- 28 Oct, 2015 9 commits
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Wang Nan authored
This patch utilizes bpf_object__load() provided by libbpf to load all objects into kernel. Committer notes: Testing it: When using an incorrect kernel version number, i.e., having this in your eBPF proggie: int _version __attribute__((section("version"), used)) = 0x40100; For a 4.3.0-rc6+ kernel, say, this happens and needs checking at event parsing time, to provide a better error report to the user: # perf record --event /tmp/foo.o sleep 1 libbpf: load bpf program failed: Invalid argument libbpf: -- BEGIN DUMP LOG --- libbpf: libbpf: -- END LOG -- libbpf: failed to load program 'fork=_do_fork' libbpf: failed to load object '/tmp/foo.o' event syntax error: '/tmp/foo.o' \___ Invalid argument: Are you root and runing a CONFIG_BPF_SYSCALL kernel? (add -v to see detail) Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events If we instead make it match, i.e. use 0x40300 on this v4.3.0-rc6+ kernel, the whole process goes thru: # perf record --event /tmp/foo.o -a usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.202 MB perf.data ] # perf evlist -v /tmp/foo.o: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 # Signed-off-by:Wang Nan <wangnan0@huawei.com> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kaixu Xia <xiakaixu@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1444826502-49291-6-git-send-email-wangnan0@huawei.comSigned-off-by:
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Wang Nan authored
This patch introduces bpf__{un,}probe() functions to enable callers to create kprobe points based on section names a BPF program. It parses the section names in the program and creates corresponding 'struct perf_probe_event' structures. The parse_perf_probe_command() function is used to do the main parsing work. The resuling 'struct perf_probe_event' is stored into program private data for further using. By utilizing the new probing API, this patch creates probe points during event parsing. To ensure probe points be removed correctly, register an atexit hook so even perf quit through exit() bpf__clear() is still called, so probing points are cleared. Note that bpf_clear() should be registered before bpf__probe() is called, so failure of bpf__probe() can still trigger bpf__clear() to remove probe points which are already probed. strerror style error reporting scaffold is created by this patch. bpf__strerror_probe() is the first error reporting function in bpf-loader.c. Committer note: Trying it: To build a test eBPF object file: I am testing using a script I built from the 'perf test -v LLVM' output: $ cat ~/bin/hello-ebpf export KERNEL_INC_OPTIONS="-nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.8.3/include -I/home/acme/git/linux/arch/x86/include -Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -I/home/acme/git/linux/include -Iinclude -I/home/acme/git/linux/arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -Iinclude/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h" export WORKING_DIR=/lib/modules/4.2.0/build export CLANG_SOURCE=- export CLANG_OPTIONS=-xc OBJ=/tmp/foo.o rm -f $OBJ echo '__attribute__((section("fork=do_fork"), used)) int fork(void *ctx) {return 0;} char _license[] __attribute__((section("license"), used)) = "GPL";int _version __attribute__((section("version"), used)) = 0x40100;' | \ clang -D__KERNEL__ $CLANG_OPTIONS $KERNEL_INC_OPTIONS -Wno-unused-value -Wno-pointer-sign -working-directory $WORKING_DIR -c "$CLANG_SOURCE" -target bpf -O2 -o /tmp/foo.o && file $OBJ --- First asking to put a probe in a function not present in the kernel (misses the initial _): $ perf record --event /tmp/foo.o sleep 1 Probe point 'do_fork' not found. event syntax error: '/tmp/foo.o' \___ You need to check probing points in BPF file (add -v to see detail) Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events $ --- Now, with "__attribute__((section("fork=_do_fork"), used)): $ grep _do_fork /proc/kallsyms ffffffff81099ab0 T _do_fork $ perf record --event /tmp/foo.o sleep 1 Failed to open kprobe_events: Permission denied event syntax error: '/tmp/foo.o' \___ Permission denied --- Cool, we need to provide some better hints, "kprobe_events" is too low level, one doesn't strictly need to know the precise details of how these things are put in place, so something that shows the command needed to fix the permissions would be more helpful. Lets try as root instead: # perf record --event /tmp/foo.o sleep 1 Lowering default frequency rate to 1000. Please consider tweaking /proc/sys/kernel/perf_event_max_sample_rate. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.013 MB perf.data ] # perf evlist /tmp/foo.o [root@felicio ~]# perf evlist -v /tmp/foo.o: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 1000, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 --- Signed-off-by: -
Wang Nan authored
