- 22 Feb, 2016 5 commits
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Namhyung Kim authored
The srcline, srcfile and trace sort keys can have long entries. With commit 89fee709 ("perf hists: Do column alignment on the format iterator"), it now aligns output with hist_entry__snprintf_alignment(). So each (possibly long) sort entries don't need to do it themselves. Signed-off-by:
Namhyung Kim <namhyung@kernel.org> Acked-by:
Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1456101153-14519-1-git-send-email-namhyung@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
Normally the hist entry's srcline and/or srcfile is set during sorting. However sometime it's possible to a hist entry's srcline is not set yet after the sorting. This is because the entry is so unique and other sort keys already make it distinct. Then the srcline/file sort didn't have a chance to be called during the sorting. In that case it has NULL srcline/srcfile field and shows nothing. Before: $ perf report -s comm,sym,srcline ... Overhead Command Symbol ----------------------------------------------------------------- 34.42% swapper [k] intel_idle intel_idle.c:0 2.44% perf [.] __poll_nocancel (null) 1.70% gnome-shell [k] fw_domains_get (null) 1.04% Xorg [k] sock_poll (null) After: 34.42% swapper [k] intel_idle intel_idle.c:0 2.44% perf [.] __poll_nocancel .:0 1.70% gnome-shell [k] fw_domains_get fw_domains_get+42 1.04% Xorg [k] sock_poll socket.c:0 Signed-off-by: -
Namhyung Kim authored
A dynamic entry is created for each tracepoint event. When it sets up the sort key, it checks with existing keys using ->equal() callback. But it missed to set the ->equal for dynamic entries. The following segfault was due to the missing ->equal() callback. (gdb) bt #0 0x0000000000140003 in ?? () #1 0x0000000000537769 in fmt_equal (b=0x2106980, a=0x21067a0) at ui/hist.c:548 #2 perf_hpp__setup_output_field (list=0x8c6d80 <perf_hpp_list>) at ui/hist.c:560 #3 0x00000000004e927e in setup_sorting (evlist=<optimized out>) at util/sort.c:2642 #4 0x000000000043cf50 in cmd_report (argc=<optimized out>, argv=<optimized out>, prefix=<optimized out>) at builtin-report.c:932 #5 0x00000000004865a1 in run_builtin (p=p@entry=0x8bbce0 <commands+192>, argc=argc@entry=7, argv=argv@entry=0x7ffd24d56ce0) at perf.c:390 #6 0x000000000042dc1f in handle_internal_command (argv=0x7ffd24d56ce0, argc=7) at perf.c:451 #7 run_argv (argv=0x7ffd24d56a70, argcp=0x7ffd24d56a7c) at perf.c:495 #8 main (argc=7, argv=0x7ffd24d56ce0) at perf.c:620 Signed-off-by: -
Arnaldo Carvalho de Melo authored
Older compilers don't like this, for instance, on RHEL6.7: CC /tmp/build/perf/util/parse-events.o util/parse-events.c:844: error: redefinition of typedef ‘config_term_func_t’ util/parse-events.c:353: note: previous declaration of ‘config_term_func_t’ was here So remove the second definition, that should've been just moved in 43d0b978 ("perf tools: Enable config and setting names for legacy cache events"), not copied. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 43d0b978 ("perf tools: Enable config and setting names for legacy cache events") Signed-off-by: -
Arnaldo Carvalho de Melo authored
In RHEL 6.7: CC /tmp/build/perf/util/parse-events.o cc1: warnings being treated as errors util/parse-events.c: In function ‘parse_events_add_cache’: util/parse-events.c:366: error: declaration of ‘error’ shadows a global declaration util/util.h:136: error: shadowed declaration is here Rename it to 'err'. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 43d0b978 ("perf tools: Enable config and setting names for legacy cache events") Signed-off-by:
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- 20 Feb, 2016 1 commit
