- 12 Aug, 2024 36 commits
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Ian Rogers authored
Now all tools are fully initialized prior to use it has no use so remove. Signed-off-by:
Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ilkka Koskinen <ilkka@os.amperecomputing.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Sun Haiyong <sunhaiyong@loongson.cn> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Yanteng Si <siyanteng@loongson.cn> Cc: Yicong Yang <yangyicong@hisilicon.com> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20240812204720.631678-27-irogers@google.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Ensure tool is initialized to avoid lazy initialization pattern so that more uses of struct perf_tool can be made const. Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Use perf_tool__init() so that more uses of 'struct perf_tool' can be const and not relying on perf_tool__fill_defaults(). Signed-off-by:
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Ian Rogers authored
Reduce scope of build_id__mark_dso_hit_ops() to the scope of function perf_session__list_build_ids, its only use, and use perf_tool__init() for the default values. Move perf_event__exit_del_thread() to event.[ch] so it can be used in builtin-buildid-list.c. Signed-off-by:
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Ian Rogers authored
Reduce the scope of the tool from global/static to just that of the cmd_kmem function where the session is scoped. Use the perf_tool__init() to initialize default values. Signed-off-by:
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Ian Rogers authored
Add init function that behaves like perf_tool__fill_defaults() but assumes all values haven't been initialized. Signed-off-by:
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Ian Rogers authored
The aim here is to eventually make perf_tool__fill_defaults() an init function so that the tools struct is more const. Create a tool.c to go along with tool.h. Move perf_tool__fill_defaults() out of session.c into tool.c along with the default stub values. Add perf_tool__compressed_is_stub() for a test in perf_session__process_user_event(). perf_session__process_compressed_event() is only used from being default initialized so migrate into tool.c. Signed-off-by:
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Ian Rogers authored
The tool pointer (to a struct largely of function pointers) is passed around but is unchanged except at initialization. Change parameter and variable types to be const to lower the possibilities of what could happen with a tool. Reviewed-by:
Adrian Hunter <adrian.hunter@intel.com> Signed-off-by:
Leo Yan <leo.yan@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ilkka Koskinen <ilkka@os.amperecomputing.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Sun Haiyong <sunhaiyong@loongson.cn> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Yanteng Si <siyanteng@loongson.cn> Cc: Yicong Yang <yangyicong@hisilicon.com> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20240812204720.631678-4-irogers@google.comSigned-off-by:
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Ian Rogers authored
struct s390_cpumsf_synth was likely cargo culted from other auxtrace examples. It has no users, so remove. Reviewed-by:
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Ian Rogers authored
Add perf_session__deliver_synth_attr_event that synthesizes a perf_record_header_attr event with one id. Remove use of perf_event__synthesize_attr that necessitates the use of the dummy tool in order to pass the session. Reviewed-by:
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Ian Rogers authored