By introducing new rules in tools/perf/util/parse-events.[ly], this patch enables 'perf record --event bpf_file.o' to select events by an eBPF object file. It calls parse_events_load_bpf() to load that file, which uses bpf__prepare_load() and finally calls bpf_object__open() for the object files. After applying this patch, commands like: # perf record --event foo.o sleep become possible. However, at this point it is unable to link any useful things onto the evsel list because the creating of probe points and BPF program attaching have not been implemented. Before real events are possible to be extracted, to avoid perf report error because of empty evsel list, this patch link a dummy evsel. The dummy event related code will be removed when probing and extracting code is ready. Commiter notes: Using it: $ ls -la foo.o ls: cannot access foo.o: No such file or directory $ perf record --event foo.o sleep libbpf: failed to open foo.o: No such file or directory event syntax error: 'foo.o' \___ BPF object file 'foo.o' is invalid (add -v to see detail) Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events $ $ file /tmp/build/perf/perf.o /tmp/build/perf/perf.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped $ perf record --event /tmp/build/perf/perf.o sleep libbpf: /tmp/build/perf/perf.o is not an eBPF object file event syntax error: '/tmp/build/perf/perf.o' \___ BPF object file '/tmp/build/perf/perf.o' is invalid (add -v to see detail) Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events $ $ file /tmp/foo.o /tmp/foo.o: ELF 64-bit LSB relocatable, no machine, version 1 (SYSV), not stripped $ perf record --event /tmp/foo.o sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.013 MB perf.data ] $ perf evlist /tmp/foo.o $ perf evlist -v /tmp/foo.o: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 $ So, type 1 is PERF_TYPE_SOFTWARE, config 0x9 is PERF_COUNT_SW_DUMMY, ok. $ perf report --stdio Error: The perf.data file has no samples! # To display the perf.data header info, please use --header/--header-only options. # $ Signed-off-by: -
Wang Nan authored
The 'bpf-loader.[ch]' files are introduced in this patch. Which will be the interface between perf and libbpf. bpf__prepare_load() resides in bpf-loader.c. Following patches will enrich these two files. Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kaixu Xia <xiakaixu@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1444826502-49291-3-git-send-email-wangnan0@huawei.comSigned-off-by:
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Wang Nan authored
By adding libbpf into perf's Makefile, this patch enables perf to build libbpf if libelf is found and neither NO_LIBELF nor NO_LIBBPF is set. The newly introduced code is similar to how libapi and libtraceevent are wired into Makefile.perf. MANIFEST is also updated for 'make perf-*-src-pkg'. Append make_no_libbpf to tools/perf/tests/make. The 'bpf' feature check is appended into default FEATURE_TESTS and FEATURE_DISPLAY, so perf will check the API version of bpf in /path/to/kernel/include/uapi/linux/bpf.h. Which should not fail except when we are trying to port this code to an old kernel. Error messages are also updated to notify users about the lack of BPF support in 'perf record' if libelf is missing or the BPF API check failed. tools/lib/bpf is added to TAG_FOLDERS to allow us to navigate libbpf files when working on perf using tools/perf/tags. Signed-off-by:
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Jiri Olsa authored
Currently we split symbols based on the map comparison, but symbols are stored within dso objects and maps could point into same dso objects (kernel maps). Hence we could end up changing rbtree we are currently iterating and mess it up. It's easily reproduced on s390x by running: $ perf record -a -- sleep 3 $ perf buildid-list -i perf.data --with-hits The fix is to compare dso objects instead. Reported-by:
Michael Petlan <mpetlan@redhat.com> Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20151026135130.GA26003@krava.brq.redhat.comSigned-off-by:
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Wang Nan authored
This patch allows perf record setting event's attr.inherit bit by config terms like: # perf record -e cycles/no-inherit/ ... # perf record -e cycles/inherit/ ... So user can control inherit bit for each event separately. In following example, a.out fork()s in main then do some complex CPU intensive computations in both of its children. Basic result with and without inherit: # perf record -e cycles -e instructions ./a.out [ perf record: Woken up 9 times to write data ] [ perf record: Captured and wrote 2.205 MB perf.data (47920 samples) ] # perf report --stdio # ... # Samples: 23K of event 'cycles' # Event count (approx.): 23641752891 ... # Samples: 24K of event 'instructions' # Event count (approx.): 30428312415 # perf record -i -e cycles -e instructions ./a.out [ perf record: Woken up 5 times to write data ] [ perf record: Captured and wrote 1.111 MB perf.data (24019 samples) ] ... # Samples: 12K of event 'cycles' # Event count (approx.): 11699501775 ... # Samples: 12K of event 'instructions' # Event count (approx.): 15058023559 Cancel inherit for one event when globally enable: # perf record -e cycles/no-inherit/ -e instructions ./a.out [ perf record: Woken up 7 times to write data ] [ perf record: Captured and wrote 1.660 MB perf.data (36004 samples) ] ... # Samples: 12K of event 'cycles/no-inherit/' # Event count (approx.): 11895759282 ... # Samples: 24K of event 