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: User visible changes: - Add 'perf record' --all-user/--all-kernel options, so that one can tell that all the events in the command line should be restricted to the user or kernel levels (Jiri Olsa), i.e.: perf record -e cycles:u,instructions:u is equivalent to: perf record --all-user -e cycles,instructions - Fix percentage update on key press, due to the buffering code (that creates hist_entries that will later be consumed) touching per hists state that is used by the display thread (Namhyung Kim) - Bail out when event modifiers not supported by 'perf stat' are specified, i.e.: (Wang Nan) # perf stat -e cycles/no-inherit/ usleep 1 event syntax error: 'cycles/no-inherit/' \___ 'no-inherit' is not usable in 'perf stat' # perf stat -e cycles/foo/ usleep 1 event syntax error: 'cycles/foo/' \___ unknown term valid terms: config,config1,config2,name # - Enable setting names for legacy cache, raw and numeric events, e.g: (Wang Nan) # perf record -e cycles -e 4:0x6530160/name=evtx,call-graph=fp/ -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.659 MB perf.data (844 samples) ] # perf evlist cycles evtx # Miscelaneous/Infrastructure changes: - Handled scaled == -1 case for counters in 'perf stat', fixing recent, only in perf/core, regression (Andi Kleen) - Reference count the cpu and thread maps at set_maps(), fixing the 'object code reading' 'perf test' entry when it was requesting a perf_event_attr.sample_freq > /proc/sys/kernel/perf_event_max_sample_rate (Arnaldo Carvalho de Melo) - Improve perf_evlist__strerror_open() to provide hints for -EINVAL due to perf_event_attr.sample_freq > /proc/sys/kernel/perf_event_max_sample_rate (Arnaldo Carvalho de Melo) - Add checks to various callchain and histogram routines (Namhyung Kim) - Fix checking asprintf return value when parsing additional event config terms (Wang Nan) Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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- 19 Feb, 2016 20 commits
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Namhyung Kim authored
If it returns an error, warn user and bail out instead of silently ignoring it. Signed-off-by:
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Namhyung Kim authored
Currently hists__collapse_resort() and hists__collapse_insert_entry() don't return an error code. Now that callchain_merge() can check for errors, abort and pass the error to the user. A later patch can add more work which also can fail. Signed-off-by:
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Namhyung Kim authored
Now it can check the error case, so check and pass it to the caller. Signed-off-by:
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Namhyung Kim authored
Now create_child() and add_child() return errors so check and pass it to the caller. Signed-off-by:
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Namhyung Kim authored
The append_chain() might return either result of match_chain() or other (error) code. But match_chain() can return any value in s64 type so it's hard to check the error case. Add new enum match_result and make match_chain() return non-negative values only so that we can check the error cases. Signed-off-by:
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Namhyung Kim authored
Memory allocation in the fill_node() can fail so change its return type to int and check it in add_child() too. Signed-off-by:
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Namhyung Kim authored
The create_child() in add_child() can return NULL in case of memory allocation failure. So check the return value and bail out. The proper error handling will be added later. Signed-off-by:
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Namhyung Kim authored
Currently 'perf top --tui' decrements percentage of all entries on any key press. This is because it adds total period as new samples are added to hists. As perf-top does it currently but added samples are not passed to the display thread, the percentages are decresing continuously. So separate total period stat into a different variable so that it cannot affect the output total period. This new total period stats are used only for calcualating callchain percent limit. Signed-off-by:
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Wang Nan authored
This patch allows setting config terms for legacy cache events. For example: # perf stat -e L1-icache-misses/name=valA/ -e branches/name=valB/ ls ... Performance counter stats for 'ls': 11299 valA 451605 valB 0.000779091 seconds time elapsed # perf record -e cache-misses/name=inh/ -e cache-misses/name=noinh,no-inherit/ bash # ls # exit [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.023 MB perf.data (131 samples) ] # perf report --stdio | grep -B 1 'Event count' # Samples: 105 of event 'inh' # Event count (approx.): 109118 -- # Samples: 26 of event 'noinh' # Event count (approx.): 48302 A test case is introduced to test this feature. Signed-off-by:Wang Nan <wangnan0@huawei.com> Tested-by:
