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perf/core improvements and fixes:

Browse Source 
User visible:
 
 - Replace CTRL+z with 'f' as hotkey for enable/disable events (Arnaldo Carvalho de Melo)
 
 - Do not exit when 'f' is pressed in 'report' mode (Arnaldo Carvalho de Melo)
 
 - Tell the user how to unfreeze events after pressing 'f' in 'perf top' (Arnaldo Carvalho de Melo)
 
 - React to unassigned hotkey pressing in 'top/report' (Arnaldo Carvalho de Melo)
 
 - Display total number of samples with --show-total-period in 'annotate' (Martin Liška)
 
 - Add timeout to make procfs mmap processing more robust (Kan Liang)
 
 - Fix sort__sym_cmp to also compare end of symbol (Yannick Brosseau)
 
 Infrastructure:
 
 - Ensure thread-stack is flushed (Adrian Hunter)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

  - Replace CTRL+z with 'f' as hotkey for enable/disable events (Arnaldo Carvalho de Melo)

  - Do not exit when 'f' is pressed in 'report' mode (Arnaldo Carvalho de Melo)

  - Tell the user how to unfreeze events after pressing 'f' in 'perf top' (Arnaldo Carvalho de Melo)

  - React to unassigned hotkey pressing in 'top/report' (Arnaldo Carvalho de Melo)

  - Display total number of samples with --show-total-period in 'annotate' (Martin Liška)

  - Add timeout to make procfs mmap processing more robust (Kan Liang)

  - Fix sort__sym_cmp to also compare end of symbol (Yannick Brosseau)

Infrastructure changes:

  - Ensure thread-stack is flushed (Adrian Hunter)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-06-20 01:11:11 +02:00
commit a9a3cd900f
26 changed files with 278 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/uapi/linux/perf_event.h
View File

@ -565,6 +565,10 @@ struct perf_event_mmap_page {
#define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0)
#define PERF_RECORD_MISC_GUEST_USER (5 << 0)
/*
* Indicates that /proc/PID/maps parsing are truncated by time out.
*/
#define PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT (1 << 12)
/*
* PERF_RECORD_MISC_MMAP_DATA and PERF_RECORD_MISC_COMM_EXEC are used on
* different events so can reuse the same bit position.

6
tools/perf/Documentation/perf-kvm.txt
View File

@ -151,6 +151,12 @@ STAT LIVE OPTIONS
Show events other than HLT (x86 only) or Wait state (s390 only)
that take longer than duration usecs.
--proc-map-timeout::
When processing pre-existing threads /proc/XXX/mmap, it may take
a long time, because the file may be huge. A time out is needed
in such cases.
This option sets the time out limit. The default value is 500 ms.
SEE ALSO
--------
linkperf:perf-top[1], linkperf:perf-record[1], linkperf:perf-report[1],

5
tools/perf/Documentation/perf-record.txt
View File

@ -271,6 +271,11 @@ AUX area tracing event. Optionally the number of bytes to capture per
snapshot can be specified. In Snapshot Mode, trace data is captured only when
signal SIGUSR2 is received.
--proc-map-timeout::
When processing pre-existing threads /proc/XXX/mmap, it may take a long time,
because the file may be huge. A time out is needed in such cases.
This option sets the time out limit. The default value is 500 ms.
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]

6
tools/perf/Documentation/perf-top.txt
View File

@ -201,6 +201,12 @@ Default is to monitor all CPUS.
Force each column width to the provided list, for large terminal
readability. 0 means no limit (default behavior).
--proc-map-timeout::
When processing pre-existing threads /proc/XXX/mmap, it may take
a long time, because the file may be huge. A time out is needed
in such cases.
This option sets the time out limit. The default value is 500 ms.
INTERACTIVE PROMPTING KEYS
--------------------------

5
tools/perf/Documentation/perf-trace.txt
View File

@ -121,6 +121,11 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--event::
Trace other events, see 'perf list' for a complete list.
--proc-map-timeout::
When processing pre-existing threads /proc/XXX/mmap, it may take a long time,
because the file may be huge. A time out is needed in such cases.
This option sets the time out limit. The default value is 500 ms.
PAGEFAULTS
----------

