#include <libelf.h>
#include <gelf.h>
#include <elf.h>
-#include <ctype.h>
#include "util/list.h"
#include "util/cache.h"
#define SHOW_HV 4
static char const *input_name = "perf.data";
+static char *vmlinux = NULL;
+static char *sort_order = "pid,symbol";
static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
{
return elf_sym__type(sym) == STT_FUNC &&
sym->st_name != 0 &&
- sym->st_shndx != SHN_UNDEF;
+ sym->st_shndx != SHN_UNDEF &&
+ sym->st_size != 0;
}
static inline const char *elf_sym__name(const GElf_Sym *sym,
return sec;
}
-static int dso__load(struct dso *self)
+static int dso__load_sym(struct dso *self, int fd, char *name)
{
Elf_Data *symstrs;
uint32_t nr_syms;
- int fd, err = -1;
+ int err = -1;
uint32_t index;
GElf_Ehdr ehdr;
GElf_Shdr shdr;
GElf_Sym sym;
Elf_Scn *sec;
Elf *elf;
-
-
- fd = open(self->name, O_RDONLY);
- if (fd == -1)
- return -1;
+ int nr = 0;
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
if (elf == NULL) {
fprintf(stderr, "%s: cannot read %s ELF file.\n",
- __func__, self->name);
+ __func__, name);
goto out_close;
}
goto out_elf_end;
dso__insert_symbol(self, f);
+
+ nr++;
}
- err = 0;
+ err = nr;
out_elf_end:
elf_end(elf);
out_close:
- close(fd);
return err;
}
+static int dso__load(struct dso *self)
+{
+ int size = strlen(self->name) + sizeof("/usr/lib/debug%s.debug");
+ char *name = malloc(size);
+ int variant = 0;
+ int ret = -1;
+ int fd;
+
+ if (!name)
+ return -1;
+
+more:
+ do {
+ switch (variant) {
+ case 0: /* Fedora */
+ snprintf(name, size, "/usr/lib/debug%s.debug", self->name);
+ break;
+ case 1: /* Ubuntu */
+ snprintf(name, size, "/usr/lib/debug%s", self->name);
+ break;
+ case 2: /* Sane people */
+ snprintf(name, size, "%s", self->name);
+ break;
+
+ default:
+ goto out;
+ }
+ variant++;
+
+ fd = open(name, O_RDONLY);
+ } while (fd < 0);
+
+ ret = dso__load_sym(self, fd, name);
+ close(fd);
+
+ /*
+ * Some people seem to have debuginfo files _WITHOUT_ debug info!?!?
+ */
+ if (!ret)
+ goto more;
+
+out:
+ free(name);
+ return ret;
+}
+
static size_t dso__fprintf(struct dso *self, FILE *fp)
{
size_t ret = fprintf(fp, "dso: %s\n", self->name);
static struct dso *dsos__findnew(const char *name)
{
struct dso *dso = dsos__find(name);
+ int nr;
if (dso == NULL) {
dso = dso__new(name);
- if (dso != NULL && dso__load(dso) < 0)
+ if (!dso)
+ goto out_delete_dso;
+
+ nr = dso__load(dso);
+ if (nr < 0) {
+ fprintf(stderr, "Failed to open: %s\n", name);
goto out_delete_dso;
+ }
+ if (!nr) {
+ fprintf(stderr,
+ "Failed to find debug symbols for: %s, maybe install a debug package?\n",
+ name);
+ }
dsos__add(dso);
}
return -1;
}
+static int load_kernel(void)
+{
+ int fd, nr;
+
+ if (!vmlinux)
+ goto kallsyms;
+
+ fd = open(vmlinux, O_RDONLY);
+ if (fd < 0)
+ goto kallsyms;
+
+ kernel_dso = dso__new("[kernel]");
+ if (!kernel_dso)
+ goto fail_open;
+
+ nr = dso__load_sym(kernel_dso, fd, vmlinux);
+
+ if (nr <= 0)
+ goto fail_load;
+
+ dsos__add(kernel_dso);
+ close(fd);
+
+ return 0;
+
+fail_load:
+ dso__delete(kernel_dso);
+fail_open:
+ close(fd);
