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* Merge branch 'akpm' (patches from Andrew)Linus Torvalds2017-01-111-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge fixes from Andrew Morton: "27 fixes. There are three patches that aren't actually fixes. They're simple function renamings which are nice-to-have in mainline as ongoing net development depends on them." * akpm: (27 commits) timerfd: export defines to userspace mm/hugetlb.c: fix reservation race when freeing surplus pages mm/slab.c: fix SLAB freelist randomization duplicate entries zram: support BDI_CAP_STABLE_WRITES zram: revalidate disk under init_lock mm: support anonymous stable page mm: add documentation for page fragment APIs mm: rename __page_frag functions to __page_frag_cache, drop order from drain mm: rename __alloc_page_frag to page_frag_alloc and __free_page_frag to page_frag_free mm, memcg: fix the active list aging for lowmem requests when memcg is enabled mm: don't dereference struct page fields of invalid pages mailmap: add codeaurora.org names for nameless email commits signal: protect SIGNAL_UNKILLABLE from unintentional clearing. mm: pmd dirty emulation in page fault handler ipc/sem.c: fix incorrect sem_lock pairing lib/Kconfig.debug: fix frv build failure mm: get rid of __GFP_OTHER_NODE mm: fix remote numa hits statistics mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done} ocfs2: fix crash caused by stale lvb with fsdlm plugin ...
| * mm: get rid of __GFP_OTHER_NODEMichal Hocko2017-01-111-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flag was introduced by commit 78afd5612deb ("mm: add __GFP_OTHER_NODE flag") to allow proper accounting of remote node allocations done by kernel daemons on behalf of a process - e.g. khugepaged. After "mm: fix remote numa hits statistics" we do not need and actually use the flag so we can safely remove it because all allocations which are satisfied from their "home" node are accounted properly. [mhocko@suse.com: fix build] Link: http://lkml.kernel.org/r/20170106122225.GK5556@dhcp22.suse.cz Link: http://lkml.kernel.org/r/20170102153057.9451-3-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Taku Izumi <izumi.taku@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | selftests: x86/pkeys: fix spelling mistake: "itertation" -> "iteration"Colin King2017-01-051-1/+1
| | | | | | | | | | | | | | Fix spelling mistake in print test pass message. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
* | selftests: do not require bash to run netsocktests testcaseRolf Eike Beer2017-01-051-1/+1
| | | | | | | | | | | | | | | | | | | | Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Cc: stable@vger.kernel.org Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
* | selftests: do not require bash to run bpf testsRolf Eike Beer2017-01-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Cc: stable@vger.kernel.org Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
* | selftests: do not require bash for the generated testRolf Eike Beer2017-01-051-1/+1
|/ | | | | | | | | | Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Cc: stable@vger.kernel.org Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
* Merge branch 'turbostat' of ↵Linus Torvalds2016-12-253-371/+673
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux Pull turbostat updates from Len Brown. * 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: tools/power turbostat: remove obsolete -M, -m, -C, -c options tools/power turbostat: Make extensible via the --add parameter tools/power turbostat: Denverton uses a 25 MHz crystal, not 19.2 MHz tools/power turbostat: line up headers when -M is used tools/power turbostat: fix SKX PKG_CSTATE_LIMIT decoding tools/power turbostat: Support Knights Mill (KNM) tools/power turbostat: Display HWP OOB status tools/power turbostat: fix Denverton BCLK tools/power turbostat: use intel-family.h model strings tools/power/turbostat: Add Denverton RAPL support tools/power/turbostat: Add Denverton support tools/power/turbostat: split core MSR support into status + limit tools/power turbostat: fix error case overflow read of slm_freq_table[] tools/power turbostat: Allocate correct amount of fd and irq entries tools/power turbostat: switch to tab delimited output tools/power turbostat: Gracefully handle ACPI S3 tools/power turbostat: tidy up output on Joule counter overflow