2
tools/perf/builtin-annotate.c
View File

@ -329,6 +329,8 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
"objdump binary to use for disassembly and annotations"),
OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
"Show event group information together"),
OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
"Show a column with the sum of periods"),
OPT_END()
};
int ret = hists__init();

5
tools/perf/builtin-kvm.c
View File

@ -1311,6 +1311,8 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
"show events other than"
" HLT (x86 only) or Wait state (s390 only)"
" that take longer than duration usecs"),
OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
"per thread proc mmap processing timeout in ms"),
OPT_END()
};
const char * const live_usage[] = {
@ -1338,6 +1340,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
kvm->opts.target.uses_mmap = false;
kvm->opts.target.uid_str = NULL;
kvm->opts.target.uid = UINT_MAX;
kvm->opts.proc_map_timeout = 500;
symbol__init(NULL);
disable_buildid_cache();
@ -1393,7 +1396,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
perf_session__set_id_hdr_size(kvm->session);
ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
kvm->evlist->threads, false);
kvm->evlist->threads, false, kvm->opts.proc_map_timeout);
err = kvm_live_open_events(kvm);
if (err)
goto out;

6
tools/perf/builtin-record.c
View File

@ -598,7 +598,8 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
}
err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
process_synthesized_event, opts->sample_address);
process_synthesized_event, opts->sample_address,
opts->proc_map_timeout);
if (err != 0)
goto out_child;
@ -959,6 +960,7 @@ static struct record record = {
.uses_mmap = true,
.default_per_cpu = true,
},
.proc_map_timeout = 500,
},
.tool = {
.sample = process_sample_event,
@ -1066,6 +1068,8 @@ struct option __record_options[] = {
parse_clockid),
OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
"opts", "AUX area tracing Snapshot Mode", ""),
OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
"per thread proc mmap processing timeout in ms"),
OPT_END()
};

15
tools/perf/builtin-top.c
View File

@ -591,7 +591,7 @@ static void *display_thread_tui(void *arg)
top->min_percent,
&top->session->header.env);
if (key != CTRL('z'))
if (key != 'f')
break;
perf_evlist__toggle_enable(top->evlist);
@ -599,7 +599,13 @@ static void *display_thread_tui(void *arg)
* No need to refresh, resort/decay histogram entries
* if we are not collecting samples:
*/
hbt.refresh = top->evlist->enabled ? top->delay_secs : 0;
if (top->evlist->enabled) {
hbt.refresh = top->delay_secs;
help = "Press 'f' to disable the events or 'h' to see other hotkeys";
} else {
help = "Press 'f' again to re-enable the events";
hbt.refresh = 0;
}
}
done = 1;
@ -971,7 +977,7 @@ static int __cmd_top(struct perf_top *top)
goto out_delete;
machine__synthesize_threads(&top->session->machines.host, &opts->target,
top->evlist->threads, false);
top->evlist->threads, false, opts->proc_map_timeout);
ret = perf_top__start_counters(top);
if (ret)
goto out_delete;
@ -1081,6 +1087,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
.target = {
.uses_mmap = true,
},
.proc_map_timeout = 500,
},
.max_stack = PERF_MAX_STACK_DEPTH,
.sym_pcnt_filter = 5,
@ -1180,6 +1187,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
"width[,width...]",
"don't try to adjust column width, use these fixed values"),
OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
"per thread proc mmap processing timeout in ms"),
OPT_END()
};
const char * const top_usage[] = {

6
tools/perf/builtin-trace.c
View File

@ -1518,7 +1518,8 @@ static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
return -ENOMEM;
err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
evlist->threads, trace__tool_process, false);
evlist->threads, trace__tool_process, false,
trace->opts.proc_map_timeout);
if (err)
symbol__exit();
@ -2747,6 +2748,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
.user_interval = ULLONG_MAX,
.no_buffering = true,
.mmap_pages = UINT_MAX,
.proc_map_timeout = 500,
},
.output = stdout,
.show_comm = true,
@ -2796,6 +2798,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
"Trace pagefaults", parse_pagefaults, "maj"),
OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
"per thread proc mmap processing timeout in ms"),
OPT_END()
};
const char * const trace_subcommands[] = { "record", NULL };

1
tools/perf/perf.h
View File

@ -69,6 +69,7 @@ struct record_opts {
unsigned initial_delay;
bool use_clockid;
clockid_t clockid;
unsigned int proc_map_timeout;
};
struct option;