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Wang Nan authored
This patch allows setting config terms for raw and numeric events. For example: # perf stat -e cycles/name=cyc/ ls ... 1821108 cyc ... # perf stat -e r6530160/name=event/ ls ... 1103195 event ... # perf record -e cycles -e 4:0x6530160/name=evtx,call-graph=fp/ -a sleep 1 ... # perf report --stdio ... # Samples: 124 of event 'cycles' 46.61% 0.00% swapper [kernel.vmlinux] [k] cpu_startup_entry 41.26% 0.00% swapper [kernel.vmlinux] [k] start_secondary ... # Samples: 91 of event 'evtx' ... 93.76% 0.00% swapper [kernel.vmlinux] [k] cpu_startup_entry | ---cpu_startup_entry | |--66.63%--call_cpuidle | cpuidle_enter | | ... 3 test cases are introduced to test config terms for symbol, raw and numeric events. Committer note: Further testing shows that we can retrieve the event name using 'perf evlist -v' and looking at the 'config' perf_event_attr field, i.e.: # perf record -e cycles -e 4:0x6530160/name=evtx,call-graph=fp/ -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.724 MB perf.data (2076 samples) ] # perf evlist cycles evtx # perf evlist -v cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 evtx: type: 4, size: 112, config: 0x6530160, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, freq: 1, sample_id_all: 1, exclude_guest: 1 # Signed-off-by: -
Arnaldo Carvalho de Melo authored
To remove duplicated code that differs only in using the matching '/a,b,c/' part or NULL if no event configuration is done ('//' or no pair of slashes at all). Will be used by some new targets allowing the configuration of hardware events, etc. Lifted part of the 'opt_event_config' nonterminal from a patch by Wang Nan. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Cody P Schafer <dev@codyps.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jeremie Galarneau <jeremie.galarneau@efficios.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kirill Smelkov <kirr@nexedi.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/n/tip-e3xzpx9cqsmwnaguaxyw6r42@git.kernel.orgSigned-off-by: -
Wang Nan authored
Following commits will make more events obey /name=newname/ options. This patch makes pmu_event_name() a generic helper. Makes new get_config_name() accept NULL input to make life easier. Signed-off-by:
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Wang Nan authored
'perf stat' accepts some config terms but doesn't apply them. For example: # perf stat -e 'instructions/no-inherit/' -e 'instructions/inherit/' bash # ls # exit Performance counter stats for 'bash': 266258061 instructions/no-inherit/ 266258061 instructions/inherit/ 1.402183915 seconds time elapsed The result is confusing, because user may expect the first 'instructions' event exclude the 'ls' command. This patch forbid most of these config terms for 'perf stat'. Result: # ./perf stat -e 'instructions/no-inherit/' -e 'instructions/inherit/' bash event syntax error: 'instructions/no-inherit/' \___ 'no-inherit' is not usable in 'perf stat' ... We can add blocked config terms back when 'perf stat' really supports them. This patch also removes unavailable config term from error message: # ./perf stat -e 'instructions/badterm/' ls event syntax error: 'instructions/badterm/' \___ unknown term valid terms: config,config1,config2,name # ./perf stat -e 'cpu/badterm/' ls event syntax error: 'cpu/badterm/' \___ unknown term valid terms: pc,any,inv,edge,cmask,event,in_tx,ldlat,umask,in_tx_cp,offcore_rsp,config,config1,config2,name Signed-off-by: -
Wang Nan authored
config_term_names[] is introduced for future commits which will be able to retrieve the config name through the config term. Utilize this array in parse_events_formats_error_string() so the missing '{,no-}inherit' terms are added. Signed-off-by: -
Wang Nan authored
According to man pages, asprintf returns -1 when failure. This patch fixes two incorrect return value checker. Signed-off-by:
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Wang Nan authored
The name of bpf_prog_priv__clear() doesn't follow perf's naming convention. bpf_prog_priv__delete() seems to be a better name. However, bpf_prog_priv__delete() should be a method of 'struct bpf_prog_priv', but its first parameter is 'struct bpf_program'. It is callback from libbpf to clear priv structures when destroying a bpf program. It is actually a method of bpf_program (libbpf object), but bpf_program__ functions should be provided by libbpf. This patch removes the prefix of that function. Signed-off-by:
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Andi Kleen authored
Arnaldo pointed out that the earlier cb110f47 ("perf stat: Move noise/running printing into printout") change changed behavior for not counted counters. This patch fixes it again. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Stephane Eranian <eranian@google.com> Fixes: cb110f47 ("perf stat: Move noise/running printing into printout") Link: http://lkml.kernel.org/r/1455749045-18098-2-git-send-email-andi@firstfloor.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Using 4 kHz is not necessary and sometimes is more than what was auto-tuned: # dmesg | grep max_sample_rate | tail -2 [ 2499.144373] perf interrupt took too long (2501 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [ 3592.413606] perf interrupt took too long (5069 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 Simulating a auto-tune of 2000 we make the test fail, as reported by Steven Noonan for one of his machines, so reduce it to 500 HZ, it is enough to get a good number of samples for this test: # perf test -v 21 2>&1 | grep '^Reading object code for memory address' | tee /tmp/out | tail -5 Reading object code for memory address: 0x479f40 Reading object code for memory address: 0x7f29b7eea80d Reading object code for memory address: 0x7f29b7eea80d Reading object code for memory address: 0x7f29b7eea800 Reading object code for memory address: 0xffffffff813b2f23 [root@jouet ~]# wc -l /tmp/out 40 /tmp/out [root@jouet ~]# For systems that auto-tune below that, the previous patches will tell the user what is happening so that he may either ignore the result of this test or bump /proc/sys/kernel/perf_event_max_sample_rate. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Steven Noonan <steven@uplinklabs.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-6kufyy1iprdfzrbtuqgxir70@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Before: # perf test -v "code reading" 2>&1 | tail -4 perf_evlist__open failed test child finished with -1 ---- end ---- Test object code reading: FAILED! # After: # perf test -v "code reading" 2>&1 | tail -7 perf_evlist__open() failed! Error: Invalid argument. Hint: Check /proc/sys/kernel/perf_event_max_sample_rate. Hint: The current value is 1000 and 4000 is being requested. test child finished with -1 ---- end ---- Test object code reading: FAILED! # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Steven Noonan <steven@uplinklabs.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ifbx7vmrc38loe6317owz2jx@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
When running the "code reading" test we get: # perf test -v "code reading" 2>&1 | tail -5 Parsing event 'cycles:u' perf_evlist__open failed test child finished with -1 ---- end ---- Test object code reading: FAILED! # And with -vv we get the errno value, -22, i.e. -EINVAL, but we can do better and handle the case at hand, with this patch it becomes: # perf test -v "code reading" 2>&1 | tail -7 perf_evlist__open() failed! Error: Invalid argument. Hint: Check /proc/sys/kernel/perf_event_max_sample_rate. Hint: The current value is 1000 and 4000 is being requested. test child finished with -1 ---- end ---- Test object code reading: FAILED! # Next patch will make this 'perf test' entry to use perf_evlist__strerror() Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Steven Noonan <steven@uplinklabs.net> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-i31ai6kfefn75eapejjokfhc@git.kernel.orgSigned-off-by:
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- 18 Feb, 2016 2 commits
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Jiri Olsa authored
