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2017-03-13perf tools: Missing c2c command in command-listChangbin Du1-0/+1
Add the c2c command to command-list.txt so perf help can list this command. Committer notes: Before: # perf help | grep c2c # After: # perf help | grep c2c c2c Shared Data C2C/HITM Analyzer. # Signed-off-by: Changbin Du <changbin.du@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170313082845.23373-1-changbin.du@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-07perf c2c: Fix display bug when using pipeNamhyung Kim1-1/+1
Currently 'perf c2c report' determines display mode using the --stdio option, but it could be a problem if stdout is not a tty since setup_browser falls back to stdio in this case. But perf c2c didn't know this and tried to use TUI browser anyway. It should check "use_browser" variable instead. For example, the following command showed nothing and broke terminal setting. Now it's fixed.. $ perf c2c report | head ================================================= Trace Event Information ================================================= Total records : 136 Locked Load/Store Operations : 6 Load Operations : 62 Loads - uncacheable : 0 Loads - IO : 1 Loads - Miss : 7 Loads - no mapping : 2 Committer notes: When trying it without a proper perf.data file it results in a stuck terminal, just as Namhyung reported above: [acme@jouet ~]$ perf c2c report | head WARNING: no sample cpu value[acme@jouet ~]$ One has to kill it from some other xterm. Confirm that this patch fixes it: After: $ perf c2c report | head WARNING: no sample cpu value================================================= Trace Event Information ================================================= Total records : 14 Locked Load/Store Operations : 0 Load Operations : 0 Loads - uncacheable : 0 Loads - IO : 0 Loads - Miss : 0 Loads - no mapping : 0 $ Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170307150851.22304-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-07perf c2c: Clarify help message of --stats optionNamhyung Kim1-1/+1
As it is not strictly asking for only stdio output, but will imply using it. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170307150851.22304-5-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-07perf report: Hide tip message when -q option is givenNamhyung Kim1-2/+1
The tip message at the end was printed regardless of the -q option. Originally, the message suggested only '-s comm,dso' option for higher level view when no sort option and parent option were given. Now it shows random help message regardless of the options so the condition can be simplified to honor the -q option. Committer notes: Before: $ perf report --stdio -q 42.77% ls ls [.] _init 13.21% ls ld-2.24.so [.] match_symbol 12.55% ls libc-2.24.so [.] __strcoll_l 11.94% ls libc-2.24.so [.] _init # # (Tip: Show current config key-value pairs: perf config --list) # $ After: $ perf report --stdio -q 42.77% ls ls [.] _init 13.21% ls ld-2.24.so [.] match_symbol 12.55% ls libc-2.24.so [.] __strcoll_l 11.94% ls libc-2.24.so [.] _init $ We still have those two extra lines tho (that git commit insists in turning into one, or git commit --amend doesn't make me add), food for another patch... Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170307150851.22304-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-06perf bench numa: Add more comment for -c optionJiri Olsa1-1/+2
Adding more commentary for -c/--show_convergence option, to explain how the convergence is defined. Before: -c, --show_convergence show convergence details Now: -c, --show_convergence convergence is reached when each process \ (all its threads) is running on a single NUMA node. Suggested--by: Jiri Hladky <jhladky@redhat.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Hladky <jhladky@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1488732011-27384-1-git-send-email-jolsa@kernel.org [ Rephrased a bit based on a IRC conversation with Jiri ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-05Linux 4.11-rc1Linus Torvalds1-2/+2
2017-03-03strparser: destroy workqueue on module exitWANG Cong1-0/+1
Fixes: 43a0c6751a32 ("strparser: Stream parser for messages") Cc: Tom Herbert <tom@herbertland.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-03Documentation/sphinx: fix primary_domain configurationJohn Keeping1-1/+1
With Sphinx 1.5.3 I get the warning: WARNING: primary_domain 'C' not found, ignored. It seems that domain names in Sphinx are case-sensitive and for the C domain the name must be lower case. Signed-off-by: John Keeping <john@metanate.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-03docs: Fix htmldocs build failureMartyn Welch1-2/+2
