1. 07 Mar, 2018 3 commits
  2. 06 Mar, 2018 5 commits
    • Adrian Hunter's avatar
      perf tools: Fix trigger class trigger_on() · de19e5c3
      Adrian Hunter authored
      trigger_on() means that the trigger is available but not ready, however
      trigger_on() was making it ready. That can segfault if the signal comes
      before trigger_ready(). e.g. (USR2 signal delivery not shown)
      
        $ perf record -e intel_pt//u -S sleep 1
        perf: Segmentation fault
        Obtained 16 stack frames.
        /home/ahunter/bin/perf(sighandler_dump_stack+0x40) [0x4ec550]
        /lib/x86_64-linux-gnu/libc.so.6(+0x36caf) [0x7fa76411acaf]
        /home/ahunter/bin/perf(perf_evsel__disable+0x26) [0x4b9dd6]
        /home/ahunter/bin/perf() [0x43a45b]
        /lib/x86_64-linux-gnu/libc.so.6(+0x36caf) [0x7fa76411acaf]
        /lib/x86_64-linux-gnu/libc.so.6(__xstat64+0x15) [0x7fa7641d2cc5]
        /home/ahunter/bin/perf() [0x4ec6c9]
        /home/ahunter/bin/perf() [0x4ec73b]
        /home/ahunter/bin/perf() [0x4ec73b]
        /home/ahunter/bin/perf() [0x4ec73b]
        /home/ahunter/bin/perf() [0x4eca15]
        /home/ahunter/bin/perf(machine__create_kernel_maps+0x257) [0x4f0b77]
        /home/ahunter/bin/perf(perf_session__new+0xc0) [0x4f86f0]
        /home/ahunter/bin/perf(cmd_record+0x722) [0x43c132]
        /home/ahunter/bin/perf() [0x4a11ae]
        /home/ahunter/bin/perf(main+0x5d4) [0x427fb4]
      
      Note, for testing purposes, this is hard to hit unless you add some sleep()
      in builtin-record.c before record__open().
      Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
      Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Cc: stable@vger.kernel.org
      Fixes: 3dcc4436 ("perf tools: Introduce trigger class")
      Link: http://lkml.kernel.org/r/1519807144-30694-1-git-send-email-adrian.hunter@intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      de19e5c3
    • Adrian Hunter's avatar
      perf auxtrace: Prevent decoding when --no-itrace · 2e2967f4
      Adrian Hunter authored
      Prevent auxtrace_queues__process_index() from queuing AUX area data for
      decoding when the --no-itrace option has been used.
      Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1520327598-1317-3-git-send-email-adrian.hunter@intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      2e2967f4
    • Ilya Pronin's avatar
      perf stat: Fix CVS output format for non-supported counters · 40c21898
      Ilya Pronin authored
      When printing stats in CSV mode, 'perf stat' appends extra separators
      when a counter is not supported:
      
      <not supported>,,L1-dcache-store-misses,mesos/bd442f34-2b4a-47df-b966-9b281f9f56fc,0,100.00,,,,
      
      Which causes a failure when parsing fields. The numbers of separators
      should be the same for each line, no matter if the counter is or not
      supported.
      Signed-off-by: default avatarIlya Pronin <ipronin@twitter.com>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Link: http://lkml.kernel.org/r/20180306064353.31930-1-xiyou.wangcong@gmail.com
      Fixes: 92a61f64 ("perf stat: Implement CSV metrics output")
      Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      40c21898
    • Ingo Molnar's avatar
      Merge tag 'perf-core-for-mingo-4.17-20180305' of... · 55b4ce61
      Ingo Molnar authored
      Merge tag 'perf-core-for-mingo-4.17-20180305' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
      
      Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
      
      - Be more robust when drawing arrows in the annotation TUI, avoiding a
        segfault when jump instructions have as a target addresses in functions
        other that the one currently being annotated. The full fix will come in
        the following days, when jumping to other functions will work as call
        instructions (Arnaldo Carvalho de Melo)
      
      - Allow asking for the maximum allowed sample rate in 'top' and
        'record', i.e. 'perf record -F max' will read the
        kernel.perf_event_max_sample_rate sysctl and use it (Arnaldo Carvalho de Melo)
      
      - When the user specifies a freq above kernel.perf_event_max_sample_rate,
        Throttle it down to that max freq, and warn the user about it, add as
        well --strict-freq so that the previous behaviour of not starting the
        session when the desired freq can't be used can be selected (Arnaldo Carvalho de Melo)
      
      - Find 'call' instruction target symbol at parsing time, used so far in
        the TUI, part of the infrastructure changes that will end up allowing
        for jumps to navigate to other functions, just like 'call'
        instructions. (Arnaldo Carvalho de Melo)
      
      - Use xyarray dimensions to iterate fds in 'perf stat' (Andi Kleen)
      
      - Ignore threads for which the current user hasn't permissions when
        enabling system-wide --per-thread (Jin Yao)
      
      - Fix some backtrace perf test cases to use 'perf record' + 'perf script'
        instead, till 'perf trace' starts using ordered_events or equivalent
        to avoid symbol resolving artifacts due to reordering of
        PERF_RECORD_MMAP events (Jiri Olsa)
      
      - Fix crash in 'perf record' pipe mode, it needs to allocate the ID
        array even for a single event, unlike non-pipe mode (Jiri Olsa)
      
      - Make annoying fallback message on older kernels with newer 'perf top'
        binaries trying to use overwrite mode and that not being present
        in the older kernels (Kan Liang)
      
      - Switch last users of old APIs to the newer perf_mmap__read_event()
        one, then discard those old mmap read forward APIs (Kan Liang)
      
      - Fix the usage on the 'perf kallsyms' man page (Sangwon Hong)
      
      - Simplify cgroup arguments when tracking multiple events (weiping zhang)
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      55b4ce61
    • Ingo Molnar's avatar
      8af31363
  3. 05 Mar, 2018 29 commits
  4. 04 Mar, 2018 3 commits
    • Linus Torvalds's avatar
      Linux 4.16-rc4 · 661e50bc
      Linus Torvalds authored
      661e50bc
    • Linus Torvalds's avatar
      Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e64b9562
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A small set of fixes for x86:
      
         - Add missing instruction suffixes to assembly code so it can be
           compiled by newer GAS versions without warnings.
      
         - Switch refcount WARN exceptions to UD2 as we did in general
      
         - Make the reboot on Intel Edison platforms work
      
         - A small documentation update so text and sample command match"
      
      * 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        Documentation, x86, resctrl: Make text and sample command match
        x86/platform/intel-mid: Handle Intel Edison reboot correctly
        x86/asm: Add instruction suffixes to bitops
        x86/entry/64: Add instruction suffix
        x86/refcounts: Switch to UD2 for exceptions
      e64b9562
    • Linus Torvalds's avatar
      Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7225a442
      Linus Torvalds authored
      Pull x86/pti fixes from Thomas Gleixner:
       "Three fixes related to melted spectrum:
      
         - Sync the cpu_entry_area page table to initial_page_table on 32 bit.
      
           Otherwise suspend/resume fails because resume uses
           initial_page_table and triggers a triple fault when accessing the
           cpu entry area.
      
         - Zero the SPEC_CTL MRS on XEN before suspend to address a
           shortcoming in the hypervisor.
      
         - Fix another switch table detection issue in objtool"
      
      * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/cpu_entry_area: Sync cpu_entry_area to initial_page_table
        objtool: Fix another switch table detection issue
        x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend
      7225a442