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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ea251d51d2
Current hist print functions are messy because it has to consider many of command line options and the code doing that is scattered around to places. So when someone wants to add an option to manipulate the hist output it'd very easy to miss to update all of them in sync. And things getting worse as more options/features are added continuously. So I'd like to refactor them using hpp formats and move common code to ui/hist.c in order to make it easy to maintain and to add new features. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1346640790-17197-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
277 lines
7.2 KiB
C
277 lines
7.2 KiB
C
/*
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* builtin-diff.c
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*
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* Builtin diff command: Analyze two perf.data input files, look up and read
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* DSOs and symbol information, sort them and produce a diff.
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*/
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#include "builtin.h"
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#include "util/debug.h"
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#include "util/event.h"
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#include "util/hist.h"
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#include "util/evsel.h"
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#include "util/evlist.h"
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#include "util/session.h"
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#include "util/tool.h"
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#include "util/sort.h"
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#include "util/symbol.h"
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#include "util/util.h"
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#include <stdlib.h>
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static char const *input_old = "perf.data.old",
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*input_new = "perf.data";
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static char diff__default_sort_order[] = "dso,symbol";
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static bool force;
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static bool show_displacement;
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static int hists__add_entry(struct hists *self,
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struct addr_location *al, u64 period)
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{
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if (__hists__add_entry(self, al, NULL, period) != NULL)
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return 0;
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return -ENOMEM;
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}
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static int diff__process_sample_event(struct perf_tool *tool __used,
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union perf_event *event,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct machine *machine)
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{
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struct addr_location al;
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if (perf_event__preprocess_sample(event, machine, &al, sample, NULL) < 0) {
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pr_warning("problem processing %d event, skipping it.\n",
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event->header.type);
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return -1;
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}
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if (al.filtered || al.sym == NULL)
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return 0;
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if (hists__add_entry(&evsel->hists, &al, sample->period)) {
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pr_warning("problem incrementing symbol period, skipping event\n");
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return -1;
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}
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evsel->hists.stats.total_period += sample->period;
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return 0;
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}
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static struct perf_tool tool = {
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.sample = diff__process_sample_event,
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.mmap = perf_event__process_mmap,
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.comm = perf_event__process_comm,
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.exit = perf_event__process_task,
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.fork = perf_event__process_task,
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.lost = perf_event__process_lost,
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.ordered_samples = true,
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.ordering_requires_timestamps = true,
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};
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static void perf_session__insert_hist_entry_by_name(struct rb_root *root,
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struct hist_entry *he)
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{
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struct rb_node **p = &root->rb_node;
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struct rb_node *parent = NULL;
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struct hist_entry *iter;
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while (*p != NULL) {
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parent = *p;
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iter = rb_entry(parent, struct hist_entry, rb_node);
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if (hist_entry__cmp(he, iter) < 0)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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rb_link_node(&he->rb_node, parent, p);
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rb_insert_color(&he->rb_node, root);
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}
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static void hists__resort_entries(struct hists *self)
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{
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unsigned long position = 1;
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struct rb_root tmp = RB_ROOT;
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struct rb_node *next = rb_first(&self->entries);
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while (next != NULL) {
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struct hist_entry *n = rb_entry(next, struct hist_entry, rb_node);
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next = rb_next(&n->rb_node);
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rb_erase(&n->rb_node, &self->entries);
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n->position = position++;
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perf_session__insert_hist_entry_by_name(&tmp, n);
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}
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self->entries = tmp;
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}
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static struct hist_entry *hists__find_entry(struct hists *self,
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struct hist_entry *he)
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{
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struct rb_node *n = self->entries.rb_node;
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while (n) {
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struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node);
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int64_t cmp = hist_entry__cmp(he, iter);
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if (cmp < 0)
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n = n->rb_left;
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else if (cmp > 0)
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n = n->rb_right;
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else
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return iter;
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}
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return NULL;
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}
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static void hists__match(struct hists *older, struct hists *newer)
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{
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struct rb_node *nd;
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for (nd = rb_first(&newer->entries); nd; nd = rb_next(nd)) {
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struct hist_entry *pos = rb_entry(nd, struct hist_entry, rb_node);
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pos->pair = hists__find_entry(older, pos);
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}
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}