Build of HTML docs failing due to conversion of deviceiobook.tmpl in 8a8a602f and regulator.tmpl in 028f2533 to RST without removing from DOCBOOKS in Makefile, resulting (in the case of deviceiobook) the following error: make[1]: *** No rule to make target 'Documentation/DocBook/deviceiobook.xml', needed by 'Documentation/DocBook/deviceiobook.aux.xml'. Stop. Makefile:1452: recipe for target 'htmldocs' failed make: *** [htmldocs] Error 2 Update DOCBOOKS to reflect available books. Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-03doc/ko_KR/memory-barriers: Update control-dependencies sectionSeongJae Park1-31/+37
This commit applies upstream change, commit c8241f8553e8 ("doc: Update control-dependencies section of memory-barriers.txt"), to Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-03pcieaer doc: update the linkCao jin1-1/+1
The original link is empty, replace it. Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-03Documentation: Update path to sysrq.txtKrzysztof Kozlowski4-6/+6
Commit 9d85025b0418 ("docs-rst: create an user's manual book") moved the sysrq.txt leaving old paths in the kernel docs. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-03tools build: Use the same CC for feature detection and actual buildArnaldo Carvalho de Melo1-2/+2
When build with: 'make CC=clang' we were not using that CC to do feature detection, which resulted in features being detected with gcc and then the actual tools being built with clang. Most of the time these compilers are compatible enough, so no problem was being noticed. As soon as a system with an old enough clang, one that hasn't the cpuid.h header is used, and a gcc with it, the "get_cpuid" feature will be found available but then code that will use can't be compiled. Noticed with this combination: / $ gcc --version | head -1 gcc (Alpine 6.3.0) 6.3.0 / $ clang --version | head -1 clang version 3.8.1 (tags/RELEASE_381/final) / $ cat /etc/alpine-release 3.5.0 / $ 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-60q18nvlvgpyfv7e2qqgx4ou@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf bench futex: Fix build on musl + clangArnaldo Carvalho de Melo5-0/+5
When building with clang on a musl libc system, Alpine Linux, we end up hitting a problem where memset() is used but its prototype is not present, add it to avoid this: bench/futex-wake.c:99:3: error: implicitly declaring library function 'memset' with type 'void *(void *, int, unsigned long)' [-Werror,-Wimplicit-function-declaration] CPU_ZERO(&cpu); ^ /usr/include/sched.h:127:23: note: expanded from macro 'CPU_ZERO' #define CPU_ZERO(set) CPU_ZERO_S(sizeof(cpu_set_t),set) ^ /usr/include/sched.h:110:30: note: expanded from macro 'CPU_ZERO_S' #define CPU_ZERO_S(size,set) memset(set,0,size) ^ bench/futex-wake.c:99:3: note: include the header <string.h> or explicitly provide a declaration for 'memset' Found while updating my test build containers to build perf with clang in more systems. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Davidlohr Bueso <dave@stgolabs.net> 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-jh10vaz2r98zl6gm5iau8prr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf bench futex: Use __maybe_unusedArnaldo Carvalho de Melo1-6/+4
Instead of attributing a variable to itself to silence the compiler, use the attribute designed for that, avoiding this: In file included from bench/futex-hash.c:24: bench/futex.h:95:7: error: explicitly assigning value of variable of type 'pthread_attr_t *' to itself [-Werror,-Wself-assign] attr = attr; ~~~~ ^ ~~~~ bench/futex.h:96:13: error: explicitly assigning value of variable of type 'size_t' (aka 'unsigned long') to itself [-Werror,-Wself-assign] cpusetsize = cpusetsize; ~~~~~~~~~~ ^ ~~~~~~~~~~ bench/futex.h:97:9: error: explicitly assigning value of variable of type 'cpu_set_t *' (aka 'struct cpu_set_t *') to itself [-Werror,-Wself-assign] cpuset = cpuset; ~~~~~~ ^ ~~~~~~ That is only triggered when HAVE_PTHREAD_ATTR_SETAFFINITY_NP isn't set. 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-14ws1d1elj2d5ej8g7cwdqau@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools build: Add test for sched_getcpu()Arnaldo Carvalho de Melo7-9/+24
Instead of trying to go on adding more ifdef conditions, do a feature test and define HAVE_SCHED_GETCPU_SUPPORT instead, then use it to provide the prototype. No need to change the stub, as it is already a __weak symbol. 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-yge89er9g90sc0v6k0a0r5tr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf tools: Force uncore events to system wide monitoringJiri Olsa2-5/+33
