d0713d4ca3
This adds a feature to export perf data to JSON.
The resolved symbols are exported into the JSON so that external tools
don't need to load the dsos themselves (or even have access to them at
all.) This makes it easy to load and analyze perf data with standalone
tools where direct perf or libbabeltrace integration is impractical.
The exporter uses a minimal inline JSON encoding without any external
dependencies. Currently it only outputs some headers and sample metadata
but it's easily extensible.
Use it like this:
$ perf data convert --to-json out.json
Committer notes:
Fixup a __printf() bug that broke the build:
util/data-convert-json.c:103:11: error: expected ‘)’ before numeric constant
103 | __(printf, 5, 6)
| ^~
| )
util/data-convert-json.c: In function ‘output_sample_callchain_entry’:
util/data-convert-json.c:124:2: error: implicit declaration of function ‘output_json_key_format’; did you mean ‘output_json_format’? [-Werror=implicit-function-declaration]
124 | output_json_key_format(out, false, 5, "ip", "\"0x%" PRIx64 "\"", ip);
| ^~~~~~~~~~~~~~~~~~~~~~
| output_json_format
Also had to add this patch to fix errors reported by various versions of
clang:
- if (al && al->sym && al->sym->name && strlen(al->sym->name) > 0) {
+ if (al && al->sym && al->sym->namelen) {
al->sym->name is a zero sized array, to avoid one extra alloc in the
symbol__new() constructor, sym->namelen carries its strlen.
Committer testing:
$ ls -la out.json
ls: cannot access 'out.json': No such file or directory
$ perf record sleep 0.1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.001 MB perf.data (8 samples) ]
$ perf report --stats | grep -w SAMPLE
SAMPLE events: 8
$ perf data convert --to-json out.json
[ perf data convert: Converted 'perf.data' into JSON data 'out.json' ]
[ perf data convert: Converted and wrote 0.002 MB (8 samples) ]
$ ls -la out.json
-rw-rw-r--. 1 acme acme 2017 Apr 26 17:29 out.json
$ cat out.json
{
"linux-perf-json-version": 1,
"headers": {
"header-version": 1,
"captured-on": "2021-04-26T20:28:57Z",
"data-offset": 432,
"data-size": 1016,
"feat-offset": 1448,
"hostname": "five",
"os-release": "5.11.14-200.fc33.x86_64",
"arch": "x86_64",
"cpu-desc": "AMD Ryzen 9 3900X 12-Core Processor",
"cpuid": "AuthenticAMD,23,113,0",
"nrcpus-online": 24,
"nrcpus-avail": 24,
"perf-version": "5.12.gee134f3189bd",
"cmdline": [
"/home/acme/bin/perf",
"record",
"sleep",
"0.1"
]
},
"samples": [
{
"timestamp": 170517539043684,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6268827"
}
]
},
{
"timestamp": 170517539048443,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa661359d"
}
]
},
{
"timestamp": 170517539051018,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6311e18"
}
]
},
{
"timestamp": 170517539053652,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb77b4812b",
"symbol": "_dl_start",
"dso": "ld-2.32.so"
}
]
},
{
"timestamp": 170517539055306,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6269286"
}
]
},
{
"timestamp": 170517539057590,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa62abd8b"
}
]
},
{
"timestamp": 170517539067559,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb77b5e9e9",
"symbol": "__GI___tunables_init",
"dso": "ld-2.32.so"
}
]
},
{
"timestamp": 170517539282452,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb779978d2",
"symbol": "getenv",
"dso": "libc-2.32.so"
}
]
}
]
}
$
Signed-off-by: Nicholas Fraser <nfraser@codeweavers.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tan Xiaojun <tanxiaojun@huawei.com>
Cc: Ulrich Czekalla <uczekalla@codeweavers.com>
Link: http://lore.kernel.org/lkml/3884969f-804d-2f53-c648-e2b0bd85edff@codeweavers.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
305 lines
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305 lines
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perf-y += annotate.o
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perf-y += block-info.o
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perf-y += block-range.o
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perf-y += build-id.o
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perf-y += cacheline.o
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perf-y += config.o
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perf-y += copyfile.o
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perf-y += ctype.o
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perf-y += db-export.o
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perf-y += env.o
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perf-y += event.o
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perf-y += evlist.o
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perf-y += sideband_evlist.o
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perf-y += evsel.o
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perf-y += evsel_fprintf.o
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perf-y += perf_event_attr_fprintf.o
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perf-y += evswitch.o
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perf-y += find_bit.o
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perf-y += get_current_dir_name.o
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perf-y += kallsyms.o
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perf-y += levenshtein.o
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perf-y += llvm-utils.o
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perf-y += mmap.o
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perf-y += memswap.o
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perf-y += parse-events.o
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perf-y += perf_regs.o
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perf-y += path.o
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perf-y += print_binary.o
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perf-y += rlimit.o
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perf-y += argv_split.o
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perf-y += rbtree.o
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perf-y += libstring.o
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perf-y += bitmap.o
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perf-y += hweight.o
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perf-y += smt.o
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perf-y += strbuf.o
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perf-y += string.o
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perf-y += strlist.o
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perf-y += strfilter.o
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perf-y += top.o
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perf-y += usage.o
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perf-y += dso.o
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perf-y += dsos.o
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perf-y += symbol.o
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perf-y += symbol_fprintf.o
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perf-y += color.o
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perf-y += color_config.o
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perf-y += metricgroup.o
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perf-y += header.o
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perf-y += callchain.o
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perf-y += values.o
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perf-y += debug.o
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perf-y += fncache.o
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perf-y += machine.o
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perf-y += map.o
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perf-y += pstack.o
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perf-y += session.o
