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perf/core improvements and fixes: 

User visible:
 
 - Add --ldlat option to 'perf mem' to specify load latency for loads
   event (e.g. cpu/mem-loads/ ) (Jiri Olsa)
 
 Build fixes:
 
 - Fix libunwind related compile error for static cross build (He Kuang)
 
 Infrastructure:
 
 - UI refactorings to support headers with multiple lines, non-evsel
   hists browsers, toggle showing callchains, etc (Jiri Olsa)
 
 - More prep work for caching probe definitions, paving the way
   for supporting SDT (Statically Defined Traces) userspace probes (Masami Hiramatsu)
 
 - Handle NULL at perf_config_set__delete() (Taeung Song)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-20160615' 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:

- Add --ldlat option to 'perf mem' to specify load latency for loads
  event (e.g. cpu/mem-loads/ ) (Jiri Olsa)

Build fixes:

- Fix libunwind related compile error for static cross build (He Kuang)

Infrastructure changes:

- UI refactorings to support headers with multiple lines, non-evsel
  hists browsers, toggle showing callchains, etc (Jiri Olsa)

- More prep work for caching probe definitions, paving the way
  for supporting SDT (Statically Defined Traces) userspace probes (Masami Hiramatsu)

- Handle NULL at perf_config_set__delete() (Taeung Song)

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 2016-06-16 10:27:35 +02:00
parent 2c95afc1e8 2fd457a345
commit 02469a9509
25 changed files with 640 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
tools/perf/Documentation/perf-mem.txt
View File

@ -56,6 +56,9 @@ OPTIONS
--all-user::
Configure all used events to run in user space.
--ldload::
Specify desired latency for loads event.
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-report[1]

4
tools/perf/Documentation/perf-probe.txt
View File

@ -109,6 +109,10 @@ OPTIONS
Dry run. With this option, --add and --del doesn't execute actual
adding and removal operations.
--cache::
Cache the probes (with --add option). Any events which successfully added
are also stored in the cache file.
--max-probes=NUM::
Set the maximum number of probe points for an event. Default is 128.

7
tools/perf/builtin-diff.c
View File

@ -666,7 +666,8 @@ static void hists__process(struct hists *hists)
hists__precompute(hists);
hists__output_resort(hists, NULL);
hists__fprintf(hists, true, 0, 0, 0, stdout);
hists__fprintf(hists, true, 0, 0, 0, stdout,
symbol_conf.use_callchain);
}
static void data__fprintf(void)
@ -1044,7 +1045,7 @@ static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
}
static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel __maybe_unused)
struct hists *hists __maybe_unused)
{
struct diff_hpp_fmt *dfmt =
container_of(fmt, struct diff_hpp_fmt, fmt);
@ -1055,7 +1056,7 @@ static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
static int hpp__width(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp __maybe_unused,
struct perf_evsel *evsel __maybe_unused)
struct hists *hists __maybe_unused)
{
struct diff_hpp_fmt *dfmt =
container_of(fmt, struct diff_hpp_fmt, fmt);

1
tools/perf/builtin-mem.c
View File

@ -67,6 +67,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
OPT_CALLBACK('e', "event", &mem, "event",
"event selector. use 'perf mem record -e list' to list available events",
parse_record_events),
OPT_UINTEGER(0, "ldlat", &perf_mem_events__loads_ldlat, "mem-loads latency"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_BOOLEAN('U', "--all-user", &all_user, "collect only user level data"),

1
tools/perf/builtin-probe.c
View File

@ -512,6 +512,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
"Enable symbol demangling"),
OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
"Enable kernel symbol demangling"),
OPT_BOOLEAN(0, "cache", &probe_conf.cache, "Manipulate probe cache"),
OPT_END()
};
int ret;

3
tools/perf/builtin-report.c
View File

@ -370,7 +370,8 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
continue;
hists__fprintf_nr_sample_events(hists, rep, evname, stdout);
hists__fprintf(hists, true, 0, 0, rep->min_percent, stdout);
hists__fprintf(hists, true, 0, 0, rep->min_percent, stdout,
symbol_conf.use_callchain);
fprintf(stdout, "\n\n");
}

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

@ -295,7 +295,7 @@ static void perf_top__print_sym_table(struct perf_top *top)
hists__output_recalc_col_len(hists, top->print_entries - printed);
putchar('\n');
hists__fprintf(hists, false, top->print_entries - printed, win_width,
top->min_percent, stdout);
top->min_percent, stdout, symbol_conf.use_callchain);
}
static void prompt_integer(int *target, const char *msg)

