From: Tom Zanussi Date: Sat, 1 May 2010 06:41:20 +0000 (-0500) Subject: perf: add perf-inject builtin X-Git-Tag: v2.6.35-rc1~3^2~129 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=454c407ec17a0c63e4023ac0877d687945a7df4a;p=linux-2.6-block.git perf: add perf-inject builtin Currently, perf 'live mode' writes build-ids at the end of the session, which isn't actually useful for processing live mode events. What would be better would be to have the build-ids sent before any of the samples that reference them, which can be done by processing the event stream and retrieving the build-ids on the first hit. Doing that in perf-record itself, however, is off-limits. This patch introduces perf-inject, which does the same job while leaving perf-record untouched. Normal mode perf still records the build-ids at the end of the session as it should, but for live mode, perf-inject can be injected in between the record and report steps e.g.: perf record -o - ./hackbench 10 | perf inject -v -b | perf report -v -i - perf-inject reads a perf-record event stream and repipes it to stdout. At any point the processing code can inject other events into the event stream - in this case build-ids (-b option) are read and injected as needed into the event stream. Build-ids are just the first user of perf-inject - potentially anything that needs userspace processing to augment the trace stream with additional information could make use of this facility. Cc: Ingo Molnar Cc: Steven Rostedt Cc: Frédéric Weisbecker LKML-Reference: <1272696080-16435-3-git-send-email-tzanussi@gmail.com> Signed-off-by: Tom Zanussi Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/Makefile b/tools/perf/Makefile index c5ac0a991565..0ef5cfe52f2d 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -490,6 +490,7 @@ BUILTIN_OBJS += $(OUTPUT)builtin-kmem.o BUILTIN_OBJS += $(OUTPUT)builtin-lock.o BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o BUILTIN_OBJS += $(OUTPUT)builtin-test.o +BUILTIN_OBJS += $(OUTPUT)builtin-inject.o PERFLIBS = $(LIB_FILE) diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index b57dbcf62af3..ee154b58772b 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -554,7 +554,7 @@ static int __cmd_annotate(void) int ret; struct perf_session *session; - session = perf_session__new(input_name, O_RDONLY, force); + session = perf_session__new(input_name, O_RDONLY, force, false); if (session == NULL) return -ENOMEM; diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c index 7dc3b2e7a5e4..44a47e13bd67 100644 --- a/tools/perf/builtin-buildid-list.c +++ b/tools/perf/builtin-buildid-list.c @@ -39,7 +39,7 @@ static int __cmd_buildid_list(void) int err = -1; struct perf_session *session; - session = perf_session__new(input_name, O_RDONLY, force); + session = perf_session__new(input_name, O_RDONLY, force, false); if (session == NULL) return -1; diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 207e860591e2..4cce68f23686 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -156,8 +156,8 @@ static int __cmd_diff(void) int ret, i; struct perf_session *session[2]; - session[0] = perf_session__new(input_old, O_RDONLY, force); - session[1] = perf_session__new(input_new, O_RDONLY, force); + session[0] = perf_session__new(input_old, O_RDONLY, force, false); + session[1] = perf_session__new(input_new, O_RDONLY, force, false); if (session[0] == NULL || session[1] == NULL) return -ENOMEM; diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c new file mode 100644 index 000000000000..a5902a3eadd3 --- /dev/null +++ b/tools/perf/builtin-inject.c @@ -0,0 +1,228 @@ +/* + * builtin-inject.c + * + * Builtin inject command: Examine the live mode (stdin) event stream + * and repipe it to stdout while optionally injecting additional + * events into it. + */ +#include "builtin.h" + +#include "perf.h" +#include "util/session.h" +#include "util/debug.h" + +#include "util/parse-options.h" + +static char const *input_name = "-"; +static bool inject_build_ids; + +static int event__repipe(event_t *event __used, + struct perf_session *session __used) +{ + uint32_t size; + void *buf = event; + + size = event->header.size; + + while (size) { + int ret = write(STDOUT_FILENO, buf, size); + if (ret < 0) + return -errno; + + size -= ret; + buf += ret; + } + + return 0; +} + +static int event__repipe_mmap(event_t *self, struct perf_session *session) +{ + int err; + + err = event__process_mmap(self, session); + event__repipe(self, session); + + return err; +} + +static int event__repipe_task(event_t *self, struct perf_session *session) +{ + int err; + + err = event__process_task(self, session); + event__repipe(self, session); + + return