mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 00:57:33 +07:00
330aa675b4
This patch adds a new feature bit, namely, HEADER_BRANCH_STACK. When present, it indicates that sample records may contain branch stack. This could be useful to a viewer to switch to branch mode without having to parse all the samples or without a specific cmdline option. This will be used in a subsequent patch to enhance perf report with branch stacks. Signed-off-by: Stephane Eranian <eranian@google.com> Cc: peterz@infradead.org Cc: acme@redhat.com Cc: asharma@fb.com Cc: ravitillo@lbl.gov Cc: vweaver1@eecs.utk.edu Cc: khandual@linux.vnet.ibm.com Cc: dsahern@gmail.com Link: http://lkml.kernel.org/r/1331246868-19905-3-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
929 lines
25 KiB
C
929 lines
25 KiB
C
/*
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* builtin-record.c
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*
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* Builtin record command: Record the profile of a workload
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* (or a CPU, or a PID) into the perf.data output file - for
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* later analysis via perf report.
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*/
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#define _FILE_OFFSET_BITS 64
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#include "builtin.h"
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#include "perf.h"
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#include "util/build-id.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/header.h"
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#include "util/event.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/debug.h"
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#include "util/session.h"
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#include "util/tool.h"
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#include "util/symbol.h"
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#include "util/cpumap.h"
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#include "util/thread_map.h"
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#include <unistd.h>
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#include <sched.h>
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#include <sys/mman.h>
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enum write_mode_t {
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WRITE_FORCE,
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WRITE_APPEND
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};
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struct perf_record {
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struct perf_tool tool;
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struct perf_record_opts opts;
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u64 bytes_written;
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const char *output_name;
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struct perf_evlist *evlist;
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struct perf_session *session;
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const char *progname;
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const char *uid_str;
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int output;
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unsigned int page_size;
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int realtime_prio;
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enum write_mode_t write_mode;
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bool no_buildid;
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bool no_buildid_cache;
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bool force;
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bool file_new;
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bool append_file;
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long samples;
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off_t post_processing_offset;
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};
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static void advance_output(struct perf_record *rec, size_t size)
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{
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rec->bytes_written += size;
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}
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static void write_output(struct perf_record *rec, void *buf, size_t size)
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{
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while (size) {
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int ret = write(rec->output, buf, size);
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if (ret < 0)
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die("failed to write");
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size -= ret;
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buf += ret;
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rec->bytes_written += ret;
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}
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}
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static int process_synthesized_event(struct perf_tool *tool,
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union perf_event *event,
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struct perf_sample *sample __used,
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struct machine *machine __used)
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{
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struct perf_record *rec = container_of(tool, struct perf_record, tool);
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write_output(rec, event, event->header.size);
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return 0;
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}
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static void perf_record__mmap_read(struct perf_record *rec,
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struct perf_mmap *md)
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{
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unsigned int head = perf_mmap__read_head(md);
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unsigned int old = md->prev;
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unsigned char *data = md->base + rec->page_size;
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unsigned long size;
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void *buf;
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if (old == head)
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return;
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rec->samples++;
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size = head - old;
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if ((old & md->mask) + size != (head & md->mask)) {
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buf = &data[old & md->mask];
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size = md->mask + 1 - (old & md->mask);
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old += size;
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write_output(rec, buf, size);
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}
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buf = &data[old & md->mask];
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size = head - old;
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old += size;
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write_output(rec, buf, size);
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md->prev = old;
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perf_mmap__write_tail(md, old);
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}
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static volatile int done = 0;
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static volatile int signr = -1;
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static volatile int child_finished = 0;
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static void sig_handler(int sig)
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{
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if (sig == SIGCHLD)
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child_finished = 1;
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done = 1;
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signr = sig;
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}
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static void perf_record__sig_exit(int exit_status __used, void *arg)
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{
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struct perf_record *rec = arg;
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int status;
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if (rec->evlist->workload.pid > 0) {
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if (!child_finished)
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kill(rec->evlist->workload.pid, SIGTERM);
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wait(&status);
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if (WIFSIGNALED(status))
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psignal(WTERMSIG(status), rec->progname);
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}
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if (signr == -1 || signr == SIGUSR1)
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return;
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signal(signr, SIG_DFL);
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kill(getpid(), signr);
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}
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static bool perf_evlist__equal(struct perf_evlist *evlist,
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struct perf_evlist *other)
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{
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struct perf_evsel *pos, *pair;
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if (evlist->nr_entries != other->nr_entries)
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return false;
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pair = list_entry(other->entries.next, struct perf_evsel, node);
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list_for_each_entry(pos, &evlist->entries, node) {
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if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0))
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return false;
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pair = list_entry(pair->node.next, struct perf_evsel, node);
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}
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return true;
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}
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static void perf_record__open(struct perf_record *rec)
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{
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struct perf_evsel *pos, *first;
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struct perf_evlist *evlist = rec->evlist;
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struct perf_session *session = rec->session;
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struct perf_record_opts *opts = &rec->opts;
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first = list_entry(evlist->entries.next, struct perf_evsel, node);
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perf_evlist__config_attrs(evlist, opts);
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list_for_each_entry(pos, &evlist->entries, node) {
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struct perf_event_attr *attr = &pos->attr;
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struct xyarray *group_fd = NULL;
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/*
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* Check if parse_single_tracepoint_event has already asked for
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* PERF_SAMPLE_TIME.
