocations to GFP_KERNEL genirq: Switch sparse_irq allocator to GFP_KERNEL genirq: Make sparse_lock a mutex x86: lguest: Use new irq allocator genirq: Remove the now unused sparse irq leftovers genirq: Sanitize dynamic irq handling genirq: Remove arch_init_chip_data() x86: xen: Sanitise sparse_irq handling x86: Use sane enumeration x86: uv: Clean up the direct access to irq_desc x86: Make io_apic.c local functions static genirq: Remove irq_2_iommu x86: Speed up the irq_remapped check in hot pathes intr_remap: Simplify the code further ... Fix up trivial conflicts in arch/x86/Kconfig
| * apic, x86: Use BIOS settings for IBS and MCE threshold interrupt LVT offsetsRobert Richter2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We want the BIOS to setup the EILVT APIC registers. The offsets were hardcoded and BIOS settings were overwritten by the OS. Now, the subsystems for MCE threshold and IBS determine the LVT offset from the registers the BIOS has setup. If the BIOS setup is buggy on a family 10h system, a workaround enables IBS. If the OS determines an invalid register setup, a "[Firmware Bug]: " error message is reported. We need this change also for upcomming cpu families. Signed-off-by: Robert Richter <robert.richter@amd.com> LKML-Reference: <1286360874-1471-3-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | oprofile, x86: Simplify init/exit functionsRobert Richter2010-10-01
| | | | | | | | | | | | | | | | | | | | | | 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>
* | oprofile, x86: Adding backtrace dump for 32bit process in compat modeJiri Olsa2010-10-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements the oprofile backtrace generation for 32 bit applications running in the 64bit environment (compat mode). With this change it's possible to get backtrace for 32bits applications under the 64bits environment using oprofile's callgraph options. opcontrol --setup -c ... opreport -l -cg ... Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
* | oprofile, x86: Using struct stack_frame for 64bit processes dumpJiri Olsa2010-10-01
|/ | | | | | | | | | | Removing unnecessary struct frame_head and replacing it with struct stack_frame. The struct stack_frame is already defined and used in other places in kernel, so there's no reason to define new structure. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
* oprofile: Add Support for Intel CPU Family 6 / Model 29Jiri Olsa2010-09-21
| | | | | | | | | | | | | | | | | | 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>
* oprofile: Add Support for Intel CPU Family 6 / Model 22 (Intel Celeron 540)Patrick Simmons2010-09-16
| | | | | | | | | | | | | | | | | | | 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>
* oprofile, x86: fix init_sysfs() function stubRobert Richter2010-09-01
| | | | | | | | | | | | | | | | | | | 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>
* oprofile, x86: fix init_sysfs error handlingRobert Richter2010-08-31
| | | | | | | | | 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>
* oprofile: add support for Intel processor model 30Josh Hunt2010-08-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* Merge remote branch 'tip/perf/urgent' into oprofile/urgentRobert Richter2010-06-04
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| * Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2010-05-18
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (311 commits) perf tools: Add mode to build without newt support perf symbols: symbol inconsistency message should be done only at verbose=1 perf tui: Add explicit -lslang option perf options: Type check all the remaining OPT_ variants perf options: Type check OPT_BOOLEAN and fix the offenders perf options: Check v type in OPT_U?INTEGER perf options: Introduce OPT_UINTEGER perf tui: Add workaround for slang < 2.1.4 perf record: Fix bug mismatch with -c option definition perf options: Introduce OPT_U64 perf tui: Add help window to show key associations perf tui: Make <- exit menus too perf newt: Add single key shortcuts for zoom into DSO and threads perf newt: Exit browser unconditionally when CTRL+C, q or Q is pressed perf newt: Fix the 'A'/'a' shortcut for annotate perf newt: Make <- exit the ui_browser x86, perf: P4 PMU - fix counters management logic perf newt: Make <- zoom out filters perf report: Report number of events, not samples perf hist: Clarify events_stats fields usage ... Fix up trivial conflicts in kernel/fork.c and tools/perf/builtin-record.c
