perf top: Support userspace symbols too
Example:
Compiling the kernel with 'make -k 22 allyesconfig'
[root@emilia linux-2.6-tip]# perf top -r 90
------------------------------------------------------------------------------
PerfTop: 3669 irqs/sec kernel:59.9% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
samples pcnt function DSO
_______ _____ ________________________________ ________________
3062.00 6.5% clear_page_c [kernel]
2233.00 4.8% _int_malloc /lib64/libc-2.5.so
2100.00 4.5% yylex /home/acme/git/build/allyesconfig/scripts/genksyms/genksyms
2029.00 4.3% memset /lib64/libc-2.5.so
1224.00 2.6% page_fault [kernel]
1075.00 2.3% __GI_strlen /lib64/libc-2.5.so
863.00 1.8% sub_preempt_count [kernel]
822.00 1.8% __GI_memcpy /lib64/libc-2.5.so
810.00 1.7% __GI_vfprintf /lib64/libc-2.5.so
786.00 1.7% _int_free /lib64/libc-2.5.so
775.00 1.7% __GI_strcmp /lib64/libc-2.5.so
748.00 1.6% _spin_lock [kernel]
699.00 1.5% main /home/acme/git/build/allyesconfig/scripts/basic/fixdep
659.00 1.4% add_preempt_count [kernel]
649.00 1.4% yyparse /home/acme/git/build/allyesconfig/scripts/genksyms/genksyms
645.00 1.4% preempt_trace [kernel]
635.00 1.4% __GI___libc_free /lib64/libc-2.5.so
597.00 1.3% trace_preempt_on [kernel]
551.00 1.2% __GI___libc_malloc /lib64/libc-2.5.so
516.00 1.1% _spin_lock_irqsave [kernel]
481.00 1.0% copy_user_generic_string [kernel]
479.00 1.0% unmap_vmas [kernel]
429.00 0.9% _IO_file_xsputn_internal /lib64/libc-2.5.so
425.00 0.9% __GI_strncpy /lib64/libc-2.5.so
416.00 0.9% get_page_from_freelist [kernel]
414.00 0.9% malloc_consolidate /lib64/libc-2.5.so
406.00 0.9% get_parent_ip [kernel]
362.00 0.8% __rmqueue [kernel]
347.00 0.7% in_lock_functions [kernel]
316.00 0.7% __d_lookup [kernel]
[root@emilia linux-2.6-tip]#
More polishing is needed to print just DSO basename when not
--verbose, etc.
Supporting a 'comm' column requires some more reworking of 'perf
top' internals as we will need to use something like the hist
entries 'perf report' uses and will be done in another patch.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1256592199-9608-3-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
Ingo Molnar
parent
234fbbf508
commit
5b2bb75a0d
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@ -318,7 +318,7 @@ static void show_details(struct sym_entry *syme)
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}
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/*
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* Symbols will be added here in record_ip and will get out
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* Symbols will be added here in event__process_sample and will get out
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* after decayed.
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*/
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static LIST_HEAD(active_symbols);
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@ -459,18 +459,18 @@ static void print_sym_table(void)
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}
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if (nr_counters == 1)
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printf(" samples pcnt");
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printf(" samples pcnt");
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else
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printf(" weight samples pcnt");
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printf(" weight samples pcnt");
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if (verbose)
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printf(" RIP ");
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printf(" kernel function\n");
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printf(" %s _______ _____",
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printf(" function DSO\n");
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printf(" %s _______ _____",
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nr_counters == 1 ? " " : "______");
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if (verbose)
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printf(" ________________");
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printf(" _______________\n\n");
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printf(" ________________");
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printf(" ________________________________ ________________\n\n");
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for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
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struct symbol *sym;
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@ -486,16 +486,15 @@ static void print_sym_table(void)
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sum_ksamples));
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if (nr_counters == 1 || !display_weighted)
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printf("%20.2f - ", syme->weight);
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printf("%20.2f ", syme->weight);
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else
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printf("%9.1f %10ld - ", syme->weight, syme->snap_count);
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printf("%9.1f %10ld ", syme->weight, syme->snap_count);
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percent_color_fprintf(stdout, "%4.1f%%", pcnt);
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if (verbose)
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printf(" - %016llx", sym->start);
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printf(" : %s", sym->name);
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if (syme->map->dso->name[0] == '[')
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printf(" \t%s", syme->map->dso->name);
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printf(" %016llx", sym->start);
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printf(" %-32s", sym->name);
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printf(" %s", syme->map->dso->short_name);
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printf("\n");
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}
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}
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@ -818,41 +817,97 @@ static int parse_symbols(void)
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return 0;
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}
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/*
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* Binary search in the histogram table and record the hit:
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*/
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static void record_ip(u64 ip, int counter)
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static void event__process_sample(const event_t *self, int counter)
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{
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u64 ip = self->ip.ip;
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struct map *map;
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struct symbol *sym = kernel_maps__find_symbol(ip, &map);
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struct sym_entry *syme;
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struct symbol *sym;
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if (sym != NULL) {
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struct sym_entry *syme = dso__sym_priv(map->dso, sym);
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switch (self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK) {
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case PERF_RECORD_MISC_USER: {
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struct thread *thread = threads__findnew(self->ip.pid);
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if (!syme->skip) {
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syme->count[counter]++;
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record_precise_ip(syme, counter, ip);
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pthread_mutex_lock(&active_symbols_lock);
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if (list_empty(&syme->node) || !syme->node.next)
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__list_insert_active_sym(syme);
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pthread_mutex_unlock(&active_symbols_lock);