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*
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* XXX this is kludgy but short term fix for problems introduced by
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* eac23d1c that broke 'perf script' by having different sample_types
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* when using multiple tracepoint events when we use a perf binary
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* that tries to use sample_id_all on an older kernel.
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*
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* We need to move counter creation to perf_session, support
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* different sample_types, etc.
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*/
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bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
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if (opts->group && pos != first)
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group_fd = first->fd;
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fallback_missing_features:
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if (opts->exclude_guest_missing)
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attr->exclude_guest = attr->exclude_host = 0;
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retry_sample_id:
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attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
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try_again:
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if (perf_evsel__open(pos, evlist->cpus, evlist->threads,
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opts->group, group_fd) < 0) {
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int err = errno;
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if (err == EPERM || err == EACCES) {
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ui__error_paranoid();
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exit(EXIT_FAILURE);
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} else if (err == ENODEV && opts->cpu_list) {
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die("No such device - did you specify"
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" an out-of-range profile CPU?\n");
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} else if (err == EINVAL) {
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if (!opts->exclude_guest_missing &&
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(attr->exclude_guest || attr->exclude_host)) {
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pr_debug("Old kernel, cannot exclude "
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"guest or host samples.\n");
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opts->exclude_guest_missing = true;
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goto fallback_missing_features;
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} else if (!opts->sample_id_all_missing) {
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/*
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* Old kernel, no attr->sample_id_type_all field
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*/
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opts->sample_id_all_missing = true;
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if (!opts->sample_time && !opts->raw_samples && !time_needed)
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attr->sample_type &= ~PERF_SAMPLE_TIME;
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goto retry_sample_id;
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}
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}
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/*
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* If it's cycles then fall back to hrtimer
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* based cpu-clock-tick sw counter, which
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* is always available even if no PMU support:
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*/
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if (attr->type == PERF_TYPE_HARDWARE
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&& attr->config == PERF_COUNT_HW_CPU_CYCLES) {
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if (verbose)
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ui__warning("The cycles event is not supported, "
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"trying to fall back to cpu-clock-ticks\n");
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attr->type = PERF_TYPE_SOFTWARE;
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attr->config = PERF_COUNT_SW_CPU_CLOCK;
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goto try_again;
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}
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if (err == ENOENT) {
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ui__warning("The %s event is not supported.\n",
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event_name(pos));
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exit(EXIT_FAILURE);
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}
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printf("\n");
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error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
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err, strerror(err));
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#if defined(__i386__) || defined(__x86_64__)
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if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
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die("No hardware sampling interrupt available."