3
tools/perf/config/Makefile
View File

@ -365,6 +365,7 @@ ifndef NO_LIBUNWIND
$(call detected,CONFIG_LIBUNWIND_X86)
CFLAGS += -DHAVE_LIBUNWIND_X86_SUPPORT
LDFLAGS += -lunwind-x86
EXTLIBS_LIBUNWIND += -lunwind-x86
have_libunwind = 1
endif
@ -372,6 +373,7 @@ ifndef NO_LIBUNWIND
$(call detected,CONFIG_LIBUNWIND_AARCH64)
CFLAGS += -DHAVE_LIBUNWIND_AARCH64_SUPPORT
LDFLAGS += -lunwind-aarch64
EXTLIBS_LIBUNWIND += -lunwind-aarch64
have_libunwind = 1
$(call feature_check,libunwind-debug-frame-aarch64)
ifneq ($(feature-libunwind-debug-frame-aarch64), 1)
@ -449,6 +451,7 @@ ifndef NO_LIBUNWIND
CFLAGS += -DHAVE_LIBUNWIND_SUPPORT
CFLAGS += $(LIBUNWIND_CFLAGS)
LDFLAGS += $(LIBUNWIND_LDFLAGS)
EXTLIBS += $(EXTLIBS_LIBUNWIND)
endif
ifndef NO_LIBAUDIT

39
tools/perf/ui/browsers/hists.c
View File

@ -1470,7 +1470,7 @@ static int hist_browser__show_no_entry(struct hist_browser *browser,
column++ < browser->b.horiz_scroll)
continue;
ret = fmt->width(fmt, NULL, hists_to_evsel(browser->hists));
ret = fmt->width(fmt, NULL, browser->hists);
if (first) {
/* for folded sign */
@ -1531,7 +1531,7 @@ static int hists_browser__scnprintf_headers(struct hist_browser *browser, char *
if (perf_hpp__should_skip(fmt, hists) || column++ < browser->b.horiz_scroll)
continue;
ret = fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
ret = fmt->header(fmt, &dummy_hpp, hists);
if (advance_hpp_check(&dummy_hpp, ret))
break;
@ -1568,7 +1568,7 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
if (column++ < browser->b.horiz_scroll)
continue;
ret = fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
ret = fmt->header(fmt, &dummy_hpp, hists);
if (advance_hpp_check(&dummy_hpp, ret))
break;
@ -1605,7 +1605,7 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
}
first_col = false;
ret = fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
ret = fmt->header(fmt, &dummy_hpp, hists);
dummy_hpp.buf[ret] = '\0';
start = trim(dummy_hpp.buf);
@ -1622,21 +1622,38 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
return ret;
}
static void hist_browser__show_headers(struct hist_browser *browser)
static void hists_browser__hierarchy_headers(struct hist_browser *browser)
{
char headers[1024];
if (symbol_conf.report_hierarchy)
hists_browser__scnprintf_hierarchy_headers(browser, headers,
sizeof(headers));
else
hists_browser__scnprintf_headers(browser, headers,
sizeof(headers));
hists_browser__scnprintf_hierarchy_headers(browser, headers,
sizeof(headers));
ui_browser__gotorc(&browser->b, 0, 0);
ui_browser__set_color(&browser->b, HE_COLORSET_ROOT);
ui_browser__write_nstring(&browser->b, headers, browser->b.width + 1);
}
static void hists_browser__headers(struct hist_browser *browser)
{
char headers[1024];
hists_browser__scnprintf_headers(browser, headers,
sizeof(headers));
ui_browser__gotorc(&browser->b, 0, 0);
ui_browser__set_color(&browser->b, HE_COLORSET_ROOT);
ui_browser__write_nstring(&browser->b, headers, browser->b.width + 1);
}
static void hist_browser__show_headers(struct hist_browser *browser)
{
if (symbol_conf.report_hierarchy)
hists_browser__hierarchy_headers(browser);
else
hists_browser__headers(browser);
}
static void ui_browser__hists_init_top(struct ui_browser *browser)
{
if (browser->top == NULL) {

2
tools/perf/ui/gtk/hists.c
View File

@ -549,7 +549,7 @@ static void perf_gtk__show_hierarchy(GtkWidget *window, struct hists *hists,
strcat(buf, "+");
first_col = false;
fmt->header(fmt, &hpp, hists_to_evsel(hists));
fmt->header(fmt, &hpp, hists);
strcat(buf, ltrim(rtrim(hpp.buf)));
}
}