The processing of leader samples would turn an individual sample with a group of read values into multiple samples. 'perf inject' would pass through the additional samples increasing the output data file size: $ perf record -g -e "{instructions,cycles}:S" -o perf.orig.data true $ perf script -D -i perf.orig.data | sed -e 's/perf.orig.data/perf.data/g' > orig.txt $ perf inject -i perf.orig.data -o perf.new.data $ perf script -D -i perf.new.data | sed -e 's/perf.new.data/perf.data/g' > new.txt $ diff -u orig.txt new.txt --- orig.txt 2024-07-29 14:29:40.606576769 -0700 +++ new.txt 2024-07-29 14:30:04.142737434 -0700 ... -0xc550@perf.data [0x30]: event: 3 +0xc550@perf.data [0xd0]: event: 9 +. +. ... raw event: size 208 bytes +. 0000: 09 00 00 00 01 00 d0 00 fc 72 01 86 ff ff ff ff .........r...... +. 0010: 74 7d 2c 00 74 7d 2c 00 fb c3 79 f9 ba d5 05 00 t},.t},...y..... +. 0020: e6 cb 1a 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ +. 0030: 02 00 00 00 00 00 00 00 76 01 00 00 00 00 00 00 ........v....... +. 0040: e6 cb 1a 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ +. 0050: 62 18 00 00 00 00 00 00 f6 cb 1a 00 00 00 00 00 b............... +. 0060: 00 00 00 00 00 00 00 00 0c 00 00 00 00 00 00 00 ................ +. 0070: 80 ff ff ff ff ff ff ff fc 72 01 86 ff ff ff ff .........r...... +. 0080: f3 0e 6e 85 ff ff ff ff 0c cb 7f 85 ff ff ff ff ..n............. +. 0090: bc f2 87 85 ff ff ff ff 44 af 7f 85 ff ff ff ff ........D....... +. 00a0: bd be 7f 85 ff ff ff ff 26 d0 7f 85 ff ff ff ff ........&....... +. 00b0: 6d a4 ff 85 ff ff ff ff ea 00 20 86 ff ff ff ff m......... ..... +. 00c0: 00 fe ff ff ff ff ff ff 57 14 4f 43 fc 7e 00 00 ........W.OC.~.. + +1642373909693435 0xc550 [0xd0]: PERF_RECORD_SAMPLE(IP, 0x1): 2915700/2915700: 0xffffffff860172fc period: 1 addr: 0 +... FP chain: nr:12 +..... 0: ffffffffffffff80 +..... 1: ffffffff860172fc +..... 2: ffffffff856e0ef3 +..... 3: ffffffff857fcb0c +..... 4: ffffffff8587f2bc +..... 5: ffffffff857faf44 +..... 6: ffffffff857fbebd +..... 7: ffffffff857fd026 +..... 8: ffffffff85ffa46d +..... 9: ffffffff862000ea +..... 10: fffffffffffffe00 +..... 11: 00007efc434f1457 +... sample_read: +.... group nr 2 +..... id 00000000001acbe6, value 0000000000000176, lost 0 +..... id 00000000001acbf6, value 0000000000001862, lost 0 + +0xc620@perf.data [0x30]: event: 3 ... This behavior is incorrect as in the case above 'perf inject' should have done nothing. Fix this behavior by disabling separating samples for a tool that requests it. Only request this for `perf inject` so as to not affect other perf tools. With the patch and the test above there are no differences between the orig.txt and new.txt. Fixes: e4caec0d ("perf evsel: Add PERF_SAMPLE_READ sample related processing") Signed-off-by:Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20240729220620.2957754-1-irogers@google.comSigned-off-by:
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Namhyung Kim authored
Now default is to fold everything but it only shows the name of the top-level data type which is not very useful. Instead just expand the top level entry so that it can show the layout at a higher level. Annotate type: 'struct task_struct' (4 samples) Percent Offset Size Field - 100.00 0 9792 struct task_struct { ◆ + 0.50 0 24 struct thread_info thread_info; ▒ 0.00 24 4 unsigned int __state; ▒ 0.00 32 8 void* stack; ▒ + 0.00 40 4 refcount_t usage; ▒ 0.00 44 4 unsigned int flags; ▒ 0.00 48 4 unsigned int ptrace; ▒ 0.00 52 4 int on_cpu; ▒ + 0.00 56 16 struct __call_single_node wake_entry; ▒ 0.00 72 4 unsigned int wakee_flips; ▒ 0.00 80 8 long unsigned int wakee_flip_decay_ts;▒ 0.00 88 8 struct task_struct* last_wakee; ▒ 0.00 96 4 int recent_used_cpu; ▒ 0.00 100 4 int wake_cpu; ▒ 0.00 104 4 int on_rq; ▒ 0.00 108 4 int prio; ▒ 0.00 112 4 int static_prio; ▒ 0.00 116 4 int normal_prio; ▒ 0.00 120 4 unsigned int rt_priority; ▒ + 0.00 128 256 struct sched_entity se; ▒ + 0.00 384 48 struct sched_rt_entity rt; ▒ + 0.00 432 224 struct sched_dl_entity dl; ▒ 0.00 656 8 struct sched_class* sched_class; ▒ ... Committer testing: # perf mem record -a sleep 5s # perf annotate --group --data-type=pthread_mutex_t Annotate type: 'pthread_mutex_t' (13 samples) Percent Offset Size Field - 100.00 0 40 pthread_mutex_t { ▒ - 100.00 0 40 struct __pthread_mutex_s __data { ▒ 39.45 0 4 int __lock; ▒ 0.00 4 4 unsigned int __count; ▒ 7.80 8 4 int __owner; ▒ 6.88 12 4 unsigned int __nusers; ▒ 45.87 16 4 int __kind; ▒ 0.00 20 2 short int __spins; ▒ 0.00 22 2 short int __elision; ▒ + 0.00 24 16 __pthread_list_t __list; ▒ }; ▒ 0.00 0 0 char[] __size; ▒ 39.45 0 8 long int __align; Signed-off-by: -