| | * perf, x86: Undo some some *_counter* -> *_event* renamesRobert Richter2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The big rename: cdd6c48 perf: Do the big rename: Performance Counters -> Performance Events accidentally renamed some members of stucts that were named after registers in the spec. To avoid confusion this patch reverts some changes. The related specs are MSR descriptions in AMD's BKDGs and the ARCHITECTURAL PERFORMANCE MONITORING section in the Intel 64 and IA-32 Architectures Software Developer's Manuals. This patch does: $ sed -i -e 's:num_events:num_counters:g' \ arch/x86/include/asm/perf_event.h \ arch/x86/kernel/cpu/perf_event_amd.c \ arch/x86/kernel/cpu/perf_event.c \ arch/x86/kernel/cpu/perf_event_intel.c \ arch/x86/kernel/cpu/perf_event_p6.c \ arch/x86/kernel/cpu/perf_event_p4.c \ arch/x86/oprofile/op_model_ppro.c $ sed -i -e 's:event_bits:cntval_bits:g' -e 's:event_mask:cntval_mask:g' \ arch/x86/kernel/cpu/perf_event_amd.c \ arch/x86/kernel/cpu/perf_event.c \ arch/x86/kernel/cpu/perf_event_intel.c \ arch/x86/kernel/cpu/perf_event_p6.c \ arch/x86/kernel/cpu/perf_event_p4.c Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1269880612-25800-2-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Oprofile: Change CPUIDS from decimal to hex, and add some commentsJohn Villalovos2010-05-10
|/ / | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: make AMD IBS hotplug capableRobert Richter2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: notify cpus only when daemon is runningRobert Richter2010-05-06
| | | | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: reordering some functionsRobert Richter2010-05-04
| | | | | | | | | | | | | | | | 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>
* | oprofile/x86: stop disabled counters in nmi handlerRobert Richter2010-05-04
| | | | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: protect cpu hotplug sectionsRobert Richter2010-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: remove CONFIG_SMP macrosRobert Richter2010-05-04
| | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: fix uninitialized counter usage during cpu hotplugRobert Richter2010-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | oprofile/x86: remove duplicate IBS capability checkRobert Richter2010-05-04
| | | | | | | | | | | | The check is already done in ibs_exit(). Signed-off-by: Robert Richter <robert.richter@amd.com>
* | oprofile/x86: move IBS codeRobert Richter2010-05-04
| | | | | | | | | | | | | | Moving code to make future changes easier. This groups all IBS code together. Signed-off-by: Robert Richter <robert.richter@amd.com>
* | oprofile/x86: return -EBUSY if counters are already reservedRobert Richter2010-05-04
| | | | | | | | | | | | | | | | 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>
* | oprofile/x86: moving shutdown functionsRobert Richter2010-05-04
| | | | | | | | | | | | Moving some code in preparation of the next patch. Signed-off-by: Robert Richter <robert.richter@amd.com>
* | oprofile/x86: reserve counter msrs pairwiseRobert Richter2010-05-04
| | | | | | | | | | | | | | | | | | | | For AMD's and Intel's P6 generic performance counters have pairwise counter and control msrs. This patch changes the counter reservation in a way that both msrs must be registered. It joins some counter loops and also removes the unnecessary NUM_CONTROLS macro in the AMD implementation. Signed-off-by: Robert Richter <robert.richter@amd.com>
* | oprofile/x86: rework error handler in nmi_setup()Robert Richter2010-05-04
|/ | | | | | | | | 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>
* perf, x86: rename macro in ARCH_PERFMON_EVENTSEL_ENABLERobert Richter2010-03-01
| | | | | | | | | | | | | | | For consistency reasons this patch renames ARCH_PERFMON_EVENTSEL0_ENABLE to ARCH_PERFMON_EVENTSEL_ENABLE. The following is performed: $ sed -i -e s/ARCH_PERFMON_EVENTSEL0_ENABLE/ARCH_PERFMON_EVENTSEL_ENABLE/g \ arch/x86/include/asm/perf_event.h arch/x86/kernel/cpu/perf_event.c \ arch/x86/kernel/cpu/perf_event_p6.c \ arch/x86/kernel/cpu/perfctr-watchdog.c \ arch/x86/oprofile/op_model_amd.c arch/x86/oprofile/op_model_ppro.c Signed-off-by: Robert Richter <robert.richter@amd.com>
* perf, x86: add some IBS macros to perf_event.hRobert Richter2010-03-01
| | | | Signed-off-by: Robert Richter <robert.richter@amd.com>
* perf, x86: make IBS macros available in perf_event.hRobert Richter2010-03-01
| | | | | | | This patch moves code from oprofile to perf_event.h to make it also available for usage by perf. Signed-off-by: Robert Richter <robert.richter@amd.com>
* oprofile/x86: fix msr access to reserved countersRobert Richter2010-02-26
| | | | | | | | | During switching virtual counters there is access to perfctr msrs. If the counter is not available this fails due to an invalid address. This patch fixes this. Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 22:56:02 -0500