2
tools/perf/tests/code-reading.c
View File

@ -451,7 +451,7 @@ static int do_test_code_reading(bool try_kcore)
}
ret = perf_event__synthesize_thread_map(NULL, threads,
perf_event__process, machine, false);
perf_event__process, machine, false, 500);
if (ret < 0) {
pr_debug("perf_event__synthesize_thread_map failed\n");
goto out_err;

2
tools/perf/tests/dwarf-unwind.c
View File

@ -28,7 +28,7 @@ static int init_live_machine(struct machine *machine)
pid_t pid = getpid();
return perf_event__synthesize_mmap_events(NULL, &event, pid, pid,
mmap_handler, machine, true);
mmap_handler, machine, true, 500);
}
#define MAX_STACK 8

4
tools/perf/tests/mmap-thread-lookup.c
View File

@ -129,7 +129,7 @@ static int synth_all(struct machine *machine)
{
return perf_event__synthesize_threads(NULL,
perf_event__process,
machine, 0);
machine, 0, 500);
}
static int synth_process(struct machine *machine)
@ -141,7 +141,7 @@ static int synth_process(struct machine *machine)
err = perf_event__synthesize_thread_map(NULL, map,
perf_event__process,
machine, 0);
machine, 0, 500);
thread_map__delete(map);
return err;

60
tools/perf/ui/browsers/annotate.c
View File

@ -11,16 +11,21 @@
#include "../../util/evsel.h"
#include <pthread.h>
struct disasm_line_samples {
double percent;
u64 nr;
};
struct browser_disasm_line {
struct rb_node rb_node;
u32 idx;
int idx_asm;
int jump_sources;
struct rb_node rb_node;
u32 idx;
int idx_asm;
int jump_sources;
/*
* actual length of this array is saved on the nr_events field
* of the struct annotate_browser
*/
double percent[1];
struct disasm_line_samples samples[1];
};
static struct annotate_browser_opt {
@ -28,7 +33,8 @@ static struct annotate_browser_opt {
use_offset,
jump_arrows,
show_linenr,
show_nr_jumps;
show_nr_jumps,
show_total_period;
} annotate_browser__opts = {
.use_offset = true,
.jump_arrows = true,
@ -105,15 +111,20 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
char bf[256];
for (i = 0; i < ab->nr_events; i++) {
if (bdl->percent[i] > percent_max)
percent_max = bdl->percent[i];
if (bdl->samples[i].percent > percent_max)
percent_max = bdl->samples[i].percent;
}
if (dl->offset != -1 && percent_max != 0.0) {
for (i = 0; i < ab->nr_events; i++) {
ui_browser__set_percent_color(browser, bdl->percent[i],
ui_browser__set_percent_color(browser,
bdl->samples[i].percent,
current_entry);
slsmg_printf("%6.2f ", bdl->percent[i]);
if (annotate_browser__opts.show_total_period)
slsmg_printf("%6" PRIu64 " ",
bdl->samples[i].nr);
else
slsmg_printf("%6.2f ", bdl->samples[i].percent);
}
} else {
ui_browser__set_percent_color(browser, 0, current_entry);
@ -273,9 +284,9 @@ static int disasm__cmp(struct browser_disasm_line *a,
int i;
for (i = 0; i < nr_pcnt; i++) {
if (a->percent[i] == b->percent[i])
if (a->samples[i].percent == b->samples[i].percent)
continue;
return a->percent[i] < b->percent[i];
return a->samples[i].percent < b->samples[i].percent;
}
return 0;
}
@ -366,14 +377,17 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
next = disasm__get_next_ip_line(&notes->src->source, pos);
for (i = 0; i < browser->nr_events; i++) {
bpos->percent[i] = disasm__calc_percent(notes,
u64 nr_samples;
bpos->samples[i].percent = disasm__calc_percent(notes,
evsel->idx + i,
pos->offset,
next ? next->offset : len,
&path);
&path, &nr_samples);
bpos->samples[i].nr = nr_samples;
if (max_percent < bpos->percent[i])
max_percent = bpos->percent[i];
if (max_percent < bpos->samples[i].percent)
max_percent = bpos->samples[i].percent;
}
if (max_percent < 0.01) {
@ -737,6 +751,7 @@ static int annotate_browser__run(struct annotate_browser *browser,
"n Search next string\n"
"o Toggle disassembler output/simplified view\n"
"s Toggle source code view\n"
"t Toggle total period view\n"
"/ Search string\n"
"k Toggle line numbers\n"
"r Run available scripts\n"
@ -812,6 +827,11 @@ static int annotate_browser__run(struct annotate_browser *browser,
ui_helpline__puts("Actions are only available for 'callq', 'retq' & jump instructions.");
}
continue;
case 't':
annotate_browser__opts.show_total_period =
!annotate_browser__opts.show_total_period;
annotate_browser__update_addr_width(browser);
continue;
case K_LEFT:
case K_ESC:
case 'q':
@ -832,6 +852,10 @@ static int annotate_browser__run(struct annotate_browser *browser,
int map_symbol__tui_annotate(struct map_symbol *ms, struct perf_evsel *evsel,
struct hist_browser_timer *hbt)
{
/* Set default value for show_total_period. */
annotate_browser__opts.show_total_period =
symbol_conf.show_total_period;
return symbol__tui_annotate(ms->sym, ms->map, evsel, hbt);
}
@ -929,7 +953,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map,
if (perf_evsel__is_group_event(evsel)) {
nr_pcnt = evsel->nr_members;
sizeof_bdl += sizeof(double) * (nr_pcnt - 1);
sizeof_bdl += sizeof(struct disasm_line_samples) *
(nr_pcnt - 1);
}
if (symbol__annotate(sym, map, sizeof_bdl) < 0) {
@ -1006,6 +1031,7 @@ static struct annotate_config {
ANNOTATE_CFG(show_linenr),
ANNOTATE_CFG(show_nr_jumps),
ANNOTATE_CFG(use_offset),
ANNOTATE_CFG(show_total_period),
};
#undef ANNOTATE_CFG