Namhyung Kim authored
Like 'perf report', use 'e' or 'E' key to toggle folding the current entry so that it can control displaying child entries. Note I didn't add the 'c' and 'C' key to collapse the entry because it's also handled with the 'e'/'E' since it toggles the state. Committer testing: Do some 'perf mem record' for some workload of the whole system, using the target options, as usual (--pid/-p, -C/--cpu, -a for the system wide profiling, etc) and then: # perf annotate --skip-empty --data-type=pthread_mutex_t That, by default, will start as --tui, then press 'E' to see the whole struct unfolded, etc. Signed-off-by:
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Namhyung Kim authored
Like in the hists browser, it should support folding current entry so that it can hide unwanted details in some data structures. The folded entries will be displayed with the '+' sign, while unfolded entries will have the '-' sign. Entries that have no children will not show any signs. Annotate type: 'struct socket' (1 samples) Percent Offset Size Field - 100.00 0 128 struct socket { ◆ 0.00 0 4 socket_state state; ▒ 0.00 4 2 short int type; ▒ 0.00 8 8 long unsigned int flags; ▒ 0.00 16 8 struct file* file; ▒ 100.00 24 8 struct sock* sk; ▒ 0.00 32 8 struct proto_ops* ops; ▒ - 0.00 64 64 struct socket_wq wq { ▒ - 0.00 64 24 wait_queue_head_t wait { ▒ + 0.00 64 4 spinlock_t lock; ▒ - 0.00 72 16 struct list_head head { ▒ 0.00 72 8 struct list_head* next; ▒ 0.00 80 8 struct list_head* prev; ▒ }; ▒ }; ▒ 0.00 88 8 struct fasync_struct* fasync_list; ▒ 0.00 96 8 long unsigned int flags; ▒ + 0.00 104 16 struct callback_head rcu; ▒ }; ▒ }; ▒ This just adds the display logic for folding, actually folding action will be implemented in the next patch. Signed-off-by: -
Ian Rogers authored
Cache home agent (CHA) events were setting the low rather than high config1 bits. SNR was using CLX CHA events, however its CHA is similar to ICX so remove the events. Incorporate the updates in: https://github.com/intel/perfmon/pull/215 https://github.com/intel/perfmon/pull/216 Fixes: 4cc49942 ("perf vendor events: Update cascadelakex events/metrics") Closes: https://lore.kernel.org/linux-perf-users/CAPhsuW4nem9XZP+b=sJJ7kqXG-cafz0djZf51HsgjCiwkGBA+A@mail.gmail.com/Reported-by:
Song Liu <song@kernel.org> Reviewed-by:
Kan Liang <kan.liang@linux.intel.com> Co-authored-by:
Weilin Wang <weilin.wang@intel.com> Signed-off-by:
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Namhyung Kim authored
The bpf_get_stackid() helper returns a signed type to check whether it failed to get a stacktrace or not. But it saved the result in u32 and checked if the value is negative. 376 if (needs_callstack) { 377 pelem->stack_id = bpf_get_stackid(ctx, &stacks, 378 BPF_F_FAST_STACK_CMP | stack_skip); --> 379 if (pelem->stack_id < 0) ./tools/perf/util/bpf_skel/lock_contention.bpf.c:379 contention_begin() warn: unsigned 'pelem->stack_id' is never less than zero. Let's change the type to s32 instead. Fixes: 6d499a6b ("perf lock: Print the number of lost entries for BPF") Reported-by:Dan Carpenter <dan.carpenter@linaro.org> Signed-off-by:
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Namhyung Kim authored
In get_member_overhead(), k is updated when it has a entry in the histogram. But the entry->hists array is allocated with the number of evsel in the group. So the k should be reset when it iterates the event using for_each_group_evsel(), otherwise it'd crash due to a buffer overflow. Fixes: cb1898f5 ("perf annotate-data: Support --skip-empty option") Signed-off-by:
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Leo Yan authored
Current description for the AUX trace buffer size is misleading. When a user specifies the option '-m,512M', it represents a size value in bytes (512MiB) but not 512M pages (512M x 4KiB regard to a page of 4KiB). Make the document clear that the normal buffer and the AUX tracing buffer share the same semantics. Syncs the documents for consistent text. Reviewed-by:
James Clark <james.clark@linaro.org> Signed-off-by:
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Martin Liška authored
Similarly to other subcommands (like report, top), it would be handy to provide a path for addr2line command. Signed-off-by:
Martin Liska <martin.liska@hey.com> Cc: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/eadc3e36-029d-4848-9d69-272fe5a83a26@foxlink.czSigned-off-by:
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Arnaldo Carvalho de Melo authored
Instead of explicitely initializing just the .name and .alias_name, use struct member named initialization of just the non-null -name field, the compiler will initialize all the other non-explicitely initialized fields to NULL. This makes the code more robust, avoiding the error recently fixed when the .alias_name was used and contained a random value. Reviewed-by:
Veronika Molnarova <vmolnaro@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Radostin Stoyanov <rstoyano@redhat.com> Link: https://lore.kernel.org/lkml/e26941f9-f86c-4f2e-b812-20c49fb2c0d3@redhat.comSigned-off-by:
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- 09 Aug, 2024 4 commits
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Namhyung Kim authored
The --skip-empty option is to hide dummy events in a group. Like other output mode in 'perf report' and 'perf annotate', the data-type profiling output should support the option. Committer testing: With dummy: root@number:~# perf annotate --stdio --group --data-type --skip-empty | head -24 Annotate type: 'pthread_mutex_t' in /usr/lib64/libc.so.6 (50 samples): event[0] = cpu_atom/mem-loads,ldlat=30/P event[1] = cpu_atom/mem-stores/P event[2] = dummy:u ============================================================================ Percent offset size field 100.00 100.00 0.00 0 40 pthread_mutex_t { 100.00 100.00 0.00 0 40 struct __pthread_mutex_s __data { 45.21 84.54 0.00 0 4 int __lock; 0.00 0.00 0.00 4 4 unsigned int __count; 0.00 1.83 0.00 8 4 int __owner; 5.19 10.65 0.00 12 4 unsigned int __nusers; 49.61 2.97 0.00 16 4 int __kind; 0.00 0.00 0.00 20 2 short int __spins; 0.00 0.00 0.00 22 2 short int __elision; 0.00 0.00 0.00 24 16 __pthread_list_t __list { 0.00 0.00 0.00 24 8 struct __pthread_internal_list* __prev; 0.00 0.00 0.00 32 8 struct __pthread_internal_list* __next; }; }; 0.00 0.00 0.00 0 0 char[] __size; 45.21 84.54 0.00 0 8 long int __align; }; Skipping it: root@number:~# perf annotate --stdio --group --data-type --skip-empty | head -24 Annotate type: 'pthread_mutex_t' in /usr/lib64/libc.so.6 (50 samples): event[0] = cpu_atom/mem-loads,ldlat=30/P event[1] = cpu_atom/mem-stores/P ============================================================================ Percent offset size field 100.00 100.00 0 40 pthread_mutex_t { 100.00 100.00 0 40 struct __pthread_mutex_s __data { 45.21 84.54 0 4 int __lock; 0.00 0.00 4 4 unsigned int __count; 0.00 1.83 8 4 int __owner; 5.19 10.65 12 4 unsigned int __nusers; 49.61 2.97 16 4 int __kind; 0.00 0.00 20 2 short int __spins; 0.00 0.00 22 2 short int __elision; 0.00 0.00 24 16 __pthread_list_t __list { 0.00 0.00 24 8 struct __pthread_internal_list* __prev; 0.00 0.00 32 8 struct __pthread_internal_list* __next; }; }; 0.00 0.00 0 0 char[] __size; 45.21 84.54 0 8 long int __align; }; Annotate type: 'pthread_mutexattr_t' in /usr/lib64/libc.so.6 (1 samples): root@number:~# Signed-off-by: -
Namhyung Kim authored