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static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
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struct perf_evlist *evlist)
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{
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struct perf_evsel *e;
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list_for_each_entry(e, &evlist->entries, node)
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if (perf_evsel__match2(evsel, e))
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return e;
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return NULL;
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}
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static int __cmd_diff(void)
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{
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int ret, i;
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#define older (session[0])
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#define newer (session[1])
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struct perf_session *session[2];
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struct perf_evlist *evlist_new, *evlist_old;
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struct perf_evsel *evsel;
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bool first = true;
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older = perf_session__new(input_old, O_RDONLY, force, false,
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&tool);
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newer = perf_session__new(input_new, O_RDONLY, force, false,
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&tool);
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if (session[0] == NULL || session[1] == NULL)
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return -ENOMEM;
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for (i = 0; i < 2; ++i) {
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ret = perf_session__process_events(session[i], &tool);
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if (ret)
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goto out_delete;
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}
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evlist_old = older->evlist;
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evlist_new = newer->evlist;
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list_for_each_entry(evsel, &evlist_new->entries, node)
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hists__output_resort(&evsel->hists);
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list_for_each_entry(evsel, &evlist_old->entries, node) {
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hists__output_resort(&evsel->hists);
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if (show_displacement)
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hists__resort_entries(&evsel->hists);
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}
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list_for_each_entry(evsel, &evlist_new->entries, node) {
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struct perf_evsel *evsel_old;
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evsel_old = evsel_match(evsel, evlist_old);
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if (!evsel_old)
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continue;
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fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
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perf_evsel__name(evsel));
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first = false;
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hists__match(&evsel_old->hists, &evsel->hists);
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hists__fprintf(&evsel->hists, &evsel_old->hists,
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show_displacement, true, 0, 0, stdout);
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}
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out_delete:
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for (i = 0; i < 2; ++i)
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perf_session__delete(session[i]);
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return ret;
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#undef older
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#undef newer
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}
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static const char * const diff_usage[] = {
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"perf diff [<options>] [old_file] [new_file]",
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NULL,
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};
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static const struct option options[] = {
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show symbol address, etc)"),
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OPT_BOOLEAN('M', "displacement", &show_displacement,
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"Show position displacement relative to baseline"),
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OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
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"dump raw trace in ASCII"),
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OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
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OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
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"load module symbols - WARNING: use only with -k and LIVE kernel"),
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OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
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"only consider symbols in these dsos"),
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OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
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"only consider symbols in these comms"),
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OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
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"only consider these symbols"),
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OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
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"sort by key(s): pid, comm, dso, symbol, parent"),
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OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
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"separator for columns, no spaces will be added between "
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"columns '.' is reserved."),
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OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
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"Look for files with symbols relative to this directory"),
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OPT_END()
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};
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int cmd_diff(int argc, const char **argv, const char *prefix __used)
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{
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sort_order = diff__default_sort_order;
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argc = parse_options(argc, argv, options, diff_usage, 0);
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if (argc) {
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if (argc > 2)
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usage_with_options(diff_usage, options);
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if (argc == 2) {
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input_old = argv[0];
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input_new = argv[1];
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} else
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input_new = argv[0];
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} else if (symbol_conf.default_guest_vmlinux_name ||
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symbol_conf.default_guest_kallsyms) {
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input_old = "perf.data.host";
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input_new = "perf.data.guest";
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}
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symbol_conf.exclude_other = false;
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if (symbol__init() < 0)
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return -1;
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perf_hpp__init(true, show_displacement);
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setup_sorting(diff_usage, options);
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setup_pager();
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sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", NULL);
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sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", NULL);
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sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", NULL);
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return __cmd_diff();
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}
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