Make system wide (-a) the default option if no target was specified and one of following conditions is met: - there's no workload specified (current behaviour) - there is workload specified but all requested events are system wide ones Mixed events core/uncore with workload: $ perf stat -e 'uncore_cbox_0/clockticks/,cycles' sleep 1 Performance counter stats for 'sleep 1': <not supported> uncore_cbox_0/clockticks/ 980,489 cycles 1.000897406 seconds time elapsed Uncore event with workload: $ perf stat -e 'uncore_cbox_0/clockticks/' sleep 1 Performance counter stats for 'system wide': 281,473,897,192,670 uncore_cbox_0/clockticks/ 1.000833784 seconds time elapsed Committer note: When testing I realized the default case for !root, i.e. no events passed via -e, was broke by v2 of this patch, reported and after a patch provided by Jiri it is back working: [acme@jouet linux]$ perf stat usleep 1 Performance counter stats for 'usleep 1': 0.401335 task-clock:u (msec) # 0.297 CPUs utilized 0 context-switches:u # 0.000 K/sec 0 cpu-migrations:u # 0.000 K/sec 48 page-faults:u # 0.120 M/sec 458,146 cycles:u # 1.142 GHz 245,113 instructions:u # 0.54 insn per cycle 47,991 branches:u # 119.578 M/sec 4,022 branch-misses:u # 8.38% of all branches 0.001350029 seconds time elapsed [acme@jouet linux]$ Suggested-and-Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> 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: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20170227094818.GA12764@krava Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03trace/kprobes: Add back warning about offset in return probesSteven Rostedt (VMware)1-0/+5
Let's not remove the warning about offsets and return probes when the offset is invalid. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/20170227115204.00f92846@gandalf.local.home Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf intel-PT/BTS: Add missing initializationAdrian Hunter1-0/+2
$ perf test decoder 57: x86 instruction decoder - new instructions : FAILED! $ Failed to decode 'rel' value (0xfffffffc vs expected 0): 0f 1b 80 78 56 34 12 bndstx %bnd0,0x12345678(%rax) Failed to decode 'rel' value (0xfffffffc vs expected 0): 0f 1b 85 78 56 34 12 bndstx %bnd0,0x12345678(%rbp) Failed to decode 'rel' value (0xfffffffc vs expected 0): 0f 1b 84 01 78 56 34 12 bndstx %bnd0,0x12345678(%rcx,%rax,1) Failed to decode 'rel' value (0xfffffffc vs expected 0): 0f 1b 84 05 78 56 34 12 bndstx %bnd0,0x12345678(%rbp,%rax,1) Failed to decode 'rel' value (0xfffffffc vs expected 0): 0f 1b 84 08 78 56 34 12 bndstx %bnd0,0x12345678(%rax,%rcx,1) There is missing initialization. It only affects the test because it is checking 'rel' even in cases where there is no value. Fix it. Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/08c6ad07-7994-3e56-b20e-d75727ca7765@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf probe: Generalize probe event file open routineNaveen N. Rao2-9/+12
Generalize probe event file open routine into a generic function for opening trace files. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/b580465c7a4dcd5d3b40fdf8568e6be45d0a6333.1487849577.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03trace/kprobes: Allow return probes with offsets and absolute addressesNaveen N. Rao2-8/+1
Since the kernel includes many non-global functions with same names, we will need to use offsets from other symbols (typically _text/_stext) or absolute addresses to place return probes on specific functions. Also, the core register_kretprobe() API never forbid use of offsets or absolute addresses with kretprobes. Allow its use with the trace infrastructure. To distinguish kernels that support this, update ftrace README to explicitly call this out. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/183e7ce2921a08c9c755ee9a5da3134febc6695b.1487770934.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03kretprobes: Ensure probe location is at function entryNaveen N. Rao2-0/+14
kretprobes can be registered by specifying an absolute address or by specifying offset to a symbol. However, we need to ensure this falls at function entry so as to be able to determine the return address. Validate the same during kretprobe registration. By default, there should not be any offset from a function entry, as determined through a kallsyms_lookup(). Introduce arch_function_offset_within_entry() as a way for architectures to override this. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/f1583bc4839a3862cfc2acefcc56f9c8837fa2ba.1487770934.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf ftrace: Use pager for displaying resultNamhyung Kim1-0/+3