When --group option is used, it should display all events together. But the current logic only checks if the first (leader) event has samples or not. Let's check the member events as well. Also it missed to put the linked samples from member evsels to the output RB-tree so that it can be displayed in the output. For example, take a look at this example. $ ./perf evlist cpu/mem-loads,ldlat=30/P cpu/mem-stores/P dummy:u It has three events but 'path_put' function has samples only for mem-stores (second) event. $ sudo ./perf annotate --stdio -f path_put Percent | Source code & Disassembly of kcore for cpu/mem-stores/P (2 samples, percent: local period) ---------------------------------------------------------------------------------------------------------- : 0 0xffffffffae600020 <path_put>: 0.00 : ffffffffae600020: endbr64 0.00 : ffffffffae600024: nopl (%rax, %rax) 91.22 : ffffffffae600029: pushq %rbx 0.00 : ffffffffae60002a: movq %rdi, %rbx 0.00 : ffffffffae60002d: movq 8(%rdi), %rdi 8.78 : ffffffffae600031: callq 0xffffffffae614aa0 0.00 : ffffffffae600036: movq (%rbx), %rdi 0.00 : ffffffffae600039: popq %rbx 0.00 : ffffffffae60003a: jmp 0xffffffffae620670 0.00 : ffffffffae60003f: nop Therefore, it didn't show up when --group option is used since the leader ("mem-loads") event has no samples. But now it checks both events. Before: $ sudo ./perf annotate --stdio -f --group path_put (no output) After: $ sudo ./perf annotate --stdio -f --group path_put Percent | Source code & Disassembly of kcore for cpu/mem-loads,ldlat=30/P, cpu/mem-stores/P, dummy:u (0 samples, percent: local period) ------------------------------------------------------------------------------------------------------------------------------------------------------------- : 0 0xffffffffae600020 <path_put>: 0.00 0.00 0.00 : ffffffffae600020: endbr64 0.00 0.00 0.00 : ffffffffae600024: nopl (%rax, %rax) 0.00 91.22 0.00 : ffffffffae600029: pushq %rbx 0.00 0.00 0.00 : ffffffffae60002a: movq %rdi, %rbx 0.00 0.00 0.00 : ffffffffae60002d: movq 8(%rdi), %rdi 0.00 8.78 0.00 : ffffffffae600031: callq 0xffffffffae614aa0 0.00 0.00 0.00 : ffffffffae600036: movq (%rbx), %rdi 0.00 0.00 0.00 : ffffffffae600039: popq %rbx 0.00 0.00 0.00 : ffffffffae60003a: jmp 0xffffffffae620670 0.00 0.00 0.00 : ffffffffae60003f: nop Committer testing: Before: root@number:~# perf annotate --group --stdio2 clear_page_erms root@number:~# After: root@number:~# perf annotate --group --stdio2 clear_page_erms Samples: 125 of events 'cpu_atom/mem-loads,ldlat=30/P, cpu_atom/mem-stores/P, dummy:u', 4000 Hz, Event count (approx.): 13198416, [percent: local period] clear_page_erms() /proc/kcore Percent 0xffffffff990c6cc0 <clear_page_erms>: endbr64 movl $0x1000,%ecx xorl %eax,%eax 0.00 100.00 0.00 rep stosb %al, (%rdi) ← retq int3 int3 int3 int3 nop nop root@number:~# Reported-by: -
Andi Kleen authored
Create a source symlink to the original source in the objdir. This is similar to what the main kernel build script does. Committer testing: ⬢[acme@toolbox perf-tools-next]$ make O=/tmp/build/$(basename $PWD)/ -C tools/perf install-bin <SNIP> ⬢[acme@toolbox perf-tools-next]$ ls -la /tmp/build/perf-tools-next/source lrwxrwxrwx. 1 acme acme 41 Aug 9 16:26 /tmp/build/perf-tools-next/source -> /home/acme/git/perf-tools-next/tools/perf ⬢[acme@toolbox perf-tools-next]$ Signed-off-by:
Andi Kleen <ak@linux.intel.com> Tested-by:
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Arnaldo Carvalho de Melo authored
In that case we have a set of placeholder functions, one of them uses a 'Dwarf_Addr' type that is not present as it is defined in the missing DWARF libraries, so provide a placeholder typedef for that as well. The build error before this patch: In file included from util/annotate.c:28: util/debuginfo.h:44:46: error: unknown type name ‘Dwarf_Addr’ 44 | Dwarf_Addr *offs __maybe_unused, | ^~~~~~~~~~ make[6]: *** [/home/acme/git/perf-tools-next/tools/build/Makefile.build:106: util/annotate.o] Error 1 make[6]: *** Waiting for unfinished jobs.... Acked-by:
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