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" No APIC? If so then you can boot the kernel"
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" with the \"lapic\" boot parameter to"
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" force-enable it.\n");
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#endif
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die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
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}
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}
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if (perf_evlist__set_filters(evlist)) {
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error("failed to set filter with %d (%s)\n", errno,
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strerror(errno));
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exit(-1);
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}
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if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
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if (errno == EPERM)
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die("Permission error mapping pages.\n"
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"Consider increasing "
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"/proc/sys/kernel/perf_event_mlock_kb,\n"
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"or try again with a smaller value of -m/--mmap_pages.\n"
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"(current value: %d)\n", opts->mmap_pages);
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else if (!is_power_of_2(opts->mmap_pages))
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die("--mmap_pages/-m value must be a power of two.");
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die("failed to mmap with %d (%s)\n", errno, strerror(errno));
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}
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if (rec->file_new)
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session->evlist = evlist;
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else {
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if (!perf_evlist__equal(session->evlist, evlist)) {
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fprintf(stderr, "incompatible append\n");
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exit(-1);
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}
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}
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perf_session__update_sample_type(session);
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}
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static int process_buildids(struct perf_record *rec)
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{
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u64 size = lseek(rec->output, 0, SEEK_CUR);
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if (size == 0)
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return 0;
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rec->session->fd = rec->output;
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return __perf_session__process_events(rec->session, rec->post_processing_offset,
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size - rec->post_processing_offset,
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size, &build_id__mark_dso_hit_ops);
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}
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static void perf_record__exit(int status __used, void *arg)
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{
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struct perf_record *rec = arg;
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if (!rec->opts.pipe_output) {
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rec->session->header.data_size += rec->bytes_written;
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if (!rec->no_buildid)
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process_buildids(rec);
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perf_session__write_header(rec->session, rec->evlist,
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rec->output, true);
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perf_session__delete(rec->session);
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perf_evlist__delete(rec->evlist);
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symbol__exit();
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}
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}
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static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
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{
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int err;
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struct perf_tool *tool = data;
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if (machine__is_host(machine))
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return;
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/*
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*As for guest kernel when processing subcommand record&report,
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*we arrange module mmap prior to guest kernel mmap and trigger
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*a preload dso because default guest module symbols are loaded
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*from guest kallsyms instead of /lib/modules/XXX/XXX. This
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*method is used to avoid symbol missing when the first addr is
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*in module instead of in guest kernel.
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*/
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err = perf_event__synthesize_modules(tool, process_synthesized_event,
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machine);
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if (err < 0)
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pr_err("Couldn't record guest kernel [%d]'s reference"
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" relocation symbol.\n", machine->pid);
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/*
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* We use _stext for guest kernel because guest kernel's /proc/kallsyms
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* have no _text sometimes.
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*/
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err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
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machine, "_text");
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if (err < 0)
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err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
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machine, "_stext");
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if (err < 0)
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pr_err("Couldn't record guest kernel [%d]'s reference"
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" relocation symbol.\n", machine->pid);
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}
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static struct perf_event_header finished_round_event = {
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.size = sizeof(struct perf_event_header),