+kallsyms:
+ return load_kallsyms();
+}
+
struct map {
struct list_head node;
uint64_t start;
struct thread;
-static const char *thread__name(struct thread *self, char *bf, size_t size);
-
-struct symhist {
- struct rb_node rb_node;
- struct dso *dso;
- struct symbol *sym;
- struct thread *thread;
- uint64_t ip;
- uint32_t count;
- char level;
-};
-
-static struct symhist *symhist__new(struct symbol *sym, uint64_t ip,
- struct thread *thread, struct dso *dso,
- char level)
-{
- struct symhist *self = malloc(sizeof(*self));
-
- if (self != NULL) {
- self->sym = sym;
- self->thread = thread;
- self->ip = ip;
- self->dso = dso;
- self->level = level;
- self->count = 1;
- }
-
- return self;
-}
-
-static void symhist__inc(struct symhist *self)
-{
- ++self->count;
-}
-
-static size_t
-symhist__fprintf(struct symhist *self, uint64_t total_samples, FILE *fp)
-{
- char bf[32];
- size_t ret;
-
- if (total_samples)
- ret = fprintf(fp, "%5.2f", (self->count * 100.0) / total_samples);
- else
- ret = fprintf(fp, "%12d", self->count);
-
- ret += fprintf(fp, "%14s [%c] ",
- thread__name(self->thread, bf, sizeof(bf)),
- self->level);
-
- if (verbose)
- ret += fprintf(fp, "%#018llx ", (unsigned long long)self->ip);
-
- if (self->level != '.')
- ret += fprintf(fp, "%s\n",
- self->sym ? self->sym->name : "<unknown>");
- else
- ret += fprintf(fp, "%s: %s\n",
- self->dso ? self->dso->name : "<unknown>",
- self->sym ? self->sym->name : "<unknown>");
- return ret;
-}
-
struct thread {
struct rb_node rb_node;
struct list_head maps;
- struct rb_root symhists;
pid_t pid;
char *comm;
};
-static const char *thread__name(struct thread *self, char *bf, size_t size)
-{
- if (self->comm)
- return self->comm;
-
- snprintf(bf, sizeof(bf), ":%u", self->pid);
- return bf;
-}
-
static struct thread *thread__new(pid_t pid)
{
struct thread *self = malloc(sizeof(*self));
self->pid = pid;
self->comm = NULL;
INIT_LIST_HEAD(&self->maps);
- self->symhists = RB_ROOT;
}
return self;
}
-static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
- uint64_t ip, struct dso *dso, char level)
-{
- struct rb_node **p = &self->symhists.rb_node;
- struct rb_node *parent = NULL;
- struct symhist *sh;
-
- while (*p != NULL) {
- uint64_t start;
-
- parent = *p;
- sh = rb_entry(parent, struct symhist, rb_node);
-
- if (sh->sym == sym || ip == sh->ip) {
- symhist__inc(sh);
- return 0;
- }
-
- /* Handle unresolved symbols too */
- start = !sh->sym ? sh->ip : sh->sym->start;
-
- if (ip < start)
- p = &(*p)->rb_left;
- else
- p = &(*p)->rb_right;
- }
-
- sh = symhist__new(sym, ip, self, dso, level);
- if (sh == NULL)
- return -ENOMEM;
- rb_link_node(&sh->rb_node, parent, p);
- rb_insert_color(&sh->rb_node, &self->symhists);
- return 0;
-}
-
static int thread__set_comm(struct thread *self, const char *comm)
{
self->comm = strdup(comm);
return self->comm ? 0 : -ENOMEM;
}
-static size_t thread__fprintf(struct thread *self, FILE *fp)
-{
- int ret = fprintf(fp, "thread: %d %s\n", self->pid, self->comm);
- struct rb_node *nd;
-