| * tools/power turbostat: remove obsolete -M, -m, -C, -c optionsLen Brown2016-12-242-110/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new --add option has replaced the -M, -m, -C, -c options Eg. -M 0x10 is now --add msr0x10,raw -m 0x10 is now --add msr0x10,raw,u32 -C 0x10 is now --add msr0x10,delta -c 0x10 is now --add msr0x10,delta,u32 The --add option can be repeated to add any number of counters, while the previous options were limited to adding one of each type. In addition, the --add option can accept a column label, and can also display a counter as a percentage of elapsed cycles. Eg. --add msr0x3fe,core,percent,MY_CC3 Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: Make extensible via the --add parameterLen Brown2016-12-242-9/+409
| | | | | | | | | | | | | | | | | | Create the "--add" parameter. This can be used to teach an existing turbostat binary about any number of any type of counter. turbostat(8) details the syntax for --add. Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: Denverton uses a 25 MHz crystal, not 19.2 MHzLen Brown2016-12-021-1/+1
| | | | | | | | | | | | | | | | | | This changes only the TSC frequency decoding line seen with --debug old: TSC: 1382 MHz (19200000 Hz * 216 / 3 / 1000000) new: TSC: 1800 MHz (25000000 Hz * 216 / 3 / 1000000) Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: line up headers when -M is usedLen Brown2016-12-021-1/+1
| | | | | | | | | | | | | | | | The -M option adds an 18-column item, and the header needs to be wide enough to keep the header aligned with the columns. Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: fix SKX PKG_CSTATE_LIMIT decodingLen Brown2016-12-021-1/+4
| | | | | | | | | | | | | | | | | | SKX has fewer package C-states than previous generations, and so the decoding of PKG_CSTATE_LIMIT has changed. This changes the line ending with pkg-cstate-limit=XXX: pcYYY Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: Support Knights Mill (KNM)Len Brown2016-12-011-0/+7
| | | | | | | | | | Original-author: Piotr Luc <piotr.luc@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: Display HWP OOB statusSrinivas Pandruvada2016-12-011-2/+3
| | | | | | | | | | | | | | Display if the HWP is enabled in OOB (Out of band) mode. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: fix Denverton BCLKXiaolong Wang2016-12-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | Add Denverton to the group of SandyBridge and later processors, to let the bclk be recognized as 100MHz rather than 133MHz, then avoid the wrong value of the frequencies based on it, including Bzy_MHz, max efficiency freuency, base frequency, and turbo mode frequencies. Signed-off-by: Xiaolong Wang <xiaolong.wang@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: use intel-family.h model stringsLen Brown2016-12-012-124/+126
| | | | | | | | | | | | | | All except for model 1F, a Nehalem, which is currently incorrectly indentified as a Westmere in that new header. Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power/turbostat: Add Denverton RAPL supportJacob Pan2016-12-011-0/+3
| | | | | | | | | | | | | | The Denverton CPU RAPL supports package, core, and DRAM domains. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power/turbostat: Add Denverton supportJacob Pan2016-12-011-0/+2
| | | | | | | | | | | | | | | | | | Denverton is an Atom based micro server which shares the same Goldmont architecture as Broxton. The available C-states on Denverton is a subset of Broxton with only C1, C1e, and C6. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power/turbostat: split core MSR support into status + limitJacob Pan2016-12-011-9/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Some CPUs may not have PP0/Core domain power limit MSRs. We should still allow its domain energy status to be used. This patch splits PP0/Core RAPL into two separate flags for power limit and energy status such that energy status can continue to be reported without power limit. Without this patch, turbostat will not be able to use the remaining RAPL features if some PL MSRs are not present. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: fix error case overflow read of slm_freq_table[]Colin Ian King2016-12-011-1/+1
| | | | | | | | | | | | | | | | | | When i >= SLM_BCLK_FREQS, the frequency read from the slm_freq_table is off the end of the array because msr is set to 3 rather than the actual array index i. Set i to 3 rather than msr to fix this. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: Allocate correct amount of fd and irq entriesMika Westerberg2016-12-011-4/+4