It's convenient to use the pager when seeing many lines of result. Note that setup_pager() should be called after perf_evlist__prepare_workload() since they can interfere each other regarding shared stdio streams. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170224011251.14946-4-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf ftrace: Add support for -a and -C optionNamhyung Kim2-0/+74
The -a/--all-cpus and -C/--cpu option is for controlling tracing cpus. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170224011251.14946-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf cpumap: Introduce cpu_map__snprint_mask()Namhyung Kim2-0/+47
The cpu_map__snprint_mask() generates a string representation of a cpumask bitmap. For cpu 0 to 11, it'll return "fff". Committer notes: Fix compiler warning on some toolchains: 19 fedora:24-x-ARC-uClibc: FAIL CC /tmp/build/perf/util/cpumap.o util/cpumap.c: In function 'hex_char': util/cpumap.c:679:2: error: comparison is always true due to limited range of data type [-Werror=type-limits] if (0 <= val && val <= 9) ^ cc1: all warnings being treated as errors Applying patch from Namhyung that makes function receive an 'unsigned char', that is what the callers are passing to this function. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170224011251.14946-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf ftrace: Add support for --pid optionNamhyung Kim2-27/+68
The -p (--pid) option enables to trace existing process by its pid. Committer notes: Testing it: Using the function_graph tracer on a process that is just waiting for user input and thus will make 'perf ftrace' sit there waiting for that, then press any key on that mutt session and see what happens: # perf ftrace -t function_graph -p `pidof mutt` | head -40 2) 1.038 us | switch_mm_irqs_off(); ------------------------------------------ 2) <idle>-0 => mutt-3595 ------------------------------------------ 2) | finish_task_switch() { 2) | smp_irq_work_interrupt() { 2) | irq_enter() { 2) 0.180 us | rcu_irq_enter(); 2) 1.248 us | } 2) | __wake_up() { 2) 0.126 us | _raw_spin_lock_irqsave(); 2) | __wake_up_common() { 2) | pollwake() { 2) | default_wake_function() { 2) | try_to_wake_up() { 2) 0.662 us | _raw_spin_lock_irqsave(); 2) | select_task_rq_fair() { 2) 1.719 us | effective_load.isra.41(); 2) 1.343 us | effective_load.isra.41(); 2) | select_idle_sibling() { 2) 0.331 us | idle_cpu(); 2) 1.458 us | } 2) 8.350 us | } 2) 0.200 us | _raw_spin_lock(); 2) | ttwu_do_activate() { 2) | activate_task() { 2) 0.136 us | update_rq_clock.part.77(); 2) | enqueue_task_fair() { 2) | enqueue_entity() { 2) 0.146 us | update_curr(); 2) 0.330 us | account_entity_enqueue(); 2) 0.280 us | update_cfs_shares(); 2) 0.321 us | place_entity(); 2) 0.206 us | __enqueue_entity(); 2) 6.926 us | } 2) | enqueue_entity() { 2) 0.105 us | update_curr(); 2) 0.175 us | account_entity_enqueue(); 2) 0.531 us | update_cfs_shares(); # Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170224011251.14946-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf tools: Allow sorting by symbol sizeCharles Baylis4-0/+44
Add new sort key 'symbol_size' to allow user to sort by symbol size, or (more usefully) display the symbol size using --fields=...,symbol_size. Committer note: Testing it together with the recently added -q, to remove the headers, and using the '+' sign with -s, to add the symbol_size sort order to the default, which is '-s/--sort comm,dso,symbol': # perf report -q -s +symbol_size | head -10 10.39% swapper [kernel.vmlinux] [k] intel_idle 270 3.45% swapper [kernel.vmlinux] [k] update_blocked_averages 1546 2.61% swapper [kernel.vmlinux] [k] update_load_avg 1292 2.36% swapper [kernel.vmlinux] [k] update_cfs_shares 240 1.83% swapper [kernel.vmlinux] [k] __hrtimer_run_queues 606 1.74% swapper [kernel.vmlinux] [k] update_cfs_rq_load_avg. 1187 1.66% swapper [kernel.vmlinux] [k] apic_timer_interrupt 152 1.60% CPU 0/KVM [kvm] [k] kvm_set_msr_common 3046 1.60% gnome-shell libglib-2.0.so.0 [.] g_slist_find 37 1.46% gnome-termina libglib-2.0.so.0 [.] g_hash_table_lookup 370 # Signed-off-by: Charles Baylis <charles.baylis@linaro.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1487943176-13840-1-git-send-email-charles.baylis@linaro.org [ Use symbol__size(), remove needless %lld + (long long) casting ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf evlist: Clarify a bit the use of perf_mmap->refcntArnaldo Carvalho de Melo1-1/+12