15
tools/perf/ui/browsers/hists.c
View File

@ -424,7 +424,7 @@ static void ui_browser__warn_lost_events(struct ui_browser *browser)
"Or reduce the sampling frequency.");
}
static int hist_browser__run(struct hist_browser *browser)
static int hist_browser__run(struct hist_browser *browser, const char *help)
{
int key;
char title[160];
@ -436,8 +436,7 @@ static int hist_browser__run(struct hist_browser *browser)
hists__browser_title(browser->hists, hbt, title, sizeof(title));
if (ui_browser__show(&browser->b, title,
"Press '?' for help on key bindings") < 0)
if (ui_browser__show(&browser->b, title, help) < 0)
return -1;
while (1) {
@ -1736,7 +1735,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
"t Zoom into current Thread\n"
"V Verbose (DSO names in callchains, etc)\n"
"z Toggle zeroing of samples\n"
"CTRL+z Enable/Disable events\n"
"f Enable/Disable events\n"
"/ Filter symbol by name";
if (browser == NULL)
@ -1773,7 +1772,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
nr_options = 0;
key = hist_browser__run(browser);
key = hist_browser__run(browser, helpline);
if (browser->he_selection != NULL) {
thread = hist_browser__selected_thread(browser);
@ -1901,9 +1900,13 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
/* Fall thru */
case 'q':
case CTRL('c'):
case CTRL('z'):
goto out_free_stack;
case 'f':
if (!is_report_browser(hbt))
goto out_free_stack;
/* Fall thru */
default:
helpline = "Press '?' for help on key bindings";
continue;
}