- for (nd = rb_first(&self->symhists); nd; nd = rb_next(nd)) {
- struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
-
- ret += symhist__fprintf(pos, 0, fp);
- }
-
- return ret;
-}
-
static struct rb_root threads;
static struct thread *threads__findnew(pid_t pid)
return NULL;
}
-static void threads__fprintf(FILE *fp)
+/*
+ * histogram, sorted on item, collects counts
+ */
+
+static struct rb_root hist;
+
+struct hist_entry {
+ struct rb_node rb_node;
+
+ struct thread *thread;
+ struct map *map;
+ struct dso *dso;
+ struct symbol *sym;
+ uint64_t ip;
+ char level;
+
+ uint32_t count;
+};
+
+/*
+ * configurable sorting bits
+ */
+
+struct sort_entry {
+ struct list_head list;
+
+ char *header;
+
+ int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
+ size_t (*print)(FILE *fp, struct hist_entry *);
+};
+
+static int64_t
+sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return right->thread->pid - left->thread->pid;
+}
+
+static size_t
+sort__thread_print(FILE *fp, struct hist_entry *self)
{
- struct rb_node *nd;
- for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
- struct thread *pos = rb_entry(nd, struct thread, rb_node);
- thread__fprintf(pos, fp);
+ return fprintf(fp, " %16s:%5d", self->thread->comm ?: "", self->thread->pid);
+}
+
+static struct sort_entry sort_thread = {
+ .header = " Command: Pid ",
+ .cmp = sort__thread_cmp,
+ .print = sort__thread_print,
+};
+
+static int64_t
+sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ char *comm_l = left->thread->comm;
+ char *comm_r = right->thread->comm;
+
+ if (!comm_l || !comm_r) {
+ if (!comm_l && !comm_r)
+ return 0;
+ else if (!comm_l)
+ return -1;
+ else
+ return 1;
+ }
+
+ return strcmp(comm_l, comm_r);
+}
+
+static size_t
+sort__comm_print(FILE *fp, struct hist_entry *self)
+{
+ return fprintf(fp, " %16s", self->thread->comm ?: "<unknown>");
+}
+
+static struct sort_entry sort_comm = {
+ .header = " Command",
+ .cmp = sort__comm_cmp,
+ .print = sort__comm_print,
+};
+
+static int64_t
+sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ struct dso *dso_l = left->dso;
+ struct dso *dso_r = right->dso;
+
+ if (!dso_l || !dso_r) {
+ if (!dso_l && !dso_r)
+ return 0;
+ else if (!dso_l)
+ return -1;
+ else
+ return 1;
+ }
+
+ return strcmp(dso_l->name, dso_r->name);
+}
+
+static size_t
+sort__dso_print(FILE *fp, struct hist_entry *self)
+{
+ return fprintf(fp, " %64s", self->dso ? self->dso->name : "<unknown>");
+}
+
+static struct sort_entry sort_dso = {
+ .header = " Shared Object",
+ .cmp = sort__dso_cmp,
+ .print = sort__dso_print,
+};
+
+static int64_t
+sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ uint64_t ip_l, ip_r;
+
+ if (left->sym == right->sym)
+ return 0;
+
+ ip_l = left->sym ? left->sym->start : left->ip;
+ ip_r = right->sym ? right->sym->start : right->ip;
+
+ return (int64_t)(ip_r - ip_l);
+}
+
+static size_t
+sort__sym_print(FILE *fp, struct hist_entry *self)
+{
+ size_t ret = 0;
+
+ if (verbose)
+ ret += fprintf(fp, " %#018llx", (unsigned long long)self->ip);
+
+ ret += fprintf(fp, " %s: %s",