'instructions' # Event count (approx.): 30668000441 Enable inherit for one event when globally disable: # perf record -i -e cycles/inherit/ -e instructions ./a.out [ perf record: Woken up 7 times to write data ] [ perf record: Captured and wrote 1.654 MB perf.data (35868 samples) ] ... # Samples: 23K of event 'cycles/inherit/' # Event count (approx.): 23285400229 ... # Samples: 11K of event 'instructions' # Event count (approx.): 14969050259 Committer note: One can check if the bit was set, in addition to seeing the result in the perf.data file size as above by doing one of: # perf record -e cycles -e instructions -a usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.911 MB perf.data (63 samples) ] # perf evlist -v cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|CPU|PERIOD, 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 instructions: size: 112, config: 0x1, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|CPU|PERIOD, read_format: ID, disabled: 1, inherit: 1, freq: 1, sample_id_all: 1, exclude_guest: 1 # So, the inherit bit was set in both, now, if we disable it globally using --no-inherit: # perf record --no-inherit -e cycles -e instructions -a usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.910 MB perf.data (56 samples) ] # perf evlist -v cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|CPU|PERIOD, read_format: ID, disabled: 1, mmap: 1, comm: 1, freq: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1 instructions: size: 112, config: 0x1, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|CPU|PERIOD, read_format: ID, disabled: 1, freq: 1, sample_id_all: 1, exclude_guest: 1 No inherit bit set, then disabling it and setting just on the cycles event: # perf record --no-inherit -e cycles/inherit/ -e instructions -a usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.909 MB perf.data (48 samples) ] # perf evlist -v cycles/inherit/: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|CPU|PERIOD, 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 instructions: size: 112, config: 0x1, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|CPU|PERIOD, read_format: ID, disabled: 1, freq: 1, sample_id_all: 1, exclude_guest: 1 # We can see it as well in by using a more verbose level of debug messages in the tool that sets up the perf_event_attr, 'perf record' in this case: [root@zoo ~]# perf record -vv --no-inherit -e cycles/inherit/ -e instructions -a usleep 1 ------------------------------------------------------------ perf_event_attr: size 112 { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|ID|CPU|PERIOD 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 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 ------------------------------------------------------------ perf_event_attr: size 112 config 0x1 { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|ID|CPU|PERIOD read_format ID disabled 1 freq 1 sample_id_all 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 <SNIP> Signed-off-by: -
Dima Kogan authored
Recent GDB (at least on a vanilla Debian box) looks for debug information in /usr/lib/debug/.build-id/nn/nnnnnnn where nn/nnnnnn is the build-id of the stripped ELF binary. This is documented here: https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html This was not working in perf because we didn't read the build id until AFTER we searched for the separate debug information file. This patch reads the build ID and THEN does the search. Signed-off-by:
Dima Kogan <dima@secretsauce.net> Link: http://lkml.kernel.org/r/87si6pfwz4.fsf@secretsauce.netSigned-off-by:
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Dima Kogan authored
This was benign, but wrong. The build-id should live in a char[], not a char*[] Signed-off-by:
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- 27 Oct, 2015 5 commits
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Arnaldo Carvalho de Melo authored
Recently 'perf <tool> -h' was made aware of arguments and would show just the help for the arguments specified, but that required a strict form, i.e.: $ perf -h --tui worked, but: $ perf -h tui didn't. Make it support both cases and also look at the option help when neither matches, so that he following examples works: $ perf report -h interface Usage: perf report [<options>] --gtk Use the GTK2 interface --stdio Use the stdio interface --tui Use the TUI interface $ perf report -h stack Usage: perf report [<options>] -g, --call-graph <print_type,threshold[,print_limit],order, sort_key[,branch]> Display call graph (stack chain/backtrace): print_type: call graph printing style (graph|flat|fractal|none) threshold: minimum call graph inclusion threshold (<percent>) print_limit: maximum number of call graph entry (<number>) order: call graph order (caller|callee) sort_key: call graph sort key (function|address) branch: include last branch info to call graph (branch) Default: graph,0.5,caller,function --max-stack <n> Set the maximum stack depth when parsing the callchain, anything beyond the specified depth will be ignored. Default: 127 $ Suggested-by:Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Chandler Carruth <chandlerc@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-xzqvamzqv3cv0p6w3inhols3@git.kernel.orgSigned-off-by:
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Jiri Olsa authored
Currently any time we need to access socket or core id for given cpu, we access the sysfs topology file. Adding a cpus_aggr_map cpu_map to cache those entries. Signed-off-by:
Kan Liang <kan.liang@intel.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/1445784728-21732-3-git-send-email-jolsa@kernel.orgSigned-off-by:
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Jiri Olsa authored
Adding cpu_map__empty_new interface to create empty cpumap with given size. The cpumap entries are initialized with -1. It'll be used for caching cpu_map in following patches. Signed-off-by:
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Jiri Olsa authored
Because the 'perf stat record' patches will use the id_offset member together with the priv pointer. Signed-off-by:
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Namhyung Kim authored
Now usage_with_options() setup a pager before printing message so normal printf() or pr_err() will not be shown. The usage_with_options_msg() can be used to print some help message before usage strings. Signed-off-by:
Namhyung Kim <namhyung@kernel.org> Acked-by:
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445701767-12731-4-git-send-email-namhyung@kernel.orgSigned-off-by:
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- 26 Oct, 2015 3 commits
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Namhyung Kim authored
It's annoying to see error or help message when command has many options like in perf record, report or top. So setup pager when print parser error or help message - it should be OK since no UI is enabled at the parsing time. The usage_with_options() already disables it by calling exit_browser() anyway. Signed-off-by:
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Namhyung Kim authored
So that it can be more consistent with other --show-* options. The old name (--showcpuutilization) is provided only for compatibility. Signed-off-by:
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Namhyung Kim authored
Currently if an option name is ambiguous it only prints first two matched option names but no help. It'd be better it could show all possible names and help messages too. Before: $ perf report --show Error: Ambiguous option: show (could be --show-total-period or --show-ref-call-graph) Usage: perf report [<options>] After: $ perf report --show Error: Ambiguous option: show (could be --show-total-period or --show-ref-call-graph) Usage: perf report [<options>] -n, --show-nr-samples Show a column with the number of samples --showcpuutilization Show sample percentage for different cpu modes -I, --show-info Display extended information about perf.data file --show-total-period Show a column with the sum of periods --show-ref-call-graph Show callgraph from reference event Signed-off-by:
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- 25 Oct, 2015 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 from Arnaldo Carvalho de Melo: New user-visible features: - Show ordered command line options when -h is used or when an unknown option is specified. (Arnaldo Carvalho de Melo) - If options are passed after -h, show just its descriptions, not all options. (Arnaldo Carvalho de Melo) Signed-off-by:
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- 24 Oct, 2015 2 commits
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Arnaldo Carvalho de Melo authored
Some tools have a lot of options, so, providing a way to show help just for some of them may come handy: $ perf report -h --tui Usage: perf report [<options>] --tui Use the TUI interface $ perf report -h --tui --showcpuutilization -b -c Usage: perf report [<options>] -b, --branch-stack use branch records for per branch histogram filling -c, --comms <comm[,comm...]> only consider symbols in these comms --showcpuutilization Show sample percentage for different cpu modes --tui Use the TUI interface $ Using it with perf bash completion is also handy, just make sure you source the needed file: $ . ~/git/linux/tools/perf/perf-completion.sh Then press tab/tab after -- to see a list of options, put them after -h and only the options chosen will have its help presented: $ perf report -h -- --asm-raw --demangle-kernel --group --kallsyms --pretty --stdio --branch-history --disassembler-style --gtk --max-stack --showcpuutilization --symbol-filter --branch-stack --dsos --header --mem-mode --show-info --symbols --call-graph --dump-raw-trace --header-only --modules --show-nr-samples --symfs --children --exclude-other --hide-unresolved --objdump --show-ref-call-graph --threads --column-widths --fields --ignore-callees --parent --show-total-period --tid --comms --field-separator --input --percentage --socket-filter --tui --cpu --force --inverted --percent-limit --sort --verbose --demangle --full-source-path --itrace --pid --source --vmlinux $ perf report -h --socket-filter Usage: perf report [<options>] --socket-filter <n> only show processor socket that match with this filter Suggested-by: -
Arnaldo Carvalho de Melo authored
When asking for a listing of the options, be it using -h or when an unknown option is passed, order it by one-letter options, then the ones having just long names. Suggested-by:
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- 23 Oct, 2015 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: - The default for callchains is back to 'callee' when --children is not used. (Namhyung Kim) - Move the 'use_offset' option to the right place where the annotate code expects it to be to be able to properly handle it. (Namhyung Kim) - Don't die when an unknown 'annotate' option is found in the perf config file (usually ~/.perfconfig), just warn the user. (Arnaldo Carvalho de Melo) Infrastructure changes: - Support %ps/%pS in libtraceevent. (Scott Wood) Signed-off-by:
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- 22 Oct, 2015 9 commits
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Arnaldo Carvalho de Melo authored
The perf_config() infrastructure we inherited from git calls die() when the provided config callback returns -1, meaning some key in a config section is unexpected, that seems ok for a stdio based tool, but in --tui we end up messing up the output, so just tell the user about the error, wait for a keystroke and return 0, being more resilient and proceeding with what we managed to parse. That die() needs to die, tho :-) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-pqtsffh2kwr5mwm4qg9kgotu@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
I.e. we want to tell the user about errors found during, for instance, the ui_browser initialization, so that a call to ui__warning() appears as a window waiting for a key to be pressed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ederrwizcl6mfz10vfobl5qq@git.kernel.orgSigned-off-by:
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Namhyung Kim authored
The annotate__configs should be sorted so that it can use bsearch(3). However commit 0c4a5bce ("perf annotate: Display total number of samples with --show-total-period") added a new config item at the end. This resulted in the 'annotate.use_offset' config variable cannot be found and perf terminated like below: $ perf report bad config file line 6 in ~/.perfconfig Signed-off-by:
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Namhyung Kim authored
The --call-graph option is complex so we should provide better guide for users. Also change help message to be consistent with config option names. Now perf top will show help like below: $ perf top --call-graph Error: option `call-graph' requires a value Usage: perf top [<options>] --call-graph <record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]> setup and enables call-graph (stack chain/backtrace): record_mode: call graph recording mode (fp|dwarf|lbr) record_size: if record_mode is 'dwarf', max size of stack recording (<bytes>) default: 8192 (bytes) print_type: call graph printing style (graph|flat|fractal|none) threshold: minimum call graph inclusion threshold (<percent>) print_limit: maximum number of call graph entry (<number>) order: call graph order (caller|callee) sort_key: call graph sort key (function|address) branch: include last branch info to call graph (branch) Default: fp,graph,0.5,caller,function Requested-by:Frederic Weisbecker <fweisbec@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Chandler Carruth <chandlerc@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1445524112-5201-2-git-send-email-namhyung@kernel.orgSigned-off-by:
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Namhyung Kim authored
The caller callchain order is useful with --children option since it can show 'overview' style output, but other commands which don't use --children feature like 'perf script' or even 'perf report/top' without --children are better to keep callee order. Signed-off-by:
Brendan Gregg <brendan.d.gregg@gmail.com> Acked-by:
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Namhyung Kim authored
Currently 'perf top --call-graph' option is same as 'perf record'. But 'perf top' also need to receive display options in 'perf report'. To do that, change parse_callchain_report_opt() to allow record options too. Now perf top can receive display options like below: $ perf top --call-graph Error: option `call-graph' requires a value Usage: perf top [<options>] --call-graph <mode[,dump_size],output_type,min_percent[,print_limit],call_order[,branch]> setup and enables call-graph (stack chain/backtrace) recording: fp dwarf lbr, output_type (graph, flat, fractal, or none), min percent threshold, optional print limit, callchain order, key (function or address), add branches $ perf top --call-graph callee,graph,fp Signed-off-by: -
Namhyung Kim authored
These messages will be used by 'perf top' in the next patch. Signed-off-by:
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Scott Wood authored
Commits such as 65dd297a ("xfs: %pF is only for function pointers") caused a regression because pretty_print() didn't support %ps/%pS. The current %pf/%pF implementation in pretty_print() is what %ps/%pS is supposed to do, so use the same code for %ps/%pS. Addressing the incorrect %pf/%pF implementation is beyond the scope of this patch. Signed-off-by:
Scott Wood <scottwood@freescale.com> Acked-by:
Steven Rostedt <rostedt@goodmis.org> Cc: Dave Chinner <david@fromorbit.com> Link: http://lkml.kernel.org/r/20150831211637.GA12848@home.buserror.netSigned-off-by:
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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: - Print branch filter state in verbose mode. (Andi Kleen) - Fix core dump caused by per-socket/core system-wide stat. (Kan Liang) - Update libtraceevent KVM plugin. (Paolo Bonzini) Infrastructure changes: - Add fixdep to 'tools/build' .gitignore. (Yunlong Song) Signed-off-by:
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- 21 Oct, 2015 2 commits
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Arnaldo Carvalho de Melo authored
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-q0lde9ajs84oi38nlyjcqbwg@git.kernel.orgSigned-off-by:
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Andi Kleen authored
Add a missing field to the perf_event_attr debug output. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Acked-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/1445366797-30894-4-git-send-email-andi@firstfloor.org [ Print it between config2 and sample_regs_user (peterz)] Signed-off-by:
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- 20 Oct, 2015 8 commits
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Kan Liang authored
Perf will core dump if --per-socket/core -a are applied for perf stat. The root cause is that cpu_map__build_map set refcnt of evlist's cpu_map to 1. It should set refcnt for the newly created cpu_map, not evlist's cpu_map. Here is the example: # perf stat -e cycles --per-socket -a sleep 1 Performance counter stats for 'system wide': S0 36 30,196,257 cycles S1 28 15,823,536 cycles 1.001126828 seconds time elapsed *** Error in `./perf': corrupted double-linked list: 0x00000000021f9090 *** ======= Backtrace: ========= /lib64/libc.so.6[0x3002e7bbe7] /lib64/libc.so.6[0x3002e7d2b5] ./perf(perf_evsel__delete+0x28)[0x485bdd] ./perf[0x4800e8] ./perf(perf_evlist__delete+0x5e)[0x482cd5] ./perf(cmd_stat+0xf25)[0x432328] ./perf[0x4768e0] ./perf[0x476ad6] ./perf[0x476b41] ./perf(main+0x1d0)[0x476db2] /lib64/libc.so.6(__libc_start_main+0xf5)[0x3002e21b45] ./perf[0x4202c5] Signed-off-by: -
Paolo Bonzini authored
The format of the role word has changed through the years and the plugin was never updated; some VMX exit reasons were missing too. Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Acked-by:
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Yunlong Song authored
Commit 7c422f55 ("tools build: Build fixdep helper from perf and basic libs") dynamically creates fixdep during the perf building. Add it to .gitignore. Signed-off-by:
Yunlong Song <yunlong.song@huawei.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@intel.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 7c422f55 ("tools build: Build fixdep helper from perf and basic libs") Link: http://lkml.kernel.org/r/1444899116-8220-1-git-send-email-yunlong.song@huawei.comSigned-off-by:
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Stephane Eranian authored
This patch add a new branch type sampling filter to perf record. It is named 'call' and maps to PERF_SAMPLE_BRANCH_CALL. It samples direct call branches only, unlike 'any_call' which includes indirect calls as well. $ perf record -j call -e cycles ..... The man page is updated accordingly. Signed-off-by:
Stephane Eranian <eranian@google.com> Signed-off-by:
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Stephane Eranian authored
The patch catches PERF_SAMPLE_BRANCH_CALL because it is not clear whether this is actually supported by the hardware. Signed-off-by:
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Stephane Eranian authored
This patch enables the suport for the PERF_SAMPLE_BRANCH_CALL for Intel x86 processors. When the processor support LBR filtering this the selection is done in hardware. Otherwise, the filter is applied by software. Note that we chose to include zero length calls because they also represent calls. Signed-off-by:
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Stephane Eranian authored
Add a new branch sample type to cover only call branches (function calls). The current ANY_CALL included direct, indirect calls and far jumps. We want to be able to differentiate indirect from direct calls. Therefore we introduce PERF_SAMPLE_BRANCH_CALL. The implementation is up to each architecture. Signed-off-by:
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Adrian Hunter authored
Commit: b20112ed ("perf/x86: Improve accuracy of perf/sched clock") allowed the time_shift value in perf_event_mmap_page to be as much as 32. Unfortunately the documented algorithms for using time_shift have it shifting an integer, whereas to work correctly with the value 32, the type must be u64. In the case of perf tools, Intel PT decodes correctly but the timestamps that are output (for example by perf script) have lost 32-bits of granularity so they look like they are not changing at all. Fix by limiting the shift to 31 and adjusting the multiplier accordingly. Also update the documentation of perf_event_mmap_page so that new code based on it will be more future-proof. Signed-off-by:
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