52
tools/perf/util/annotate.c
View File

@ -654,14 +654,15 @@ struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disa
}
double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
s64 end, const char **path)
s64 end, const char **path, u64 *nr_samples)
{
struct source_line *src_line = notes->src->lines;
double percent = 0.0;
*nr_samples = 0;
if (src_line) {
size_t sizeof_src_line = sizeof(*src_line) +
sizeof(src_line->p) * (src_line->nr_pcnt - 1);
sizeof(src_line->samples) * (src_line->nr_pcnt - 1);
while (offset < end) {
src_line = (void *)notes->src->lines +
@ -670,7 +671,8 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
if (*path == NULL)
*path = src_line->path;
percent += src_line->p[evidx].percent;
percent += src_line->samples[evidx].percent;
*nr_samples += src_line->samples[evidx].nr;
offset++;
}
} else {
@ -680,8 +682,10 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
while (offset < end)
hits += h->addr[offset++];
if (h->sum)
if (h->sum) {
*nr_samples = hits;
percent = 100.0 * hits / h->sum;
}
}
return percent;
@ -696,8 +700,10 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
if (dl->offset != -1) {
const char *path = NULL;
u64 nr_samples;
double percent, max_percent = 0.0;
double *ppercents = &percent;
u64 *psamples = &nr_samples;
int i, nr_percent = 1;
const char *color;
struct annotation *notes = symbol__annotation(sym);
@ -710,8 +716,10 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
if (perf_evsel__is_group_event(evsel)) {
nr_percent = evsel->nr_members;
ppercents = calloc(nr_percent, sizeof(double));
if (ppercents == NULL)
psamples = calloc(nr_percent, sizeof(u64));
if (ppercents == NULL || psamples == NULL) {
return -1;
}
}
for (i = 0; i < nr_percent; i++) {
@ -719,9 +727,10 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
notes->src->lines ? i : evsel->idx + i,
offset,
next ? next->offset : (s64) len,
&path);
&path, &nr_samples);
ppercents[i] = percent;
psamples[i] = nr_samples;
if (percent > max_percent)
max_percent = percent;
}
@ -759,8 +768,14 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
for (i = 0; i < nr_percent; i++) {
percent = ppercents[i];
nr_samples = psamples[i];
color = get_percent_color(percent);
color_fprintf(stdout, color, " %7.2f", percent);
if (symbol_conf.show_total_period)
color_fprintf(stdout, color, " %7" PRIu64,
nr_samples);
else
color_fprintf(stdout, color, " %7.2f", percent);
}
printf(" : ");
@ -770,6 +785,9 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
if (ppercents != &percent)
free(ppercents);
if (psamples != &nr_samples)
free(psamples);
} else if (max_lines && printed >= max_lines)
return 1;
else {
@ -1103,7 +1121,7 @@ static void insert_source_line(struct rb_root *root, struct source_line *src_lin
ret = strcmp(iter->path, src_line->path);
if (ret == 0) {
for (i = 0; i < src_line->nr_pcnt; i++)
iter->p[i].percent_sum += src_line->p[i].percent;
iter->samples[i].percent_sum += src_line->samples[i].percent;
return;
}
@ -1114,7 +1132,7 @@ static void insert_source_line(struct rb_root *root, struct source_line *src_lin
}
for (i = 0; i < src_line->nr_pcnt; i++)
src_line->p[i].percent_sum = src_line->p[i].percent;
src_line->samples[i].percent_sum = src_line->samples[i].percent;
rb_link_node(&src_line->node, parent, p);
rb_insert_color(&src_line->node, root);
@ -1125,9 +1143,9 @@ static int cmp_source_line(struct source_line *a, struct source_line *b)
int i;
for (i = 0; i < a->nr_pcnt; i++) {
if (a->p[i].percent_sum == b->p[i].percent_sum)
if (a->samples[i].percent_sum == b->samples[i].percent_sum)
continue;
return a->p[i].percent_sum > b->p[i].percent_sum;
return a->samples[i].percent_sum > b->samples[i].percent_sum;
}
return 0;
@ -1179,7 +1197,7 @@ static void symbol__free_source_line(struct symbol *sym, int len)
int i;
sizeof_src_line = sizeof(*src_line) +
(sizeof(src_line->p) * (src_line->nr_pcnt - 1));
(sizeof(src_line->samples) * (src_line->nr_pcnt - 1));
for (i = 0; i < len; i++) {
free_srcline(src_line->path);
@ -1211,7 +1229,7 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
h_sum += h->sum;
}
nr_pcnt = evsel->nr_members;
sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->p);
sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
}
if (!h_sum)
@ -1231,10 +1249,10 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
for (k = 0; k < nr_pcnt; k++) {
h = annotation__histogram(notes, evidx + k);
src_line->p[k].percent = 100.0 * h->addr[i] / h->sum;
src_line->samples[k].percent = 100.0 * h->addr[i] / h->sum;
if (src_line->p[k].percent > percent_max)
percent_max = src_line->p[k].percent;
if (src_line->samples[k].percent > percent_max)
percent_max = src_line->samples[k].percent;
}
if (percent_max <= 0.5)
@ -1274,7 +1292,7 @@ static void print_summary(struct rb_root *root, const char *filename)
src_line = rb_entry(node, struct source_line, node);
for (i = 0; i < src_line->nr_pcnt; i++) {
percent = src_line->p[i].percent_sum;
percent = src_line->samples[i].percent_sum;
color = get_percent_color(percent);
color_fprintf(stdout, color, " %7.2f", percent);