+ self->dso ? self->dso->name : "<unknown>",
+ self->sym ? self->sym->name : "<unknown>");
+
+ return ret;
+}
+
+static struct sort_entry sort_sym = {
+ .header = "Shared Object: Symbol",
+ .cmp = sort__sym_cmp,
+ .print = sort__sym_print,
+};
+
+struct sort_dimension {
+ char *name;
+ struct sort_entry *entry;
+ int taken;
+};
+
+static struct sort_dimension sort_dimensions[] = {
+ { .name = "pid", .entry = &sort_thread, },
+ { .name = "comm", .entry = &sort_comm, },
+ { .name = "dso", .entry = &sort_dso, },
+ { .name = "symbol", .entry = &sort_sym, },
+};
+
+static LIST_HEAD(hist_entry__sort_list);
+
+static int sort_dimension__add(char *tok)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
+ struct sort_dimension *sd = &sort_dimensions[i];
+
+ if (sd->taken)
+ continue;
+
+ if (strcmp(tok, sd->name))
+ continue;
+
+ list_add_tail(&sd->entry->list, &hist_entry__sort_list);
+ sd->taken = 1;
+ return 0;
}
+
+ return -ESRCH;
+}
+
+static void setup_sorting(void)
+{
+ char *tmp, *tok, *str = strdup(sort_order);
+
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp))
+ sort_dimension__add(tok);
+
+ free(str);
+}
+
+static int64_t
+hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ struct sort_entry *se;
+ int64_t cmp = 0;
+
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ cmp = se->cmp(left, right);
+ if (cmp)
+ break;
+ }
+
+ return cmp;
+}
+
+static size_t
+hist_entry__fprintf(FILE *fp, struct hist_entry *self, uint64_t total_samples)
+{
+ struct sort_entry *se;
+ size_t ret;
+
+ if (total_samples) {
+ ret = fprintf(fp, " %5.2f%%",
+ (self->count * 100.0) / total_samples);
+ } else
+ ret = fprintf(fp, "%12d ", self->count);
+
+ list_for_each_entry(se, &hist_entry__sort_list, list)
+ ret += se->print(fp, self);
+
+ ret += fprintf(fp, "\n");
+
+ return ret;
}
-static struct rb_root global_symhists;
+/*
+ * collect histogram counts
+ */
-static void threads__insert_symhist(struct symhist *sh)
+static int
+hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
+ struct symbol *sym, uint64_t ip, char level)
{
- struct rb_node **p = &global_symhists.rb_node;
+ struct rb_node **p = &hist.rb_node;
struct rb_node *parent = NULL;
- struct symhist *iter;
+ struct hist_entry *he;
+ struct hist_entry entry = {
+ .thread = thread,
+ .map = map,
+ .dso = dso,
+ .sym = sym,
+ .ip = ip,
+ .level = level,
+ .count = 1,
+ };
+ int cmp;
while (*p != NULL) {
parent = *p;
- iter = rb_entry(parent, struct symhist, rb_node);
+ he = rb_entry(parent, struct hist_entry, rb_node);
+
+ cmp = hist_entry__cmp(&entry, he);
+
+ if (!cmp) {
+ he->count++;
+ return 0;
+ }
- /* Reverse order */
- if (sh->count > iter->count)
+ if (cmp < 0)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
- rb_link_node(&sh->rb_node, parent, p);
- rb_insert_color(&sh->rb_node, &global_symhists);
+ he = malloc(sizeof(*he));
+ if (!he)
+ return -ENOMEM;
+ *he = entry;
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &hist);
+
+ return 0;
}
-static void threads__sort_symhists(void)
+/*
+ * reverse the map, sort on count.