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.type = PERF_RECORD_FINISHED_ROUND,
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};
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static void perf_record__mmap_read_all(struct perf_record *rec)
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{
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int i;
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for (i = 0; i < rec->evlist->nr_mmaps; i++) {
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if (rec->evlist->mmap[i].base)
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perf_record__mmap_read(rec, &rec->evlist->mmap[i]);
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}
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if (perf_header__has_feat(&rec->session->header, HEADER_TRACE_INFO))
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write_output(rec, &finished_round_event, sizeof(finished_round_event));
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}
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static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
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{
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struct stat st;
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int flags;
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int err, output, feat;
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unsigned long waking = 0;
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const bool forks = argc > 0;
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struct machine *machine;
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struct perf_tool *tool = &rec->tool;
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struct perf_record_opts *opts = &rec->opts;
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struct perf_evlist *evsel_list = rec->evlist;
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const char *output_name = rec->output_name;
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struct perf_session *session;
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rec->progname = argv[0];
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rec->page_size = sysconf(_SC_PAGE_SIZE);
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on_exit(perf_record__sig_exit, rec);
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signal(SIGCHLD, sig_handler);
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signal(SIGINT, sig_handler);
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signal(SIGUSR1, sig_handler);
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if (!output_name) {
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if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
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opts->pipe_output = true;
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else
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rec->output_name = output_name = "perf.data";
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}
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if (output_name) {
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if (!strcmp(output_name, "-"))
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opts->pipe_output = true;
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else if (!stat(output_name, &st) && st.st_size) {
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if (rec->write_mode == WRITE_FORCE) {
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char oldname[PATH_MAX];
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snprintf(oldname, sizeof(oldname), "%s.old",
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output_name);
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unlink(oldname);
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rename(output_name, oldname);
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}
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} else if (rec->write_mode == WRITE_APPEND) {
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rec->write_mode = WRITE_FORCE;
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}
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}
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flags = O_CREAT|O_RDWR;
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if (rec->write_mode == WRITE_APPEND)
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rec->file_new = 0;
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else
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flags |= O_TRUNC;
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|
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if (opts->pipe_output)
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output = STDOUT_FILENO;
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else
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output = open(output_name, flags, S_IRUSR | S_IWUSR);
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if (output < 0) {
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perror("failed to create output file");
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exit(-1);
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}
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rec->output = output;
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session = perf_session__new(output_name, O_WRONLY,
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rec->write_mode == WRITE_FORCE, false, NULL);
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if (session == NULL) {
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pr_err("Not enough memory for reading perf file header\n");
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return -1;
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}
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|
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rec->session = session;
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for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
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perf_header__set_feat(&session->header, feat);
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|
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if (rec->no_buildid)
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perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
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|
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if (!have_tracepoints(&evsel_list->entries))
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perf_header__clear_feat(&session->header, HEADER_TRACE_INFO);
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|
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if (!rec->opts.branch_stack)
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perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
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|
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if (!rec->file_new) {
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err = perf_session__read_header(session, output);
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if (err < 0)
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goto out_delete_session;
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}
|
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|
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if (forks) {
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err = perf_evlist__prepare_workload(evsel_list, opts, argv);