err; +} + +static int event__repipe_tracing_data(event_t *self, + struct perf_session *session) +{ + int err; + + event__repipe(self, session); + err = event__process_tracing_data(self, session); + + return err; +} + +static int read_buildid(struct map *self, struct perf_session *session) +{ + const char *name = self->dso->long_name; + int err; + + if (filename__read_build_id(self->dso->long_name, self->dso->build_id, + sizeof(self->dso->build_id)) > 0) { + char sbuild_id[BUILD_ID_SIZE * 2 + 1]; + + self->dso->has_build_id = true; + + build_id__sprintf(self->dso->build_id, + sizeof(self->dso->build_id), + sbuild_id); + pr_debug("build id found for %s: %s\n", self->dso->long_name, + sbuild_id); + } + + if (self->dso->has_build_id) { + u16 misc = PERF_RECORD_MISC_USER; + struct machine *machine; + + misc = self->dso->kernel ? PERF_RECORD_MISC_KERNEL : misc; + + machine = perf_session__find_host_machine(session); + if (!machine) { + pr_err("Can't find machine for session\n"); + return -1; + } + + err = event__synthesize_build_id(self->dso, misc, + event__repipe, machine, + session); + if (err) { + pr_err("Can't synthesize build_id event for %s\n", + name); + return -1; + } + } else { + pr_debug("no build_id found for %s\n", name); + return -1; + } + + return 0; +} + +static int event__inject_buildid(event_t *event, struct perf_session *session) +{ + struct addr_location al; + struct thread *thread; + u8 cpumode; + int err = 0; + + cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; + + thread = perf_session__findnew(session, event->ip.pid); + if (thread == NULL) { + pr_err("problem processing %d event, skipping it.\n", + event->header.type); + err = -1; + goto repipe; + } + + thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION, + event->ip.pid, event->ip.ip, &al); + + if (al.map != NULL) { + if (!al.map->dso->hit) { + al.map->dso->hit = 1; + if (map__load(al.map, NULL) >= 0) + read_buildid(al.map, session); + else + pr_warning("no symbols found in %s, maybe " + "install a debug package?\n", + al.map->dso->long_name); + } + } + +repipe: + event__repipe(event, session); + return err; +} + +struct perf_event_ops inject_ops = { + .sample = event__repipe, + .mmap = event__repipe, + .comm = event__repipe, + .fork = event__repipe, + .exit = event__repipe, + .lost = event__repipe, + .read = event__repipe, + .throttle = event__repipe, + .unthrottle = event__repipe, + .attr = event__repipe, + .event_type = event__repipe, + .tracing_data = event__repipe, + .build_id = event__repipe, +}; + +extern volatile int session_done; + +static void sig_handler(int sig __attribute__((__unused__))) +{ + session_done = 1; +} + +static int __cmd_inject(void) +{ + struct perf_session *session; + int ret = -EINVAL; + + signal(SIGINT, sig_handler); + + if (inject_build_ids) { + inject_ops.sample = event__inject_buildid; + inject_ops.mmap = event__repipe_mmap; + inject_ops.fork = event__repipe_task; + inject_ops.tracing_data = event__repipe_tracing_data; + } + + session = perf_session__new(input_name, O_RDONLY, false, true); + if (session == NULL) + return -ENOMEM; + + ret = perf_session__process_events(session, &inject_ops); + + perf_session__delete(session); + + return ret; +} + +static const char * const report_usage[] = { + "perf inject []", + NULL +}; + +static const struct option options[] = { + OPT_BOOLEAN('b', "inject build-ids", &inject_build_ids, + "Inject build-ids into the output stream"), + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show build ids, etc)"), + OPT_END() +}; + +int cmd_inject(int argc, const char **argv, const char *prefix __used) +{ + argc = parse_options(argc, argv, options, report_usage, 0); + + /* + * Any (unrecognized) arguments left? + */ + if (argc) + usage_with_options(report_usage, options); + + if (symbol__init() < 0) + return -1; + + return __cmd_inject(); +} diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index ee05dba9609a..31f60a2535e0 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -492,7 +492,7 @@ static void sort_result(void) static int __cmd_kmem(void) { int err = -EINVAL; - struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0); + struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0, false); if (session == NULL) return -ENOMEM; diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c index ce276750b140..6605000ed73d 100644 --- a/tools/perf/builtin-lock.c +++ b/tools/perf/builtin-lock.c @@ -818,7 +818,7 @@ static struct perf_event_ops eops = { static int read_events(void) { - session = perf_session__new(input_name, O_RDONLY, 0); + session = perf_session__new(input_name, O_RDONLY, 0, false); if (!session) die("Initializing perf session failed\n"); diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 1a7379674c29..e382d93d369c 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -548,7 +548,7 @@ static int __cmd_record(int argc, const char **argv) } session = perf_session__new(output_name, O_WRONLY, - write_mode == WRITE_FORCE); + write_mode == WRITE_FORCE, false); if (session == NULL) { pr_err("Not enough memory for reading perf file header\n"); return -1; diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index f1b46eb7ef9a..0152b5412cc3 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -289,7 +289,7 @@ static int __cmd_report(void) signal(SIGINT, sig_handler); - session = perf_session__new(input_name, O_RDONLY, force); + session = perf_session__new(input_name, O_RDONLY, force, false); if (session == NULL) return -ENOMEM; diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 94453f1e4e01..aef6ed0e119c 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -1660,7 +1660,7 @@ static struct perf_event_ops event_ops = { static int read_events(void) { int err = -EINVAL; - struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0); + struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0, false); if (session == NULL) return -ENOMEM; diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c index c35aa44f82ba..5a52ed9fc10b 100644 --- a/tools/perf/builtin-timechart.c +++ b/tools/perf/builtin-timechart.c @@ -936,7 +936,7 @@ static struct perf_event_ops event_ops = { static int __cmd_timechart(void) { - struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0); + struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0, false); int ret = -EINVAL; if (session == NULL) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index d95281f588d2..3de397764cb3 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1287,7 +1287,7 @@ static int __cmd_top(void) * FIXME: perf_session__new should allow passing a O_MMAP, so that all this * mmap reading, etc is encapsulated in it. Use O_WRONLY for now. */ - struct perf_session *session = perf_session__new(NULL, O_WRONLY, false); + struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false); if (session == NULL) return -ENOMEM; diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 77f556f7604c..9c483e92e8db 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -661,7 +661,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __used) if (!script_name) setup_pager(); - session = perf_session__new(input_name, O_RDONLY, 0); + session = perf_session__new(input_name, O_RDONLY, 0, false); if (session == NULL) return -ENOMEM; diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h index 34a8a9ab9617..921245b28583 100644 --- a/tools/perf/builtin.h +++ b/tools/perf/builtin.h @@ -34,5 +34,6 @@ extern int cmd_kmem(int argc, const char **argv, const char *prefix); extern int cmd_lock(int argc, const char **argv, const char *prefix); extern int cmd_kvm(int argc, const char **argv, const char *prefix); extern int cmd_test(int argc, const char **argv, const char *prefix); +extern int cmd_inject(int argc, const char **argv, const char *prefix); #endif diff --git a/tools/perf/perf.c b/tools/perf/perf.c index 5ff9b5b46970..08e0e5d2b50e 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -309,6 +309,7 @@ static void handle_internal_command(int argc, const char **argv) { "lock", cmd_lock, 0 }, { "kvm", cmd_kvm, 0 }, { "test", cmd_test, 0 }, + { "inject", cmd_inject, 0 }, }; unsigned int i; static const char ext[] = STRIP_EXTENSION; diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 2d1d97e0746d..79da0e50ef8f 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -713,10 +713,18 @@ static int __event_process_build_id(struct build_id_event *bev, dso = __dsos__findnew(head, filename); if (dso != NULL) { + char sbuild_id[BUILD_ID_SIZE * 2 + 1]; + dso__set_build_id(dso, &bev->build_id); - if (filename[0] == '[') - dso->kernel = dso_type; - } + + if (filename[0] == '[') + dso->kernel = dso_type; + + build_id__sprintf(dso->build_id, sizeof(dso->build_id), + sbuild_id); + pr_debug("build id event received for %s: %s\n", + dso->long_name, sbuild_id); + } err = 0; out: @@ -767,7 +775,7 @@ static int perf_file_section__process(struct perf_file_section *self, switch (feat) { case HEADER_TRACE_INFO: - trace_report(fd); + trace_report(fd, false); break; case HEADER_BUILD_ID: @@ -782,12 +790,16 @@ static int perf_file_section__process(struct perf_file_section *self, } static int perf_file_header__read_pipe(struct perf_pipe_file_header *self, - struct perf_header *ph, int