7
tools/perf/util/annotate.h
View File

@ -72,23 +72,24 @@ struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disa
int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw);
size_t disasm__fprintf(struct list_head *head, FILE *fp);
double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
s64 end, const char **path);
s64 end, const char **path, u64 *nr_samples);
struct sym_hist {
u64 sum;
u64 addr[0];
};
struct source_line_percent {
struct source_line_samples {
double percent;
double percent_sum;
double nr;
};
struct source_line {
struct rb_node node;
char *path;
int nr_pcnt;
struct source_line_percent p[1];
struct source_line_samples samples[1];
};
/** struct annotated_source - symbols with hits have this attached as in sannotation

46
tools/perf/util/event.c
View File

@ -218,10 +218,14 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
pid_t pid, pid_t tgid,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data)
bool mmap_data,
unsigned int proc_map_timeout)
{
char filename[PATH_MAX];
FILE *fp;
unsigned long long t;
bool truncation = false;
unsigned long long timeout = proc_map_timeout * 1000000ULL;
int rc = 0;
if (machine__is_default_guest(machine))
@ -240,6 +244,7 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
}
event->header.type = PERF_RECORD_MMAP2;
t = rdclock();
while (1) {
char bf[BUFSIZ];
@ -253,6 +258,15 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
if (fgets(bf, sizeof(bf), fp) == NULL)
break;
if ((rdclock() - t) > timeout) {
pr_warning("Reading %s time out. "
"You may want to increase "
"the time limit by --proc-map-timeout\n",
filename);
truncation = true;
goto out;
}
/* ensure null termination since stack will be reused. */
strcpy(execname, "");
@ -301,6 +315,10 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
}
out:
if (truncation)
event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
if (!strcmp(execname, ""))
strcpy(execname, anonstr);
@ -319,6 +337,9 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
rc = -1;
break;
}
if (truncation)
break;
}
fclose(fp);
@ -386,7 +407,9 @@ static int __event__synthesize_thread(union perf_event *comm_event,
pid_t pid, int full,
perf_event__handler_t process,
struct perf_tool *tool,
struct machine *machine, bool mmap_data)
struct machine *machine,
bool mmap_data,
unsigned int proc_map_timeout)
{
char filename[PATH_MAX];
DIR *tasks;
@ -403,7 +426,8 @@ static int __event__synthesize_thread(union perf_event *comm_event,
return -1;
return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
process, machine, mmap_data);
process, machine, mmap_data,
proc_map_timeout);
}
if (machine__is_default_guest(machine))
@ -444,7 +468,7 @@ static int __event__synthesize_thread(union perf_event *comm_event,
if (_pid == pid) {
/* process the parent's maps too */
rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
process, machine, mmap_data);
process, machine, mmap_data, proc_map_timeout);
if (rc)
break;
}
@ -458,7 +482,8 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
struct thread_map *threads,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data)
bool mmap_data,
unsigned int proc_map_timeout)
{
union perf_event *comm_event, *mmap_event, *fork_event;
int err = -1, thread, j;
@ -481,7 +506,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
fork_event,
threads->map[thread], 0,
process, tool, machine,
mmap_data)) {
mmap_data, proc_map_timeout)) {
err = -1;
break;
}
@ -507,7 +532,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
fork_event,
comm_event->comm.pid, 0,
process, tool, machine,
mmap_data)) {
mmap_data, proc_map_timeout)) {
err = -1;
break;
}
@ -524,7 +549,9 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
int perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine, bool mmap_data)
struct machine *machine,
bool mmap_data,
unsigned int proc_map_timeout)
{
DIR *proc;
char proc_path[PATH_MAX];
@ -564,7 +591,8 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
* one thread couldn't be synthesized.
*/
__event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
1, process, tool, machine, mmap_data);
1, process, tool, machine, mmap_data,
proc_map_timeout);
}
err = 0;