This is an odd refcount use case, so add some more comments to help understand that when it hits zero it really means that the mmap()ed area (on a perf_event_open() returned fd) has been munmap()ed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20170223162344.GD3595@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf thread_map: Convert thread_map.refcnt from atomic_t to refcount_tElena Reshetova3-15/+15
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-10-git-send-email-elena.reshetova@intel.com [ Did missing tests/thread-map.c conversion ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf thread: convert thread.refcnt from atomic_t to refcount_tElena Reshetova3-6/+6
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-9-git-send-email-elena.reshetova@intel.com [ Did missing conversion in __machine__remove_thread() ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf evlist: Convert perf_map.refcnt from atomic_t to refcount_tElena Reshetova2-11/+11
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-8-git-send-email-elena.reshetova@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf map: Convert map_groups.refcnt from atomic_t to refcount_tElena Reshetova3-10/+10
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-7-git-send-email-elena.reshetova@intel.com [ Did the missing conversion of tests/thread-mg-share.c too ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf map: Convert map.refcnt from atomic_t to refcount_tElena Reshetova2-6/+6
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-6-git-send-email-elena.reshetova@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf dso: Convert dso.refcnt from atomic_t to refcount_tElena Reshetova2-5/+5
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-5-git-send-email-elena.reshetova@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf comm: Convert comm_str.refcnt from atomic_t to refcount_tElena Reshetova1-9/+6
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-4-git-send-email-elena.reshetova@intel.com [ Reinstated comm_str__get() function, needed when reusing entries in the rbtree ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf cpumap: Convert cpu_map.refcnt from atomic_t to refcount_tElena Reshetova3-11/+11
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-3-git-send-email-elena.reshetova@intel.com [ fixed mixed conversion to refcount in tests/cpumap.c ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf cgroup: Convert cgroup_sel.refcnt from atomic_t to refcount_tElena Reshetova2-5/+5
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: alsa-devel@alsa-project.org Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1487691303-31858-2-git-send-email-elena.reshetova@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools include: Adopt kernel's refcount.hArnaldo Carvalho de Melo2-0/+152
To aid in catching bugs when using atomics as a reference count. This is a trimmed down version with just what is used by tools/ at this point. After this, the patches submitted by Elena for tools/ doing the conversion from atomic_ to recount_ methods can be applied and tested. To activate it, buint perf with: make DEBUG=1 -C tools/perf Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.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-dqtxsumns9ov0l9r5x398f19@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools include: Add UINT_MAX def to kernel.hArnaldo Carvalho de Melo1-0/+4
The kernel has it and some files we got from there would require us including the userland header for that, so add it conditionally. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.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-gmwyal7c9vzzttlyk6u59rzn@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools include: Provide gcc based cmpxchg fallback for !x86Arnaldo Carvalho de Melo1-0/+8
We've been using an atomic_t implementation subset based on the gcc builtin functions for a while, now, with refcount.h we need cmpxchg(), use gcc's __sync_val_compare_and_swap() for that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-b9zovyxgpa0c4vi3nm0kjo97@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools include: Introduce atomic_cmpxchg_{relaxed,release}()Arnaldo Carvalho de Melo1-0/+6
Will be used by refcnt.h Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.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-jszriruqfqpez1bkivwfj6qb@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools arch x86: Introduce atomic_cmpxchg()Arnaldo Carvalho de Melo1-0/+7
Will be used by atomic_cmpxchg_relaxed(), in turn used by refcount.h. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.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-kdmovd3l4gw5b1w31ypr6ddv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools arch x86: Include asm/cmpxchg.hArnaldo Carvalho de Melo3-0/+99