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if (thread == NULL)
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return;
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map = thread__find_map(thread, ip);
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if (map != NULL) {
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ip = map->map_ip(map, ip);
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sym = map->dso->find_symbol(map->dso, ip);
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if (sym == NULL)
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return;
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userspace_samples++;
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break;
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}
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}
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samples--;
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}
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static void process_event(u64 ip, int counter, int user)
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{
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samples++;
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if (user) {
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userspace_samples++;
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/*
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* If this is outside of all known maps,
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* and is a negative address, try to look it
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* up in the kernel dso, as it might be a
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* vsyscall or vdso (which executes in user-mode).
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*/
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if ((long long)ip >= 0)
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return;
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/* Fall thru */
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case PERF_RECORD_MISC_KERNEL:
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sym = kernel_maps__find_symbol(ip, &map);
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if (sym == NULL)
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return;
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break;
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default:
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return;
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}
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record_ip(ip, counter);
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syme = dso__sym_priv(map->dso, sym);
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if (!syme->skip) {
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syme->count[counter]++;
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record_precise_ip(syme, counter, ip);
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pthread_mutex_lock(&active_symbols_lock);
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if (list_empty(&syme->node) || !syme->node.next)
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__list_insert_active_sym(syme);
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pthread_mutex_unlock(&active_symbols_lock);
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++samples;
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return;
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}
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}
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static void event__process_mmap(event_t *self)
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{
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struct thread *thread = threads__findnew(self->mmap.pid);
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if (thread != NULL) {
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struct map *map = map__new(&self->mmap, NULL, 0,
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sizeof(struct sym_entry),
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symbol_filter);
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if (map != NULL)
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thread__insert_map(thread, map);
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}
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}
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static void event__process_comm(event_t *self)
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{
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struct thread *thread = threads__findnew(self->comm.pid);
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if (thread != NULL)
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thread__set_comm(thread, self->comm.comm);
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}
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static int event__process(event_t *event)
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{
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switch (event->header.type) {
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case PERF_RECORD_COMM:
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event__process_comm(event);
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break;
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case PERF_RECORD_MMAP:
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event__process_mmap(event);
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break;
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default:
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break;
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}
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return 0;
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}
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struct mmap_data {
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@ -925,13 +980,11 @@ static void mmap_read_counter(struct mmap_data *md)
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event = &event_copy;
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}
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if (event->header.type == PERF_RECORD_SAMPLE)
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event__process_sample(event, md->counter);
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else
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event__process(event);
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old += size;
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if (event->header.type == PERF_RECORD_SAMPLE) {
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int user =
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(event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK) == PERF_RECORD_MISC_USER;
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process_event(event->ip.ip, md->counter, user);
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}
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}
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md->prev = old;
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@ -973,6 +1026,7 @@ static void start_counter(int i, int counter)
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}
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attr->inherit = (cpu < 0) && inherit;
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attr->mmap = 1;
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try_again:
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fd[i][counter] = sys_perf_event_open(attr, target_pid, cpu, group_fd, 0);
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@ -1031,6 +1085,11 @@ static int __cmd_top(void)
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int i, counter;
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int ret;
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if (target_pid != -1)
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event__synthesize_thread(target_pid, event__process);
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else
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event__synthesize_threads(event__process);
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for (i = 0; i < nr_cpus; i++) {
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group_fd = -1;
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for (counter = 0; counter < nr_counters; counter++)
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