10
tools/perf/util/event.h
View File

@ -265,6 +265,7 @@ struct events_stats {
u32 nr_unknown_id;
u32 nr_unprocessable_samples;
u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX];
u32 nr_proc_map_timeout;
};
struct attr_event {
@ -383,10 +384,12 @@ typedef int (*perf_event__handler_t)(struct perf_tool *tool,
int perf_event__synthesize_thread_map(struct perf_tool *tool,
struct thread_map *threads,
perf_event__handler_t process,
struct machine *machine, bool mmap_data);
struct machine *machine, bool mmap_data,
unsigned int proc_map_timeout);
int perf_event__synthesize_threads(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine, bool mmap_data);
struct machine *machine, bool mmap_data,
unsigned int proc_map_timeout);
int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine);
@ -468,7 +471,8 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
pid_t pid, pid_t tgid,
perf_event__handler_t process,
struct machine *machine,
bool mmap_data);
bool mmap_data,
unsigned int proc_map_timeout);
size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp);

28
tools/perf/util/machine.c
View File

@ -1890,14 +1890,36 @@ int machine__for_each_thread(struct machine *machine,
return rc;
}
int machines__for_each_thread(struct machines *machines,
int (*fn)(struct thread *thread, void *p),
void *priv)
{
struct rb_node *nd;
int rc = 0;
rc = machine__for_each_thread(&machines->host, fn, priv);
if (rc != 0)
return rc;
for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
struct machine *machine = rb_entry(nd, struct machine, rb_node);
rc = machine__for_each_thread(machine, fn, priv);
if (rc != 0)
return rc;
}
return rc;
}
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
struct target *target, struct thread_map *threads,
perf_event__handler_t process, bool data_mmap)
perf_event__handler_t process, bool data_mmap,
unsigned int proc_map_timeout)
{
if (target__has_task(target))
return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout);
else if (target__has_cpu(target))
return perf_event__synthesize_threads(tool, process, machine, data_mmap);
return perf_event__synthesize_threads(tool, process, machine, data_mmap, proc_map_timeout);
/* command specified */
return 0;
}

12
tools/perf/util/machine.h
View File

@ -216,16 +216,22 @@ size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);
int machine__for_each_thread(struct machine *machine,
int (*fn)(struct thread *thread, void *p),
void *priv);
int machines__for_each_thread(struct machines *machines,
int (*fn)(struct thread *thread, void *p),
void *priv);
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
struct target *target, struct thread_map *threads,
perf_event__handler_t process, bool data_mmap);
perf_event__handler_t process, bool data_mmap,
unsigned int proc_map_timeout);
static inline
int machine__synthesize_threads(struct machine *machine, struct target *target,
struct thread_map *threads, bool data_mmap)
struct thread_map *threads, bool data_mmap,
unsigned int proc_map_timeout)
{
return __machine__synthesize_threads(machine, NULL, target, threads,
perf_event__process, data_mmap);
perf_event__process, data_mmap,
proc_map_timeout);
}
pid_t machine__get_current_tid(struct machine *machine, int cpu);