Will be included from atomic.h and used in refcount.h Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.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-pzrydfee75mhq64kazxmf9it@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03tools include: Adopt __compiletime_errorArnaldo Carvalho de Melo2-0/+8
From the kernel, get the gcc one and provide the fallback so that we can continue build with other compilers, such as with clang. Will be used by tools/arch/x86/include/asm/cmpxchg.h. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Elena Reshetova <elena.reshetova@intel.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-pecgz6efai4a9euuk4rxuotr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf stat: Issue a HW watchdog disable hintBorislav Petkov1-0/+11
When using perf stat on an AMD F15h system with the default hw events attributes, some of the events don't get counted: Performance counter stats for 'sleep 1': 0.749208 task-clock (msec) # 0.001 CPUs utilized 1 context-switches # 0.001 M/sec 0 cpu-migrations # 0.000 K/sec 54 page-faults # 0.072 M/sec 1,122,815 cycles # 1.499 GHz 286,740 stalled-cycles-frontend # 25.54% frontend cycles idle <not counted> stalled-cycles-backend (0.00%) ^^^^^^^^^^^^ <not counted> instructions (0.00%) ^^^^^^^^^^^^ <not counted> branches (0.00%) <not counted> branch-misses (0.00%) 1.001550070 seconds time elapsed The reason is that we have the HW watchdog consuming one PMU counter and when perf tries to schedule 6 events on 6 counters and some of those counters are constrained to only a specific subset of PMCs by the hardware, the event scheduling fails. So issue a hint to disable the HW watchdog around a perf stat session. Committer note: Testing it... # perf stat -d usleep 1 Performance counter stats for 'usleep 1': 1.180203 task-clock (msec) # 0.490 CPUs utilized 1 context-switches # 0.847 K/sec 0 cpu-migrations # 0.000 K/sec 54 page-faults # 0.046 M/sec 184,754 cycles # 0.157 GHz 714,553 instructions # 3.87 insn per cycle 154,661 branches # 131.046 M/sec 7,247 branch-misses # 4.69% of all branches 219,984 L1-dcache-loads # 186.395 M/sec 17,600 L1-dcache-load-misses # 8.00% of all L1-dcache hits (90.16%) <not counted> LLC-loads (0.00%) <not counted> LLC-load-misses (0.00%) 0.002406823 seconds time elapsed Some events weren't counted. Try disabling the NMI watchdog: echo 0 > /proc/sys/kernel/nmi_watchdog perf stat ... echo 1 > /proc/sys/kernel/nmi_watchdog # Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Ingo Molnar <mingo@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <rric@kernel.org> Cc: Vince Weaver <vince@deater.net> Link: http://lkml.kernel.org/r/20170211183218.ijnvb5f7ciyuunx4@pd.tnic Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03perf vendor events: Add mapping for KnightsMill PMU eventsKarol Wachowski1-0/+1
Reuse events from KnightsLanding for KnightsMill Signed-off-by: Karol Wachowski <karol.wachowski@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <peter.zijlstra@intel.com> Cc: Piotr Luc <piotr.luc@intel.com> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Link: http://lkml.kernel.org/r/1487591440-25172-1-git-send-email-karol.wachowski@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-03-03sfc: fix IPID endianness in TSOv2Edward Cree1-1/+1
The value we read from the header is in network byte order, whereas EFX_POPULATE_QWORD_* takes values in host byte order (which it then converts to little-endian, as MCDI is little-endian). Fixes: e9117e5099ea ("sfc: Firmware-Assisted TSO version 2") Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-03sfc: avoid max() in array sizeEdward Cree1-5/+5
It confuses sparse, which thinks the size isn't constant. Let's achieve the same thing with a BUILD_BUG_ON, since we know which one should be bigger and don't expect them ever to change. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-03rds: remove unnecessary returned value checkZhu Yanjun4-14/+4
The function rds_trans_register always returns 0. As such, it is not necessary to check the returned value. Cc: Joe Jin <joe.jin@oracle.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-03rxrpc: Fix potential NULL-pointer exceptionDavid Howells1-7/+8
Fix a potential NULL-pointer exception in rxrpc_do_sendmsg(). The call state check that I added should have gone into the else-body of the if-statement where we actually have a call to check. Found by CoverityScan CID#1414316 ("Dereference after null check"). Fixes: 540b1c48c37a ("rxrpc: Fix deadlock between call creation and sendmsg/recvmsg") Reported-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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