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perf-y += sample-raw.o
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perf-y += s390-sample-raw.o
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perf-$(CONFIG_TRACE) += syscalltbl.o
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perf-y += ordered-events.o
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perf-y += namespaces.o
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perf-y += comm.o
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perf-y += thread.o
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perf-y += thread_map.o
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perf-y += trace-event-parse.o
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perf-y += parse-events-flex.o
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perf-y += parse-events-bison.o
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perf-y += pmu.o
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perf-y += pmu-flex.o
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perf-y += pmu-bison.o
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perf-y += trace-event-read.o
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perf-y += trace-event-info.o
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perf-y += trace-event-scripting.o
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perf-y += trace-event.o
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perf-y += svghelper.o
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perf-y += sort.o
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perf-y += hist.o
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perf-y += util.o
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perf-y += cpumap.o
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perf-y += affinity.o
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perf-y += cputopo.o
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perf-y += cgroup.o
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perf-y += target.o
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perf-y += rblist.o
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perf-y += intlist.o
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perf-y += vdso.o
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perf-y += counts.o
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perf-y += stat.o
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perf-y += stat-shadow.o
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perf-y += stat-display.o
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perf-y += perf_api_probe.o
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perf-y += record.o
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perf-y += srcline.o
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perf-y += srccode.o
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perf-y += synthetic-events.o
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perf-y += data.o
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perf-y += tsc.o
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perf-y += cloexec.o
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perf-y += call-path.o
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perf-y += rwsem.o
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perf-y += thread-stack.o
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perf-y += spark.o
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perf-y += topdown.o
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perf-y += iostat.o
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perf-y += stream.o
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perf-$(CONFIG_AUXTRACE) += auxtrace.o
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perf-$(CONFIG_AUXTRACE) += intel-pt-decoder/
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perf-$(CONFIG_AUXTRACE) += intel-pt.o
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perf-$(CONFIG_AUXTRACE) += intel-bts.o
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perf-$(CONFIG_AUXTRACE) += arm-spe.o
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perf-$(CONFIG_AUXTRACE) += arm-spe-decoder/
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perf-$(CONFIG_AUXTRACE) += s390-cpumsf.o
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ifdef CONFIG_LIBOPENCSD
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perf-$(CONFIG_AUXTRACE) += cs-etm.o
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perf-$(CONFIG_AUXTRACE) += cs-etm-decoder/
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endif
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perf-y += parse-branch-options.o
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perf-y += dump-insn.o
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perf-y += parse-regs-options.o
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perf-y += parse-sublevel-options.o
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perf-y += term.o
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perf-y += help-unknown-cmd.o
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perf-y += mem-events.o
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perf-y += vsprintf.o
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perf-y += units.o
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perf-y += time-utils.o
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perf-y += expr-flex.o
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perf-y += expr-bison.o
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perf-y += expr.o
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perf-y += branch.o
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perf-y += mem2node.o
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perf-y += clockid.o
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perf-$(CONFIG_LIBBPF) += bpf-loader.o
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perf-$(CONFIG_LIBBPF) += bpf_map.o
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perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o
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perf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
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perf-$(CONFIG_LIBELF) += symbol-elf.o
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perf-$(CONFIG_LIBELF) += probe-file.o
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perf-$(CONFIG_LIBELF) += probe-event.o
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ifndef CONFIG_LIBBPF
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perf-y += hashmap.o
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endif
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ifndef CONFIG_LIBELF
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perf-y += symbol-minimal.o
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endif
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ifndef CONFIG_SETNS
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perf-y += setns.o
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endif
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perf-$(CONFIG_DWARF) += probe-finder.o
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perf-$(CONFIG_DWARF) += dwarf-aux.o
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perf-$(CONFIG_DWARF) += dwarf-regs.o
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perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
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perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind-local.o
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perf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
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perf-$(CONFIG_LIBUNWIND_X86) += libunwind/x86_32.o
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perf-$(CONFIG_LIBUNWIND_AARCH64) += libunwind/arm64.o