| | | | | | | | | | | | | | | | | | | | | | The tool uses topo.max_cpu_num to determine number of entries needed for fd_percpu[] and irqs_per_cpu[]. For example on a system with 4 CPUs topo.max_cpu_num is 3 so we get too small array for holding per-CPU items. Fix this to use right number of entries, which is topo.max_cpu_num + 1. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: switch to tab delimited outputLen Brown2016-12-011-85/+85
| | | | | | | | | | | | | | | | | | | | Switch to tab-delimited output from fixed-width columns to make it simpler to import into spreadsheets. As the fixed width columnns were 8-spaces wide, the output on the screen should not change. Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: Gracefully handle ACPI S3Len Brown2016-12-011-42/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | turbostat gives valid results across suspend to idle, aka freeze, whether invoked in interval mode, or in command mode. Indeed, this can be used to measure suspend to idle: turbostat echo freeze > /sys/power/state But this does not work across suspend to ACPI S3, because the processor counters, including the TSC, are reset on resume. Further, when turbostat detects a problem, it does't forgive the hardware, and interval mode will print *'s from there on out. Instead, upon detecting counters going backwards, simply reset and start over. Interval mode across ACPI S3: (observe TSC going backwards) root@sharkbay:/home/lenb/turbostat-src# ./turbostat -M 0x10 CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x010 - 1 0.06 858 2294 0x0000000000000000 0 0 0.06 847 2294 0x0000002a254b98ac 1 1 0.06 878 2294 0x0000002a254efa3a 2 1 0.07 843 2294 0x0000002a2551df65 3 0 0.05 863 2294 0x0000002a2553fea2 turbostat: re-initialized with num_cpus 4 CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x010 - 2 0.20 849 2294 0x0000000000000000 0 2 0.26 856 2294 0x0000000449abb60d 1 2 0.20 844 2294 0x0000000449b087ec 2 2 0.21 850 2294 0x0000000449b35d5d 3 1 0.12 839 2294 0x0000000449b5fd5a ^C Command mode across ACPI S3: root@sharkbay:/home/lenb/turbostat-src# ./turbostat -M 0x10 sleep 10 ./turbostat: Counter reset detected 14.196299 sec Signed-off-by: Len Brown <len.brown@intel.com>
| * tools/power turbostat: tidy up output on Joule counter overflowLen Brown2016-12-011-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RAPL Joules counter is limited in capacity. Turbostat estimates how soon it can roll-over based on the max TDP of the processor -- which tells us the maximum increment rate. eg. RAPL: 2759 sec. Joule Counter Range, at 95 Watts So if a sample duration is longer than 2759 seconds on this system, '**' replace the decimal place in the display to indicate that the results may be suspect. But the display had an extra ' ' in this case, throwing off the columns. Also, the -J "Joules" option appended an extra "time" column to the display. While this may be useful, it printed the interval time, which may not be the accurate time per processor. Remove this column, which appeared only when using '-J', as we plan to add accurate per-cpu interval times in a future commit. Signed-off-by: Len Brown <len.brown@intel.com>
* | Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2016-12-2427-405/+865
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "On the kernel side there's two x86 PMU driver fixes and a uprobes fix, plus on the tooling side there's a number of fixes and some late updates" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits) perf sched timehist: Fix invalid period calculation perf sched timehist: Remove hardcoded 'comm_width' check at print_summary perf sched timehist: Enlarge default 'comm_width' perf sched timehist: Honour 'comm_width' when aligning the headers perf/x86: Fix overlap counter scheduling bug perf/x86/pebs: Fix handling of PEBS buffer overflows samples/bpf: Move open_raw_sock to separate header samples/bpf: Remove perf_event_open() declaration samples/bpf: Be consistent with bpf_load_program bpf_insn parameter tools lib bpf: Add bpf_prog_{attach,detach} samples/bpf: Switch over to libbpf perf diff: Do not overwrite valid build id perf annotate: Don't throw error for zero length symbols perf bench futex: Fix lock-pi help string perf trace: Check if MAP_32BIT is defined (again) samples/bpf: Make perf_event_read() static uprobes: Fix uprobes on MIPS, allow for a cache flush after ixol breakpoint creation samples/bpf: Make samples more libbpf-centric tools lib bpf: Add flags to bpf_create_map() tools lib bpf: use __u32 from linux/types.h ...
