kernel.git/arch/x86/kernel/cpu/perf_event_intel.c, branch linux-4.3.y

perf/x86/intel: Fix Skylake FRONTEND MSR extrareg mask

2015-09-18T07:20:23Z

Stephane pointed out that the extrareg mask was one bit too short. The bubble width field was truncated by one bit. Fix that here. Also add some extra comments on the reserved bits inside the event select code. Reported-by: Stephane Eranian Signed-off-by: Andi Kleen Signed-off-by: Peter Zijlstra (Intel) Acked-by: Thomas Gleixner Cc: Linus Torvalds Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1441835640-21347-3-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar

perf/x86/intel/pebs: Add PEBS frontend profiling for Skylake

2015-09-18T07:20:22Z

Skylake has a new FRONTEND_LATENCY PEBS event to accurately profile frontend problems (like ITLB or decoding issues). The new event is configured through a separate MSR, which selects a range of sub events. Define the extra MSR as a extra reg and export support for it through sysfs. To avoid duplicating the existing tables use a new function to add new entries to existing tables. Signed-off-by: Andi Kleen Signed-off-by: Peter Zijlstra (Intel) Acked-by: Thomas Gleixner Cc: Linus Torvalds Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1435707205-6676-4-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar

perf/x86/intel: Make the CYCLE_ACTIVITY.* constraint on Broadwell more specific

2015-09-18T07:20:21Z

The counter constraint for CYCLE_ACTIVITY.* on Broadwell covered all CYCLE_ACTIVITY.* sub events, and forced them on counter 2. But actually only one sub event (umask 8) needs to be on counter 2, all others do not have any constraint. Only force that subevent. This fixes groups with multiple CYCLE_ACTIVITY.* events, for example: % perf stat -x, -e '{cpu/event=0xa3,umask=0x6,cmask=6/,\ cpu/event=0xa2,umask=0x8/,\ cpu/event=0xa3,umask=0x4,cmask=4/,cpu/event=0xb1,umask=0x1,cmask=1/}' true 122150,,cpu/event=0xa3,umask=0x6,cmask=6/,846486,100.00 16483,,cpu/event=0xa2,umask=0x8/,846486,100.00 252280,,cpu/event=0xa3,umask=0x4,cmask=4/,846486,100.00 233604,,cpu/event=0xb1,umask=0x1,cmask=1/,846486,100.00 % Without this patch the third result would be Signed-off-by: Andi Kleen Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1442267222-16464-1-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-17T17:37:46Z

Pull perf fixes from Ingo MOlnar: "Mostly tooling fixes, but also two x86 PMU driver fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf tests: Fix software clock events test setting maps perf tests: Fix task exit test setting maps perf evlist: Fix create_syswide_maps() not propagating maps perf evlist: Fix add() not propagating maps perf evlist: Factor out a function to propagate maps for a single evsel perf evlist: Make create_maps() use set_maps() perf evlist: Make set_maps() more resilient perf evsel: Add own_cpus member perf evlist: Fix missing thread_map__put in propagate_maps() perf evlist: Fix splice_list_tail() not setting evlist perf evlist: Add has_user_cpus member perf evlist: Remove redundant validation from propagate_maps() perf evlist: Simplify set_maps() logic perf evlist: Simplify propagate_maps() logic perf top: Fix segfault pressing -> with no hist entries perf header: Fixup reading of HEADER_NRCPUS feature perf/x86/intel: Fix constraint access perf/x86/intel/bts: Set event->hw.itrace_started in pmu::start to match the new logic perf tools: Fix use of wrong event when processing exit events perf tools: Fix parse_events_add_pmu caller

perf/x86/intel: Fix constraint access

2015-09-13T07:37:10Z

Sasha reported that we can get here with .idx==-1, and cpuc->event_constraints unallocated. Suggested-by: Stephane Eranian Reported-by: Sasha Levin Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Fixes: b371b5943178 ("perf/x86: Fix event/group validation") Signed-off-by: Ingo Molnar

watchdog: rename watchdog_suspend() and watchdog_resume()

2015-09-04T23:54:41Z

Rename watchdog_suspend() to lockup_detector_suspend() and watchdog_resume() to lockup_detector_resume() to avoid confusion with the watchdog subsystem and to be consistent with the existing name lockup_detector_init(). Also provide comment blocks to explain the watchdog_running and watchdog_suspended variables and their relationship. Signed-off-by: Ulrich Obergfell Reviewed-by: Aaron Tomlin Cc: Guenter Roeck Cc: Don Zickus Cc: Ulrich Obergfell Cc: Jiri Olsa Cc: Michal Hocko Cc: Stephane Eranian Cc: Chris Metcalf Cc: Frederic Weisbecker Cc: Peter Zijlstra Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

watchdog: use suspend/resume interface in fixup_ht_bug()

2015-09-04T23:54:41Z

Remove watchdog_nmi_disable_all() and watchdog_nmi_enable_all() since these functions are no longer needed. If a subsystem has a need to deactivate the watchdog temporarily, it should utilize the watchdog_suspend() and watchdog_resume() functions. [akpm@linux-foundation.org: fix build with CONFIG_LOCKUP_DETECTOR=m] Signed-off-by: Ulrich Obergfell Reviewed-by: Aaron Tomlin Cc: Guenter Roeck Cc: Don Zickus Cc: Ulrich Obergfell Cc: Jiri Olsa Cc: Michal Hocko Cc: Stephane Eranian Cc: Chris Metcalf Cc: Frederic Weisbecker Cc: Peter Zijlstra Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kernel/watchdog: move NMI function header declarations from watchdog.h to nmi.h

2015-09-04T23:54:41Z

The kernel's NMI watchdog has nothing to do with the watchdog subsystem. Its header declarations should be in linux/nmi.h, not linux/watchdog.h. The code provided two sets of dummy functions if HARDLOCKUP_DETECTOR is not configured, one in the include file and one in kernel/watchdog.c. Remove the dummy functions from kernel/watchdog.c and use those from the include file. Signed-off-by: Guenter Roeck Cc: Stephane Eranian Cc: Peter Zijlstra (Intel) Cc: Ingo Molnar Cc: Don Zickus Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'perf/urgent' into perf/core, to pick up fixes before applying new changes

2015-08-12T09:39:19Z

Signed-off-by: Ingo Molnar

perf/x86/intel: Fix memory leak on hot-plug allocation fail

2015-08-12T09:37:22Z

We fail to free the shared_regs allocation if the constraint_list allocation fails. Cure this and be more consistent in NULL-ing the pointers after free. Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Signed-off-by: Ingo Molnar