Allow user to easily switch all events to user or kernel space with simple --all-user or --all-kernel options. This will be handy within perf mem/c2c wrappers to switch easily monitoring modes. Committer note: Testing it: # perf record --all-kernel --all-user -a sleep 2 Error: option `all-user' cannot be used with all-kernel Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] --all-user Configure all used events to run in user space. --all-kernel Configure all used events to run in kernel space. # perf record --all-user --all-kernel -a sleep 2 Error: option `all-kernel' cannot be used with all-user Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] --all-kernel Configure all used events to run in kernel space. --all-user Configure all used events to run in user space. # perf record --all-user -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.416 MB perf.data (162 samples) ] # perf report | grep '\[k\]' # perf record --all-kernel -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.423 MB perf.data (296 samples) ] # perf report | grep '\[\.\]' # Signed-off-by: -
Arnaldo Carvalho de Melo authored
We were dropping the reference we possibly held but not obtaining one for the new maps, which we will drop at perf_evlist__delete(), fix it. This was caught by Steven Noonan in some of the machines which would produce this output when caught by glibc debug mechanisms: $ sudo perf test 21 21: Test object code reading :*** Error in `perf': corrupted double-linked list: 0x00000000023ffcd0 *** ======= Backtrace: ========= /usr/lib/libc.so.6(+0x72055)[0x7f25be0f3055] /usr/lib/libc.so.6(+0x779b6)[0x7f25be0f89b6] /usr/lib/libc.so.6(+0x7a0ed)[0x7f25be0fb0ed] /usr/lib/libc.so.6(__libc_calloc+0xba)[0x7f25be0fceda] perf(parse_events_lex_init_extra+0x38)[0x4cfff8] perf(parse_events+0x55)[0x4a0615] perf(perf_evlist__config+0xcf)[0x4eeb2f] perf[0x479f82] perf(test__code_reading+0x1e)[0x47ad4e] perf(cmd_test+0x5dd)[0x46452d] perf[0x47f4e3] perf(main+0x603)[0x42c723] /usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7f25be0a1610] perf(_start+0x29)[0x42c859] Further investigation using valgrind led to the reference count imbalance fixed in this patch. Reported-and-Tested-by:
Steven Noonan <steven@uplinklabs.net> Report-Link: http://lkml.kernel.org/r/CAKbGBLjC2Dx5vshxyGmQkcD+VwiAQLbHoXA9i7kvRB2-2opHZQ@mail.gmail.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: Wang Nan <wangnan0@huawei.com> Fixes: f30a79b0 ("perf tools: Add reference counting for cpu_map object") Link: http://lkml.kernel.org/n/tip-j0u1bdhr47sa511sgg76kb8h@git.kernel.orgSigned-off-by:
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- 17 Feb, 2016 12 commits
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Thomas Gleixner authored
No functional change, just less confusing to read. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/20160209201007.921540566@linutronix.deSigned-off-by:
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Ingo Molnar authored
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Thomas Gleixner authored
If CPU_UP_PREPARE is called it is not guaranteed, that a previously allocated and assigned hash has been freed already, but perf_event_init_cpu() unconditionally allocates and assignes a new hash if the swhash is referenced. By overwriting the pointer the existing hash is not longer accessible. Verify that there is no hash assigned on this cpu before allocating and assigning a new one. Signed-off-by:
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Thomas Gleixner authored
If CPU_DOWN_PREPARE fails the perf hotplug notifier is called for CPU_DOWN_FAILED and calls perf_event_init_cpu(), which checks whether the swhash is referenced. If yes it allocates a new hash and stores the pointer in the per cpu data structure. But at this point the cpu is still online, so there must be a valid hash already. By overwriting the pointer the existing hash is not longer accessible. Remove the CPU_DOWN_FAILED state, as there is nothing to (re)allocate. Signed-off-by:
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Thomas Gleixner authored
If CPU_UP_PREPARE fails the perf hotplug code calls perf_event_exit_cpu(), which is a pointless exercise. The cpu is not online, so the smp function calls return -ENXIO. So the result is a list walk to call noops. Remove it. Signed-off-by:
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Borislav Petkov authored
Now that all functionality has been moved to arch/x86/events/, move the perf_event.h header and adjust include paths. Signed-off-by:
Borislav Petkov <bp@suse.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1455098123-11740-18-git-send-email-bp@alien8.deSigned-off-by:
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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