| * | perf sched timehist: Fix invalid period calculationNamhyung Kim2016-12-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When --time option is given with a value outside recorded time, the last sample time (tprev) was set to that value and run time calculation might be incorrect. This is a problem of the first samples for each cpus since it would skip the runtime update when tprev is 0. But with --time option it had non-zero (which is invalid) value so the calculation is also incorrect. For example, let's see the followging: $ perf sched timehist time cpu task name wait time sch delay run time [tid/pid] (msec) (msec) (msec) --------------- ------ ------------------------------ --------- --------- --------- 3195.968367 [0003] <idle> 0.000 0.000 0.000 3195.968386 [0002] Timer[4306/4277] 0.000 0.000 0.018 3195.968397 [0002] Web Content[4277] 0.000 0.000 0.000 3195.968595 [0001] JS Helper[4302/4277] 0.000 0.000 0.000 3195.969217 [0000] <idle> 0.000 0.000 0.621 3195.969251 [0001] kworker/1:1H[291] 0.000 0.000 0.033 The sample starts at 3195.968367 but when I gave a time interval from 3194 to 3196 (in sec) it will calculate the whole 2 second as runtime. In below, 2 cpus accounted it as runtime, other 2 cpus accounted it as idle time. Before: $ perf sched timehist --time 3194,3196 -s | tail Idle stats: CPU 0 idle for 1995.991 msec CPU 1 idle for 20.793 msec CPU 2 idle for 30.191 msec CPU 3 idle for 1999.852 msec Total number of unique tasks: 23 Total number of context switches: 128 Total run time (msec): 3724.940 After: $ perf sched timehist --time 3194,3196 -s | tail Idle stats: CPU 0 idle for 10.811 msec CPU 1 idle for 20.793 msec CPU 2 idle for 30.191 msec CPU 3 idle for 18.337 msec Total number of unique tasks: 23 Total number of context switches: 128 Total run time (msec): 18.139 Committer notes: Further testing: Before: Idle stats: CPU 0 idle for 229.785 msec CPU 1 idle for 937.944 msec CPU 2 idle for 188.931 msec CPU 3 idle for 986.185 msec After: # perf sched timehist --time 40602,40603 -s | tail Idle stats: CPU 0 idle for 229.785 msec CPU 1 idle for 175.407 msec CPU 2 idle for 188.931 msec CPU 3 idle for 223.657 msec Total number of unique tasks: 68 Total number of context switches: 814 Total run time (msec): 97.688 # for cpu in `seq 0 3` ; do echo -n "CPU $cpu idle for " ; perf sched timehist --time 40602,40603 | grep "\[000${cpu}\].*\<idle\>" | tr -s ' ' | cut -d' ' -f7 | awk '{entries++ ; s+=$1} END {print s " msec (entries: " entries ")"}' ; done CPU 0 idle for 229.721 msec (entries: 123) CPU 1 idle for 175.381 msec (entries: 65) CPU 2 idle for 188.903 msec (entries: 56) CPU 3 idle for 223.61 msec (entries: 102) Difference due to the idle stats being accounted at nanoseconds precision while the <idle> entries in 'perf sched timehist' are trucated at msec.usec. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Fixes: 853b74071110 ("perf sched timehist: Add option to specify time window of interest") Link: http://lkml.kernel.org/r/20161222060350.17655-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Remove hardcoded 'comm_width' check at print_summaryNamhyung Kim2016-12-221-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the default 'comm_width' value is 30, no need to check that at print_summary, Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20161222060350.17655-1-namhyung@kernel.org [ Split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Enlarge default 'comm_width'Namhyung Kim2016-12-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current default value is 20 but it's easily changed to a bigger value as task has a long name and different tid and pid. And it makes the output not aligned. So change it to have a large value as summary shows. Committer notes: Before: # perf sched record ^C # perf sched timehist <SNIP> 40602.770537 [0001] rcuos/2[29] 7.970 0.002 0.020 40602.771512 [0003] <idle> 0.003 0.000 0.986 40602.771586 [0001] <idle> 0.020 0.000 1.049 40602.771606 [0001] qemu-system-x86[3593/3510] 0.000 0.002 0.020 40602.771629 [0003] qemu-system-x86[3510] 0.000 0.003 0.116 40602.771776 [0000] <idle> 0.001 0.000 1.892 <SNIP> After: # perf sched timehist <SNIP> 40602.770537 [0001] rcuos/2[29] 7.970 0.002 0.020 40602.771512 [0003] <idle> 0.003 0.000 0.986 40602.771586 [0001] <idle> 0.020 0.000 1.049 40602.771606 [0001] qemu-system-x86[3593/3510] 0.000 0.002 0.020 40602.771629 [0003] qemu-system-x86[3510] 0.000 0.003 0.116 <SNIP> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20161222060350.17655-1-namhyung@kernel.org [ Split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Honour 'comm_width' when aligning the headersNamhyung Kim2016-12-221-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current default value is 20, but that may change in the future, so make places where we have 20 hardcoded use 'comm_width'. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20161222060350.17655-1-namhyung@kernel.org [ Split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | tools lib bpf: Add bpf_prog_{attach,detach}Joe Stringer2016-12-202-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit d8c5b17f2bc0 ("samples: bpf: add userspace example for attaching eBPF programs to cgroups") added these functions to samples/libbpf, but during this merge all of the samples libbpf functionality is shifting to tools/lib/bpf. Shift these functions there. Committer notes: Use bzero + attr.FIELD = value instead of 'attr = { .FIELD = value, just like the other wrapper calls to sys_bpf with bpf_attr to make this build in older toolchais, such as the ones in CentOS 5 and 6. Signed-off-by: Joe Stringer <joe@ovn.org> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-au2zvtsh55vqeo3v3uw7jr4c@git.kernel.org Link: https://github.com/joestringer/linux/commit/353e6f298c3d0a92fa8bfa61ff898c5050261a12.patch Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf diff: Do not overwrite valid build idKan Liang2016-12-201-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes a perf diff regression issue which was introduced by commit 5baecbcd9c9a ("perf symbols: we can now read separate debug-info files based on a build ID") The binary name could be same when perf diff different binaries. Build id is used to distinguish between them. However, the previous patch assumes the same binary name has same build id. So it overwrites the build id according to the binary name, regardless of whether the build id is set or not. Check the has_build_id in dso__load. If the build id is already set, use it. Before the fix: $ perf diff 1.perf.data 2.perf.data # Event 'cycles' # # Baseline Delta Shared Object Symbol # ........ ....... ................ ............................. # 99.83% -99.80% tchain_edit [.] f2 0.12% +99.81% tchain_edit [.] f3 0.02% -0.01% [ixgbe] [k] ixgbe_read_reg After the fix: $ perf diff 1.perf.data 2.perf.data # Event 'cycles' # # Baseline Delta Shared Object Symbol # ........ ....... ................ ............................. # 99.83% +0.10% tchain_edit [.] f3 0.12% -0.08% tchain_edit [.] f2 Signed-off-by: Kan Liang <kan.liang@intel.com> Cc: Andi Kleen <andi@firstfloor.org> CC: Dima Kogan <dima@secretsauce.net> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Fixes: 5baecbcd9c9a ("perf symbols: we can now read separate debug-info files based on a build ID") Link: http://lkml.kernel.org/r/1481642984-13593-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf annotate: Don't throw error for zero length symbolsRavi Bangoria2016-12-201-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'perf report --tui' exits with error when it finds a sample of zero length symbol (i.e. addr == sym->start == sym->end). Actually these are valid samples. Don't exit TUI and show report with such symbols. Reported-and-Tested-by: Anton Blanchard <anton@samba.org> Link: https://lkml.org/lkml/2016/10/8/189 Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chris Riyder <chris.ryder@arm.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: stable@kernel.org # v4.9+ Link: http://lkml.kernel.org/r/1479804050-5028-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf bench futex: Fix lock-pi help stringDavidlohr Bueso2016-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Obvious copy/paste typo from the requeue program. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Davidlohr Bueso <dbueso@suse.de> Link: http://lkml.kernel.org/r/1481830584-30909-1-git-send-email-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf trace: Check if MAP_32BIT is defined (again)Jiri Olsa2016-12-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There might be systems where MAP_32BIT is not defined, like some some RHEL7 powerpc versions. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Kyle McMartin <kyle@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Fixes: 256763b01741 ("perf trace beauty mmap: Add more conditional defines") Link: http://lkml.kernel.org/r/1481831814-23683-1-git-send-email-jolsa@kernel.org [ Changed the Fixme cset to the one removing the conditional switch case for MAP_32BIT ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | tools lib bpf: Add flags to bpf_create_map()Joe Stringer2016-12-153-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 6c905981743 ("bpf: pre-allocate hash map elements") introduces map_flags to bpf_attr for BPF_MAP_CREATE command. Expose this new parameter in libbpf. By exposing it, users can access flags such as whether or not to preallocate the map. Signed-off-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Link: http://lkml.kernel.org/r/20161209024620.31660-4-joe@ovn.org [ Added clarifying comment made by Wang Nan ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | tools lib bpf: use __u32 from linux/types.hJoe Stringer2016-12-152-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes the following issue when building without access to 'u32' type: ./tools/lib/bpf/bpf.h:27:23: error: unknown type name ‘u32’ Signed-off-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Link: http://lkml.kernel.org/r/20161209024620.31660-3-joe@ovn.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.hJoe Stringer2016-12-151-229/+364
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The tools version of this header is out of date; update it to the latest version from the kernel headers. Signed-off-by: Joe Stringer <joe@ovn.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Link: http://lkml.kernel.org/r/20161209024620.31660-2-joe@ovn.org [ Sync it harder, after merging with what was in net-next via perf/urgent via torvalds/master to get BPG_PROG_(AT|DE)TACH, etc ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf annotate: Fix jump target outside of function address rangeRavi Bangoria2016-12-153-9/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If jump target is outside of function range, perf is not handling it correctly. Especially when target address is lesser than function start address, target offset will be negative. But, target address declared to be unsigned, converts negative number into 2's complement. See below example. Here target of 'jumpq' instruction at 34cf8 is 34ac0 which is lesser than function start address(34cf0). 34ac0 - 34cf0 = -0x230 = 0xfffffffffffffdd0 Objdump output: 0000000000034cf0 <__sigaction>: __GI___sigaction(): 34cf0: lea -0x20(%rdi),%eax 34cf3: cmp -bashx1,%eax 34cf6: jbe 34d00 <__sigaction+0x10> 34cf8: jmpq 34ac0 <__GI___libc_sigaction> 34cfd: nopl (%rax) 34d00: mov 0x386161(%rip),%rax # 3bae68 <_DYNAMIC+0x2e8> 34d07: movl -bashx16,%fs:(%rax) 34d0e: mov -bashxffffffff,%eax 34d13: retq perf annotate before applying patch: __GI___sigaction /usr/lib64/libc-2.22.so lea -0x20(%rdi),%eax cmp -bashx1,%eax v jbe 10 v jmpq fffffffffffffdd0 nop 10: mov _DYNAMIC+0x2e8,%rax movl -bashx16,%fs:(%rax) mov -bashxffffffff,%eax retq perf annotate after applying patch: __GI___sigaction /usr/lib64/libc-2.22.so lea -0x20(%rdi),%eax cmp -bashx1,%eax v jbe 10 ^ jmpq 34ac0 <__GI___libc_sigaction> nop 10: mov _DYNAMIC+0x2e8,%rax movl -bashx16,%fs:(%rax) mov -bashxffffffff,%eax retq Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Chris Riyder <chris.ryder@arm.com> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Markus Trippelsdorf <markus@trippelsdorf.de> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Taeung Song <treeze.taeung@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1480953407-7605-3-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf annotate: Support jump instruction with target as second operandRavi Bangoria2016-12-151-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Architectures like PowerPC have jump instructions that includes a target address as a second operand. For example, 'bne cr7,0xc0000000000f6154'. Add support for such instruction in perf annotate. objdump o/p: c0000000000f6140: ld r9,1032(r31) c0000000000f6144: cmpdi cr7,r9,0 c0000000000f6148: bne cr7,0xc0000000000f6154 c0000000000f614c: ld r9,2312(r30) c0000000000f6150: std r9,1032(r31) c0000000000f6154: ld r9,88(r31) Corresponding perf annotate o/p: Before patch: ld r9,1032(r31) cmpdi cr7,r9,0 v bne 3ffffffffff09f2c ld r9,2312(r30) std r9,1032(r31) 74: ld r9,88(r31) After patch: ld r9,1032(r31) cmpdi cr7,r9,0 v bne 74 ld r9,2312(r30) std r9,1032(r31) 74: ld r9,88(r31) Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Chris Riyder <chris.ryder@arm.com> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Markus Trippelsdorf <markus@trippelsdorf.de> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Taeung Song <treeze.taeung@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1480953407-7605-2-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf record: Force ignore_missing_thread for uid optionJiri Olsa2016-12-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable perf_evsel::ignore_missing_thread for -u option to ignore complete failure if any of the user's processes die between its enumeration and time we open the event. Committer notes: While doing a 'make -j4 allmodconfig' we sometimes get into the race: Before: # perf record -u acme Error: The sys_perf_event_open() syscall returned with 3 (No such process) for event (cycles:ppp). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? # After: [root@jouet ~]# perf record -u acme WARNING: Ignored open failure for pid 9888 WARNING: Ignored open failure for pid 18059 [root@jouet ~]# Which is an improvement, with the races not preventing the remaining threads for the specified user from being monitored, but the message probably needs further clarification. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481538943-21874-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf evsel: Allow to ignore missing pidJiri Olsa2016-12-153-0/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding perf_evsel::ignore_missing_cpu_thread bool. When set true, it allows perf to ignore error of missing pid of perf event syscall. We remove missing thread id from the thread_map, so the rest of the processing like ioctl and mmap won't get disturbed with -1 fd. The reason for supporting this is to ease up monitoring group of pids, that 'disappear' before perf opens their event. This currently leads perf to report error and exit and makes perf record's -u option unusable under certain setup. With this change we will allow this race and ignore such failure with following warning: WARNING: Ignored open failure for pid 8605 Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20161213074622.GA3084@krava Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf thread_map: Add thread_map__remove functionJiri Olsa2016-12-155-0/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add thread_map__remove function to remove thread from thread map. Add automated test also. Committer notes: Testing it: # perf test "Remove thread map" 39: Remove thread map : Ok # perf test -v "Remove thread map" 39: Remove thread map : --- start --- test child forked, pid 4483 2 threads: 4482, 4483 1 thread: 4483 0 thread: test child finished with 0 ---- end ---- Remove thread map: Ok # Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481538943-21874-4-git-send-email-jolsa@kernel.org [ Added stdlib.h, to get the free() declaration ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf evsel: Use variable instead of repeating lengthy FD macroJiri Olsa2016-12-151-8/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's more readable and will ease up following patches. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1481538943-21874-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf mem: Fix --all-user/--all-kernel optionsJiri Olsa2016-12-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Removing extra '--' prefix. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Fixes: ad16511b0e40 ("perf mem: Add -U/-K (--all-user/--all-kernel) options") Link: http://lkml.kernel.org/r/1481538943-21874-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf tools: Remove some needless __maybe_unusedArnaldo Carvalho de Melo2016-12-153-11/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I.e. those parameters/functions _are_ used, so ditch that misleading attribute. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-13cqtjh0yojg5gzvpq1zzpl0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Show callchains for idle statNamhyung Kim2016-12-151-0/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When --idle-hist option is used with --summary, it now shows idle stats with callchains like below: Idle stats by callchain: CPU 0: 902.195 msec Idle time (msec) Count Callchains ---------------- ------- -------------------------------------------------- 370.589 69 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- entry_SYSCALL_64_fastpath 178.799 17 worker_thread <- kthread <- ret_from_fork 128.352 17 schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork 125.111 19 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_select <- core_sys_select 71.599 50 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_poll 23.146 1 rcu_gp_kthread <- kthread <- ret_from_fork 4.510 1 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- do_syscall_64 0.085 1 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- do_restart_poll ... Committer notes: Extra testing: # uname -a Linux jouet 4.8.8-300.fc25.x86_64 #1 SMP Tue Nov 15 18:10:06 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux 1) Run 'perf sched record -g' 2) Run 'perf sched timehist --idle --summary' <SNIP> Idle stats by callchain: CPU 0: 13456.840 msec Idle time (msec) Count Callchains ---------------- ----- -------------------------------------------------- 5386.637 3283 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_poll 2750.238 2299 