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if (err < 0) {
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pr_err("Couldn't run the workload!\n");
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goto out_delete_session;
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}
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}
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|
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perf_record__open(rec);
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|
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/*
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* perf_session__delete(session) will be called at perf_record__exit()
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*/
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on_exit(perf_record__exit, rec);
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|
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if (opts->pipe_output) {
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err = perf_header__write_pipe(output);
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if (err < 0)
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return err;
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} else if (rec->file_new) {
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err = perf_session__write_header(session, evsel_list,
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output, false);
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if (err < 0)
|
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return err;
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}
|
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|
|
if (!rec->no_buildid
|
|
&& !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
|
|
pr_err("Couldn't generate buildids. "
|
|
"Use --no-buildid to profile anyway.\n");
|
|
return -1;
|
|
}
|
|
|
|
rec->post_processing_offset = lseek(output, 0, SEEK_CUR);
|
|
|
|
machine = perf_session__find_host_machine(session);
|
|
if (!machine) {
|
|
pr_err("Couldn't find native kernel information.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (opts->pipe_output) {
|
|
err = perf_event__synthesize_attrs(tool, session,
|
|
process_synthesized_event);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize attrs.\n");
|
|
return err;
|
|
}
|
|
|
|
err = perf_event__synthesize_event_types(tool, process_synthesized_event,
|
|
machine);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize event_types.\n");
|
|
return err;
|
|
}
|
|
|
|
if (have_tracepoints(&evsel_list->entries)) {
|
|
/*
|
|
* FIXME err <= 0 here actually means that
|
|
* there were no tracepoints so its not really
|
|
* an error, just that we don't need to
|
|
* synthesize anything. We really have to
|
|
* return this more properly and also
|
|
* propagate errors that now are calling die()
|
|
*/
|
|
err = perf_event__synthesize_tracing_data(tool, output, evsel_list,
|
|
process_synthesized_event);
|
|
if (err <= 0) {
|
|
pr_err("Couldn't record tracing data.\n");
|
|
return err;
|
|
}
|
|
advance_output(rec, err);
|
|
}
|
|
}
|
|
|
|
err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
|
|
machine, "_text");
|
|
if (err < 0)
|
|
err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
|
|
machine, "_stext");
|
|
if (err < 0)
|
|
pr_err("Couldn't record kernel reference relocation symbol\n"
|
|
"Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
|
|
"Check /proc/kallsyms permission or run as root.\n");
|
|
|
|
err = perf_event__synthesize_modules(tool, process_synthesized_event,
|
|
machine);
|
|
if (err < 0)
|
|
pr_err("Couldn't record kernel module information.\n"
|
|
"Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
|
|
"Check /proc/modules permission or run as root.\n");
|
|
|
|
if (perf_guest)
|
|
perf_session__process_machines(session, tool,
|
|
perf_event__synthesize_guest_os);
|
|
|
|
if (!opts->system_wide)
|
|
perf_event__synthesize_thread_map(tool, evsel_list->threads,
|
|
process_synthesized_event,
|
|
machine);
|
|
else
|
|
perf_event__synthesize_threads(tool, process_synthesized_event,
|
|
machine);
|
|
|
|
if (rec->realtime_prio) {
|
|
struct sched_param param;
|
|
|
|
param.sched_priority = rec->realtime_prio;
|
|
if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
|
|
pr_err("Could not set realtime priority.\n");
|
|
exit(-1);
|
|
}
|
|
}
|
|
|
|
perf_evlist__enable(evsel_list);
|
|
|
|
/*
|
|
* Let the child rip
|
|
*/
|
|
if (forks)
|
|
perf_evlist__start_workload(evsel_list);
|
|
|
|
for (;;) {
|
|
int hits = rec->samples;
|
|
|
|
perf_record__mmap_read_all(rec);
|
|
|
|
if (hits == rec->samples) {
|
|
if (done)
|
|
break;
|
|
err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
|
|
waking++;
|
|
}
|
|
|
|
if (done)
|
|
perf_evlist__disable(evsel_list);
|
|
}
|
|
|
|
if (quiet || signr == SIGUSR1)
|
|
return 0;
|
|
|
|
fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
|
|
|
|
/*
|
|
* Approximate RIP event size: 24 bytes.
|
|
*/
|
|
fprintf(stderr,
|
|
"[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
|
|
(double)rec->bytes_written / 1024.0 / 1024.0,
|
|
output_name,
|
|
rec->bytes_written / 24);
|
|
|
|
return 0;
|
|
|
|
out_delete_session:
|
|
perf_session__delete(session);
|
|
return err;
|
|
}
|
|
|
|
#define BRANCH_OPT(n, m) \
|
|
{ .name = n, .mode = (m) }
|
|
|
|
#define BRANCH_END { .name = NULL }
|
|
|
|
struct branch_mode {
|
|
const char *name;
|
|
int mode;
|
|
};
|
|
|
|
static const struct branch_mode branch_modes[] = {
|
|
BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
|
|
BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
|
|
BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
|
|
BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
|
|
BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
|
|
BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
|
|
BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
|
|
BRANCH_END
|
|
};
|
|
|
|
static int
|
|
parse_branch_stack(const struct option *opt, const char *str, int unset)
|
|
{
|
|
#define ONLY_PLM \
|
|
(PERF_SAMPLE_BRANCH_USER |\
|
|
PERF_SAMPLE_BRANCH_KERNEL |\
|
|
PERF_SAMPLE_BRANCH_HV)
|
|
|
|
uint64_t *mode = (uint64_t *)opt->value;
|
|
const struct branch_mode *br;
|
|
char *s, *os = NULL, *p;
|
|
int ret = -1;
|
|
|
|
if (unset)
|
|
return 0;
|
|
|
|
/*
|
|
* cannot set it twice, -b + --branch-filter for instance
|
|
*/
|
|
if (*mode)
|
|
return -1;
|
|
|
|
/* str may be NULL in case no arg is passed to -b */
|
|
if (str) {
|
|
/* because str is read-only */
|
|
s = os = strdup(str);
|
|
if (!s)
|
|
return -1;
|
|
|
|
for (;;) {
|
|
p = strchr(s, ',');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
for (br = branch_modes; br->name; br++) {
|
|
if (!strcasecmp(s, br->name))
|
|
break;
|
|
}
|
|
if (!br->name) {
|
|
ui__warning("unknown branch filter %s,"
|
|
" check man page\n", s);
|
|
goto error;
|
|
}
|
|
|
|
*mode |= br->mode;
|
|
|
|
if (!p)
|
|
break;
|
|
|
|
s = p + 1;
|
|
}
|
|
}
|
|
ret = 0;
|
|
|
|
/* default to any branch */
|
|
if ((*mode & ~ONLY_PLM) == 0) {
|
|
*mode = PERF_SAMPLE_BRANCH_ANY;
|
|
}
|
|
error:
|
|
free(os);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const record_usage[] = {
|
|
"perf record [<options>] [<command>]",
|
|
"perf record [<options>] -- <command> [<options>]",
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* XXX Ideally would be local to cmd_record() and passed to a perf_record__new
|
|
* because we need to have access to it in perf_record__exit, that is called
|
|
* after cmd_record() exits, but since record_options need to be accessible to
|
|
* builtin-script, leave it here.