33
tools/perf/util/session.c
View File

@ -16,6 +16,7 @@
#include "perf_regs.h"
#include "asm/bug.h"
#include "auxtrace.h"
#include "thread-stack.h"
static int perf_session__deliver_event(struct perf_session *session,
union perf_event *event,
@ -1063,6 +1064,8 @@ static int machines__deliver_event(struct machines *machines,
case PERF_RECORD_MMAP:
return tool->mmap(tool, event, sample, machine);
case PERF_RECORD_MMAP2:
if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
++evlist->stats.nr_proc_map_timeout;
return tool->mmap2(tool, event, sample, machine);
case PERF_RECORD_COMM:
return tool->comm(tool, event, sample, machine);
@ -1359,6 +1362,30 @@ static void perf_session__warn_about_errors(const struct perf_session *session)
ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
events_stats__auxtrace_error_warn(stats);
if (stats->nr_proc_map_timeout != 0) {
ui__warning("%d map information files for pre-existing threads were\n"
"not processed, if there are samples for addresses they\n"
"will not be resolved, you may find out which are these\n"
"threads by running with -v and redirecting the output\n"
"to a file.\n"
"The time limit to process proc map is too short?\n"
"Increase it by --proc-map-timeout\n",
stats->nr_proc_map_timeout);
}
}
static int perf_session__flush_thread_stack(struct thread *thread,
void *p __maybe_unused)
{
return thread_stack__flush(thread);
}
static int perf_session__flush_thread_stacks(struct perf_session *session)
{
return machines__for_each_thread(&session->machines,
perf_session__flush_thread_stack,
NULL);
}
volatile int session_done;
@ -1450,6 +1477,9 @@ static int __perf_session__process_pipe_events(struct perf_session *session)
if (err)
goto out_err;
err = auxtrace__flush_events(session, tool);
if (err)
goto out_err;
err = perf_session__flush_thread_stacks(session);
out_err:
free(buf);
perf_session__warn_about_errors(session);
@ -1600,6 +1630,9 @@ static int __perf_session__process_events(struct perf_session *session,
if (err)
goto out_err;
err = auxtrace__flush_events(session, tool);
if (err)
goto out_err;
err = perf_session__flush_thread_stacks(session);
out_err:
ui_progress__finish();
perf_session__warn_about_errors(session);

8
tools/perf/util/sort.c
View File

@ -182,18 +182,16 @@ static int64_t _sort__addr_cmp(u64 left_ip, u64 right_ip)
static int64_t _sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r)
{
u64 ip_l, ip_r;
if (!sym_l || !sym_r)
return cmp_null(sym_l, sym_r);
if (sym_l == sym_r)
return 0;
ip_l = sym_l->start;
ip_r = sym_r->start;
if (sym_l->start != sym_r->start)
return (int64_t)(sym_r->start - sym_l->start);
return (int64_t)(ip_r - ip_l);
return (int64_t)(sym_r->end - sym_l->end);
}
static int64_t

18
tools/perf/util/thread-stack.c
View File

@ -219,7 +219,7 @@ static int thread_stack__call_return(struct thread *thread,
return crp->process(&cr, crp->data);
}
static int thread_stack__flush(struct thread *thread, struct thread_stack *ts)
static int __thread_stack__flush(struct thread *thread, struct thread_stack *ts)
{
struct call_return_processor *crp = ts->crp;
int err;
@ -242,6 +242,14 @@ static int thread_stack__flush(struct thread *thread, struct thread_stack *ts)
return 0;
}
int thread_stack__flush(struct thread *thread)
{
if (thread->ts)
return __thread_stack__flush(thread, thread->ts);
return 0;
}
int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip,
u64 to_ip, u16 insn_len, u64 trace_nr)
{
@ -264,7 +272,7 @@ int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip,
*/
if (trace_nr != thread->ts->trace_nr) {
if (thread->ts->trace_nr)
thread_stack__flush(thread, thread->ts);
__thread_stack__flush(thread, thread->ts);
thread->ts->trace_nr = trace_nr;
}
@ -297,7 +305,7 @@ void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr)
if (trace_nr != thread->ts->trace_nr) {
if (thread->ts->trace_nr)
thread_stack__flush(thread, thread->ts);
__thread_stack__flush(thread, thread->ts);
thread->ts->trace_nr = trace_nr;
}
}
@ -305,7 +313,7 @@ void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr)
void thread_stack__free(struct thread *thread)
{
if (thread->ts) {
thread_stack__flush(thread, thread->ts);
__thread_stack__flush(thread, thread->ts);
zfree(&thread->ts->stack);
zfree(&thread->ts);
}
@ -689,7 +697,7 @@ int thread_stack__process(struct thread *thread, struct comm *comm,
/* Flush stack on exec */
if (ts->comm != comm && thread->pid_ == thread->tid) {
err = thread_stack__flush(thread, ts);
err = __thread_stack__flush(thread, ts);
if (err)
return err;
ts->comm = comm;

1
tools/perf/util/thread-stack.h
View File

@ -96,6 +96,7 @@ int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip,
void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr);
void thread_stack__sample(struct thread *thread, struct ip_callchain *chain,
size_t sz, u64 ip);
int thread_stack__flush(struct thread *thread);
void thread_stack__free(struct thread *thread);
struct call_return_processor *