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- do_syscall_64 1275.672 1287 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- entry_SYSCALL_64_fastpath 936.322 452 worker_thread <- kthread <- ret_from_fork 741.311 385 rcu_nocb_kthread <- kthread <- ret_from_fork 729.385 248 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_ppoll 365.386 229 irq_thread <- kthread <- ret_from_fork 338.934 265 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- entry_SYSCALL_64_fastpath 219.488 201 schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork 186.839 410 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- do_syscall_64 142.541 59 kvm_vcpu_block <- kvm_arch_vcpu_ioctl_run <- kvm_vcpu_ioctl <- do_vfs_ioctl <- sys_ioctl 83.887 92 smpboot_thread_fn <- kthread <- ret_from_fork 62.722 96 do_exit <- do_group_exit <- 0x2a5594 <- entry_SYSCALL_64_fastpath 47.894 83 pipe_wait <- pipe_read <- __vfs_read <- vfs_read <- sys_read 46.554 61 rcu_gp_kthread <- kthread <- ret_from_fork 34.337 21 schedule_timeout <- intel_fbc_work_fn <- process_one_work <- worker_thread <- kthread 29.521 14 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_select <- core_sys_select 20.274 10 schedule_timeout <- io_schedule_timeout <- bit_wait_io <- __wait_on_bit <- out_of_line_wait_on_bit 15.085 55 schedule_timeout <- unix_stream_read_generic <- unix_stream_recvmsg <- sock_recvmsg <- SYSC_recvfrom <SNIP> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-7-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Add -I/--idle-hist optionNamhyung Kim2016-12-152-5/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The --idle-hist option is to analyze system idle state so which process makes cpu to go idle. If this option is specified, non-idle events will be skipped and processes switching to/from idle will be shown. This option is mostly useful when used with --summary(-only) option. In the idle-time summary view, idle time is accounted to previous thread which is run before idle task. The example output looks like following: Idle-time summary comm parent sched-out idle-time min-idle avg-idle max-idle stddev migrations (count) (msec) (msec) (msec) (msec) % -------------------------------------------------------------------------------------------- rcu_preempt[7] 2 95 550.872 0.011 5.798 23.146 7.63 0 migration/1[16] 2 1 15.558 15.558 15.558 15.558 0.00 0 khugepaged[39] 2 1 3.062 3.062 3.062 3.062 0.00 0 kworker/0:1H[124] 2 2 4.728 0.611 2.364 4.116 74.12 0 systemd-journal[167] 1 1 4.510 4.510 4.510 4.510 0.00 0 kworker/u16:3[558] 2 13 74.737 0.080 5.749 12.960 21.96 0 irq/34-iwlwifi[628] 2 21 118.403 0.032 5.638 23.990 24.00 0 kworker/u17:0[673] 2 1 3.523 3.523 3.523 3.523 0.00 0 dbus-daemon[722] 1 1 6.743 6.743 6.743 6.743 0.00 0 ifplugd[741] 1 1 58.826 58.826 58.826 58.826 0.00 0 wpa_supplicant[1490] 1 1 13.302 13.302 13.302 13.302 0.00 0 wpa_actiond[1492] 1 2 4.064 0.168 2.032 3.896 91.72 0 dockerd[1500] 1 1 0.055 0.055 0.055 0.055 0.00 0 ... Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-6-namhyung@kernel.org Link: http://lkml.kernel.org/r/20161213080632.19099-2-namhyung@kernel.org [ Merged fix sent by Namhyumg, as posted in the second Link: tag ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Skip non-idle events when necessaryNamhyung Kim2016-12-151-7/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sometimes it only focuses on idle-related events like upcoming idle-hist feature. In this case we don't want to see other event to reduce noise. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-5-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Save callchain when entering idleNamhyung Kim2016-12-151-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to investigate the idleness reason, it is necessary to keep the callchains when entering idle. This can be identified by the sched:sched_switch event having the next_pid field as 0. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-4-namhyung@kernel.org Link: http://lkml.kernel.org/r/20161213080632.19099-1-namhyung@kernel.org [ Merged fix from Namhyung, see second Link: tag ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf sched timehist: Introduce struct idle_time_dataNamhyung Kim2016-12-151-4/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The struct idle_time_data is to keep idle stats with callchains entering to the idle task. The normal thread_runtime calculation is done transparently since it extends the struct thread_runtime. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20161208144755.16673-3-namhyung@kernel.org [ Align struct field names ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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