fd) + struct perf_header *ph, int fd, + bool repipe) { if (do_read(fd, self, sizeof(*self)) <= 0 || memcmp(&self->magic, __perf_magic, sizeof(self->magic))) return -1; + if (repipe && do_write(STDOUT_FILENO, self, sizeof(*self)) < 0) + return -1; + if (self->size != sizeof(*self)) { u64 size = bswap_64(self->size); @@ -805,7 +817,8 @@ static int perf_header__read_pipe(struct perf_session *session, int fd) struct perf_header *self = &session->header; struct perf_pipe_file_header f_header; - if (perf_file_header__read_pipe(&f_header, self, fd) < 0) { + if (perf_file_header__read_pipe(&f_header, self, fd, + session->repipe) < 0) { pr_debug("incompatible file format\n"); return -EINVAL; } @@ -1096,12 +1109,17 @@ int event__process_tracing_data(event_t *self, lseek(session->fd, offset + sizeof(struct tracing_data_event), SEEK_SET); - size_read = trace_report(session->fd); + size_read = trace_report(session->fd, session->repipe); padding = ALIGN(size_read, sizeof(u64)) - size_read; if (read(session->fd, buf, padding) < 0) die("reading input file"); + if (session->repipe) { + int retw = write(STDOUT_FILENO, buf, padding); + if (retw <= 0 || retw != padding) + die("repiping tracing data padding"); + } if (size_read + padding != size) die("tracing data size mismatch"); @@ -1110,7 +1128,8 @@ int event__process_tracing_data(event_t *self, } int event__synthesize_build_id(struct dso *pos, u16 misc, - event__handler_t process, struct machine *machine, + event__handler_t process, + struct machine *machine, struct perf_session *session) { event_t ev; diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index a8dd73ed1581..5d353e70fe26 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -77,7 +77,7 @@ int perf_session__create_kernel_maps(struct perf_session *self) return ret; } -struct perf_session *perf_session__new(const char *filename, int mode, bool force) +struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) { size_t len = filename ? strlen(filename) + 1 : 0; struct perf_session *self = zalloc(sizeof(*self) + len); @@ -97,6 +97,7 @@ struct perf_session *perf_session__new(const char *filename, int mode, bool forc self->cwdlen = 0; self->unknown_events = 0; self->machines = RB_ROOT; + self->repipe = repipe; self->ordered_samples.flush_limit = ULLONG_MAX; INIT_LIST_HEAD(&self->ordered_samples.samples_head); diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index 61ca92e58ad4..f2b2c6a3a49d 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -34,6 +34,7 @@ struct perf_session { u64 sample_type; int fd; bool fd_pipe; + bool repipe; int cwdlen; char *cwd; struct ordered_samples ordered_samples; @@ -59,7 +60,7 @@ struct perf_event_ops { bool ordered_samples; }; -struct perf_session *perf_session__new(const char *filename, int mode, bool force); +struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe); void perf_session__delete(struct perf_session *self); void perf_event_header__bswap(struct perf_event_header *self); diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c index 44889c9b5630..43f19c1fed3a 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -51,6 +51,7 @@ static int long_size; static unsigned long page_size; static ssize_t calc_data_size; +static bool repipe; static int do_read(int fd, void *buf, int size) { @@ -62,6 +63,13 @@ static int do_read(int fd, void *buf, int size) if (ret <= 0) return -1; + if (repipe) { + int retw = write(STDOUT_FILENO, buf, ret); + + if (retw <= 0 || retw != ret) + die("repiping input file"); + } + size -= ret; buf += ret; } @@ -116,6 +124,13 @@ static char *read_string(void) if (!r) die("no data"); + if (repipe) { + int retw = write(STDOUT_FILENO, &c, 1); + + if (retw <= 0 || retw != r) + die("repiping input file string"); + } + buf[size++] = c; if (!c) @@ -454,7 +469,7 @@ struct record *trace_read_data(int cpu) return data; } -ssize_t trace_report(int fd) +ssize_t trace_report(int fd, bool __repipe) { char buf[BUFSIZ]; char test[] = { 23, 8, 68 }; @@ -465,6 +480,7 @@ ssize_t trace_report(int fd) ssize_t size; calc_data_size = 1; + repipe = __repipe; input_fd = fd; @@ -499,6 +515,7 @@ ssize_t trace_report(int fd) size = calc_data_size - 1; calc_data_size = 0; + repipe = false; if (show_funcs) { print_funcs(); diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h index 1f45d468fd9a..ebfee80e4a07 100644 --- a/tools/perf/util/trace-event.h +++ b/tools/perf/util/trace-event.h @@ -163,7 +163,7 @@ struct record *trace_read_data(int cpu); void parse_set_info(int nr_cpus, int long_sz); -ssize_t trace_report(int fd); +ssize_t trace_report(int fd, bool repipe); void *malloc_or_die(unsigned int size);