+ */
+
+static struct rb_root output_hists;
+
+static void output__insert_entry(struct hist_entry *he)
{
- struct rb_node *nd;
+ struct rb_node **p = &output_hists.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *iter;
- for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
- struct thread *thread = rb_entry(nd, struct thread, rb_node);
- struct rb_node *next = rb_first(&thread->symhists);
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct hist_entry, rb_node);
- while (next) {
- struct symhist *n = rb_entry(next, struct symhist,
- rb_node);
- next = rb_next(&n->rb_node);
- rb_erase(&n->rb_node, &thread->symhists);
- threads__insert_symhist(n);
- }
+ if (he->count > iter->count)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &output_hists);
+}
+static void output__resort(void)
+{
+ struct rb_node *next = rb_first(&hist);
+ struct hist_entry *n;
+
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ next = rb_next(&n->rb_node);
+
+ rb_erase(&n->rb_node, &hist);
+ output__insert_entry(n);
}
}
-static size_t threads__symhists_fprintf(uint64_t total_samples, FILE *fp)
+static size_t output__fprintf(FILE *fp, uint64_t total_samples)
{
+ struct hist_entry *pos;
+ struct sort_entry *se;
struct rb_node *nd;
size_t ret = 0;
- for (nd = rb_first(&global_symhists); nd; nd = rb_next(nd)) {
- struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
- ret += symhist__fprintf(pos, total_samples, fp);
+ fprintf(fp, "#\n");
+
+ fprintf(fp, "# Overhead");
+ list_for_each_entry(se, &hist_entry__sort_list, list)
+ fprintf(fp, " %s", se->header);
+ fprintf(fp, "\n");
+
+ fprintf(fp, "# ........");
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ int i;
+
+ fprintf(fp, " ");
+ for (i = 0; i < strlen(se->header); i++)
+ fprintf(fp, ".");
+ }
+ fprintf(fp, "\n");
+
+ fprintf(fp, "#\n");
+
+ for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
+ pos = rb_entry(nd, struct hist_entry, rb_node);
+ ret += hist_entry__fprintf(fp, pos, total_samples);
}
return ret;
}
+
static int __cmd_report(void)
{
unsigned long offset = 0;
exit(0);
}
- if (load_kallsyms() < 0) {
+ if (load_kernel() < 0) {
perror("failed to open kallsyms");
return EXIT_FAILURE;
}
struct dso *dso = NULL;
struct thread *thread = threads__findnew(event->ip.pid);
uint64_t ip = event->ip.ip;
+ struct map *map = NULL;
if (dump_trace) {
fprintf(stderr, "%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
}
if (thread == NULL) {
- fprintf(stderr, "problem processing %d event, bailing out\n",
+ fprintf(stderr, "problem processing %d event, skipping it.\n",
event->header.type);
- goto done;
+ goto broken_event;
}
if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
show = SHOW_KERNEL;
level = 'k';
+
dso = kernel_dso;
+
} else if (event->header.misc & PERF_EVENT_MISC_USER) {
- struct map *map;
show = SHOW_USER;
level = '.';
dso = map->dso;
ip -= map->start + map->pgoff;
}
+
} else {
show = SHOW_HV;
level = 'H';
if (show & show_mask) {
struct symbol *sym = dso__find_symbol(dso, ip);
- if (thread__symbol_incnew(thread, sym, ip, dso, level)) {
- fprintf(stderr, "problem incrementing symbol count, bailing out\n");
- goto done;
+ if (hist_entry__add(thread, map, dso, sym, ip, level)) {
+ fprintf(stderr,
+ "problem incrementing symbol count, skipping event\n");
+ goto broken_event;
}
}
total++;
event->mmap.filename);
}
if (thread == NULL || map == NULL) {
- fprintf(stderr, "problem processing PERF_EVENT_MMAP, bailing out\n");
- goto done;
+ fprintf(stderr, "problem processing PERF_EVENT_MMAP, skipping event.\n");
+ goto broken_event;
}
thread__insert_map(thread, map);
total_mmap++;
}
if (thread == NULL ||
thread__set_comm(thread, event->comm.comm)) {
- fprintf(stderr, "problem processing PERF_EVENT_COMM, bailing out\n");
- goto done;
+ fprintf(stderr, "problem processing PERF_EVENT_COMM, skipping event.\n");
+ goto broken_event;
}
total_comm++;
break;
}
default: {
broken_event:
- fprintf(stderr, "%p [%p]: skipping unknown header type: %d\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->header.type);
+ if (dump_trace)
+ fprintf(stderr, "%p [%p]: skipping unknown header type: %d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.type);
+
total_unknown++;
/*
goto more;
rc = EXIT_SUCCESS;
-done:
close(input);
if (dump_trace) {
return 0;
}
- if (verbose >= 2) {
+ if (verbose >= 2)
dsos__fprintf(stdout);
- threads__fprintf(stdout);
- }
- threads__sort_symhists();
- threads__symhists_fprintf(total, stdout);
+ output__resort();
+ output__fprintf(stdout, total);
return rc;
}
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
+ OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+ OPT_STRING('s', "sort", &sort_order, "foo", "bar"),
OPT_END()
};
parse_options(argc, argv, options, report_usage, 0);
+ setup_sorting();
+
setup_pager();
return __cmd_report();
projects / deliverable / linux.git / blobdiff