|
|
*
|
|
* At least we don't ouch it in all the other functions here directly.
|
|
*
|
|
* Just say no to tons of global variables, sigh.
|
|
*/
|
|
static struct perf_record record = {
|
|
.opts = {
|
|
.mmap_pages = UINT_MAX,
|
|
.user_freq = UINT_MAX,
|
|
.user_interval = ULLONG_MAX,
|
|
.freq = 1000,
|
|
},
|
|
.write_mode = WRITE_FORCE,
|
|
.file_new = true,
|
|
};
|
|
|
|
/*
|
|
* XXX Will stay a global variable till we fix builtin-script.c to stop messing
|
|
* with it and switch to use the library functions in perf_evlist that came
|
|
* from builtin-record.c, i.e. use perf_record_opts,
|
|
* perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
|
|
* using pipes, etc.
|
|
*/
|
|
const struct option record_options[] = {
|
|
OPT_CALLBACK('e', "event", &record.evlist, "event",
|
|
"event selector. use 'perf list' to list available events",
|
|
parse_events_option),
|
|
OPT_CALLBACK(0, "filter", &record.evlist, "filter",
|
|
"event filter", parse_filter),
|
|
OPT_STRING('p', "pid", &record.opts.target_pid, "pid",
|
|
"record events on existing process id"),
|
|
OPT_STRING('t', "tid", &record.opts.target_tid, "tid",
|
|
"record events on existing thread id"),
|
|
OPT_INTEGER('r', "realtime", &record.realtime_prio,
|
|
"collect data with this RT SCHED_FIFO priority"),
|
|
OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay,
|
|
"collect data without buffering"),
|
|
OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
|
|
"collect raw sample records from all opened counters"),
|
|
OPT_BOOLEAN('a', "all-cpus", &record.opts.system_wide,
|
|
"system-wide collection from all CPUs"),
|
|
OPT_BOOLEAN('A', "append", &record.append_file,
|
|
"append to the output file to do incremental profiling"),
|
|
OPT_STRING('C', "cpu", &record.opts.cpu_list, "cpu",
|
|
"list of cpus to monitor"),
|
|
OPT_BOOLEAN('f', "force", &record.force,
|
|
"overwrite existing data file (deprecated)"),
|
|
OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
|
|
OPT_STRING('o', "output", &record.output_name, "file",
|
|
"output file name"),
|
|
OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit,
|
|
"child tasks do not inherit counters"),
|
|
OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
|
|
OPT_UINTEGER('m', "mmap-pages", &record.opts.mmap_pages,
|
|
"number of mmap data pages"),
|
|
OPT_BOOLEAN(0, "group", &record.opts.group,
|
|
"put the counters into a counter group"),
|
|
OPT_BOOLEAN('g', "call-graph", &record.opts.call_graph,
|
|
"do call-graph (stack chain/backtrace) recording"),
|
|
OPT_INCR('v', "verbose", &verbose,
|
|
"be more verbose (show counter open errors, etc)"),
|
|
OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
|
|
OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
|
|
"per thread counts"),
|
|
OPT_BOOLEAN('d', "data", &record.opts.sample_address,
|
|
"Sample addresses"),
|
|
OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"),
|
|
OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"),
|
|
OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
|
|
"don't sample"),
|
|
OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache,
|
|
"do not update the buildid cache"),
|
|
OPT_BOOLEAN('B', "no-buildid", &record.no_buildid,
|
|
"do not collect buildids in perf.data"),
|
|
OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
|
|
"monitor event in cgroup name only",
|
|
parse_cgroups),
|
|
OPT_STRING('u', "uid", &record.uid_str, "user", "user to profile"),
|
|
|
|
OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
|
|
"branch any", "sample any taken branches",
|
|
parse_branch_stack),
|
|
|
|
OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
|
|
"branch filter mask", "branch stack filter modes",
|
|
parse_branch_stack),
|
|
OPT_END()
|
|
};
|
|
|
|
int cmd_record(int argc, const char **argv, const char *prefix __used)
|
|
{
|
|
int err = -ENOMEM;
|
|
struct perf_evsel *pos;
|
|
struct perf_evlist *evsel_list;
|
|
struct perf_record *rec = &record;
|
|
|
|
perf_header__set_cmdline(argc, argv);
|
|
|
|
evsel_list = perf_evlist__new(NULL, NULL);
|
|
if (evsel_list == NULL)
|
|
return -ENOMEM;
|
|
|
|
rec->evlist = evsel_list;
|
|
|
|
argc = parse_options(argc, argv, record_options, record_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
if (!argc && !rec->opts.target_pid && !rec->opts.target_tid &&
|
|
!rec->opts.system_wide && !rec->opts.cpu_list && !rec->uid_str)
|
|
usage_with_options(record_usage, record_options);
|
|
|
|
if (rec->force && rec->append_file) {
|
|
fprintf(stderr, "Can't overwrite and append at the same time."