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perf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
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perf-y += data-convert-json.o
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perf-y += scripting-engines/
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perf-$(CONFIG_ZLIB) += zlib.o
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perf-$(CONFIG_LZMA) += lzma.o
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perf-$(CONFIG_ZSTD) += zstd.o
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perf-$(CONFIG_LIBCAP) += cap.o
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perf-y += demangle-ocaml.o
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perf-y += demangle-java.o
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perf-y += demangle-rust.o
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ifdef CONFIG_JITDUMP
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perf-$(CONFIG_LIBELF) += jitdump.o
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perf-$(CONFIG_LIBELF) += genelf.o
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perf-$(CONFIG_DWARF) += genelf_debug.o
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endif
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perf-y += perf-hooks.o
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perf-$(CONFIG_LIBBPF) += bpf-event.o
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perf-$(CONFIG_CXX) += c++/
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perf-$(CONFIG_LIBPFM4) += pfm.o
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CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_llvm-utils.o += -DPERF_INCLUDE_DIR="BUILD_STR($(perf_include_dir_SQ))"
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# avoid compiler warnings in 32-bit mode
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CFLAGS_genelf_debug.o += -Wno-packed
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$(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-flex.h: util/parse-events.l $(OUTPUT)util/parse-events-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/parse-events-flex.c \
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--header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) $<
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$(OUTPUT)util/parse-events-bison.c $(OUTPUT)util/parse-events-bison.h: util/parse-events.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) \
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-o $(OUTPUT)util/parse-events-bison.c -p parse_events_
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$(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-flex.h: util/expr.l $(OUTPUT)util/expr-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/expr-flex.c \
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--header-file=$(OUTPUT)util/expr-flex.h $(PARSER_DEBUG_FLEX) $<
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$(OUTPUT)util/expr-bison.c $(OUTPUT)util/expr-bison.h: util/expr.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) \
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-o $(OUTPUT)util/expr-bison.c -p expr_
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$(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-flex.h: util/pmu.l $(OUTPUT)util/pmu-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/pmu-flex.c \
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--header-file=$(OUTPUT)util/pmu-flex.h $(PARSER_DEBUG_FLEX) $<
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$(OUTPUT)util/pmu-bison.c $(OUTPUT)util/pmu-bison.h: util/pmu.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) \
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-o $(OUTPUT)util/pmu-bison.c -p perf_pmu_
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FLEX_GE_26 := $(shell expr $(shell $(FLEX) --version | sed -e 's/flex \([0-9]\+\).\([0-9]\+\)/\1\2/g') \>\= 26)
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ifeq ($(FLEX_GE_26),1)
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flex_flags := -Wno-switch-enum -Wno-switch-default -Wno-unused-function -Wno-redundant-decls -Wno-sign-compare -Wno-unused-parameter -Wno-missing-prototypes -Wno-missing-declarations
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CC_HASNT_MISLEADING_INDENTATION := $(shell echo "int main(void) { return 0 }" | $(CC) -Werror -Wno-misleading-indentation -o /dev/null -xc - 2>&1 | grep -q -- -Wno-misleading-indentation ; echo $$?)
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ifeq ($(CC_HASNT_MISLEADING_INDENTATION), 1)
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flex_flags += -Wno-misleading-indentation
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endif
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else
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flex_flags := -w
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endif
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CFLAGS_parse-events-flex.o += $(flex_flags)
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CFLAGS_pmu-flex.o += $(flex_flags)
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CFLAGS_expr-flex.o += $(flex_flags)
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bison_flags := -DYYENABLE_NLS=0
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BISON_GE_35 := $(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\)/\1\2/g') \>\= 35)
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ifeq ($(BISON_GE_35),1)
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bison_flags += -Wno-unused-parameter -Wno-nested-externs -Wno-implicit-function-declaration -Wno-switch-enum
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else
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bison_flags += -w
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endif
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CFLAGS_parse-events-bison.o += $(bison_flags)
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CFLAGS_pmu-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)
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CFLAGS_expr-bison.o += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)
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$(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c
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$(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
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$(OUTPUT)util/expr.o: $(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-bison.c
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CFLAGS_bitmap.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_find_bit.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_rbtree.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_libstring.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_hweight.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_parse-events.o += -Wno-redundant-decls
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CFLAGS_expr.o += -Wno-redundant-decls
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CFLAGS_header.o += -include $(OUTPUT)PERF-VERSION-FILE
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$(OUTPUT)util/kallsyms.o: ../lib/symbol/kallsyms.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/argv_split.o: ../lib/argv_split.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/bitmap.o: ../lib/bitmap.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/ctype.o: ../lib/ctype.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/find_bit.o: ../lib/find_bit.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/rbtree.o: ../lib/rbtree.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/libstring.o: ../lib/string.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/vsprintf.o: ../lib/vsprintf.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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