|
|
" You need to choose between -f and -A");
|
|
usage_with_options(record_usage, record_options);
|
|
} else if (rec->append_file) {
|
|
rec->write_mode = WRITE_APPEND;
|
|
} else {
|
|
rec->write_mode = WRITE_FORCE;
|
|
}
|
|
|
|
if (nr_cgroups && !rec->opts.system_wide) {
|
|
fprintf(stderr, "cgroup monitoring only available in"
|
|
" system-wide mode\n");
|
|
usage_with_options(record_usage, record_options);
|
|
}
|
|
|
|
symbol__init();
|
|
|
|
if (symbol_conf.kptr_restrict)
|
|
pr_warning(
|
|
"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
|
|
"check /proc/sys/kernel/kptr_restrict.\n\n"
|
|
"Samples in kernel functions may not be resolved if a suitable vmlinux\n"
|
|
"file is not found in the buildid cache or in the vmlinux path.\n\n"
|
|
"Samples in kernel modules won't be resolved at all.\n\n"
|
|
"If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
|
|
"even with a suitable vmlinux or kallsyms file.\n\n");
|
|
|
|
if (rec->no_buildid_cache || rec->no_buildid)
|
|
disable_buildid_cache();
|
|
|
|
if (evsel_list->nr_entries == 0 &&
|
|
perf_evlist__add_default(evsel_list) < 0) {
|
|
pr_err("Not enough memory for event selector list\n");
|
|
goto out_symbol_exit;
|
|
}
|
|
|
|
rec->opts.uid = parse_target_uid(rec->uid_str, rec->opts.target_tid,
|
|
rec->opts.target_pid);
|
|
if (rec->uid_str != NULL && rec->opts.uid == UINT_MAX - 1)
|
|
goto out_free_fd;
|
|
|
|
if (rec->opts.target_pid)
|
|
rec->opts.target_tid = rec->opts.target_pid;
|
|
|
|
if (perf_evlist__create_maps(evsel_list, rec->opts.target_pid,
|
|
rec->opts.target_tid, rec->opts.uid,
|
|
rec->opts.cpu_list) < 0)
|
|
usage_with_options(record_usage, record_options);
|
|
|
|
list_for_each_entry(pos, &evsel_list->entries, node) {
|
|
if (perf_header__push_event(pos->attr.config, event_name(pos)))
|
|
goto out_free_fd;
|
|
}
|
|
|
|
if (rec->opts.user_interval != ULLONG_MAX)
|
|
rec->opts.default_interval = rec->opts.user_interval;
|
|
if (rec->opts.user_freq != UINT_MAX)
|
|
rec->opts.freq = rec->opts.user_freq;
|
|
|
|
/*
|
|
* User specified count overrides default frequency.
|
|
*/
|
|
if (rec->opts.default_interval)
|
|
rec->opts.freq = 0;
|
|
else if (rec->opts.freq) {
|
|
rec->opts.default_interval = rec->opts.freq;
|
|
} else {
|
|
fprintf(stderr, "frequency and count are zero, aborting\n");
|
|
err = -EINVAL;
|
|
goto out_free_fd;
|
|
}
|
|
|
|
err = __cmd_record(&record, argc, argv);
|
|
out_free_fd:
|
|
perf_evlist__delete_maps(evsel_list);
|
|
out_symbol_exit:
|
|
symbol__exit();
|
|
return err;
|
|
}
|