11
tools/perf/ui/hist.c
View File

@ -215,9 +215,10 @@ static int __hpp__sort_acc(struct hist_entry *a, struct hist_entry *b,
static int hpp__width_fn(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp __maybe_unused,
struct perf_evsel *evsel)
struct hists *hists)
{
int len = fmt->user_len ?: fmt->len;
struct perf_evsel *evsel = hists_to_evsel(hists);
if (symbol_conf.event_group)
len = max(len, evsel->nr_members * fmt->len);
@ -229,9 +230,9 @@ static int hpp__width_fn(struct perf_hpp_fmt *fmt,
}
static int hpp__header_fn(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel)
struct hists *hists)
{
int len = hpp__width_fn(fmt, hpp, evsel);
int len = hpp__width_fn(fmt, hpp, hists);
return scnprintf(hpp->buf, hpp->size, "%*s", len, fmt->name);
}
@ -632,7 +633,7 @@ unsigned int hists__sort_list_width(struct hists *hists)
else
ret += 2;
ret += fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
ret += fmt->width(fmt, &dummy_hpp, hists);
}
if (verbose && hists__has(hists, sym)) /* Addr + origin */
@ -657,7 +658,7 @@ unsigned int hists__overhead_width(struct hists *hists)
else
ret += 2;
ret += fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
ret += fmt->width(fmt, &dummy_hpp, hists);
}
return ret;

133
tools/perf/ui/stdio/hist.c
View File

@ -492,14 +492,15 @@ out:
}
static int hist_entry__fprintf(struct hist_entry *he, size_t size,
struct hists *hists,
char *bf, size_t bfsz, FILE *fp)
char *bf, size_t bfsz, FILE *fp,
bool use_callchain)
{
int ret;
struct perf_hpp hpp = {
.buf = bf,
.size = size,
};
struct hists *hists = he->hists;
u64 total_period = hists->stats.total_period;
if (size == 0 || size > bfsz)
@ -512,7 +513,7 @@ static int hist_entry__fprintf(struct hist_entry *he, size_t size,
ret = fprintf(fp, "%s\n", bf);
if (symbol_conf.use_callchain)
if (use_callchain)
ret += hist_entry_callchain__fprintf(he, total_period, 0, fp);
return ret;
@ -548,7 +549,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
struct perf_hpp_list_node, list);
perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
fmt->header(fmt, hpp, hists_to_evsel(hists));
fmt->header(fmt, hpp, hists);
fprintf(fp, "%s%s", hpp->buf, sep ?: " ");
}
@ -568,7 +569,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
header_width += fprintf(fp, "+");
first_col = false;
fmt->header(fmt, hpp, hists_to_evsel(hists));
fmt->header(fmt, hpp, hists);
header_width += fprintf(fp, "%s", trim(hpp->buf));
}
@ -589,7 +590,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
fprintf(fp, "%s", sep ?: "..");
first_col = false;
width = fmt->width(fmt, hpp, hists_to_evsel(hists));
width = fmt->width(fmt, hpp, hists);
fprintf(fp, "%.*s", width, dots);
}
@ -606,7 +607,7 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
width++; /* for '+' sign between column header */
first_col = false;
width += fmt->width(fmt, hpp, hists_to_evsel(hists));
width += fmt->width(fmt, hpp, hists);
}
if (width > header_width)
@ -622,47 +623,31 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
return 2;
}
size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
int max_cols, float min_pcnt, FILE *fp)
static int
hists__fprintf_hierarchy_headers(struct hists *hists,
struct perf_hpp *hpp,
FILE *fp)
{
struct perf_hpp_list_node *fmt_node;
struct perf_hpp_fmt *fmt;
list_for_each_entry(fmt_node, &hists->hpp_formats, list) {
perf_hpp_list__for_each_format(&fmt_node->hpp, fmt)
perf_hpp__reset_width(fmt, hists);
}
return print_hierarchy_header(hists, hpp, symbol_conf.field_sep, fp);
}
static int
hists__fprintf_standard_headers(struct hists *hists,
struct perf_hpp *hpp,
FILE *fp)
{
struct perf_hpp_fmt *fmt;
struct perf_hpp_list_node *fmt_node;
struct rb_node *nd;
size_t ret = 0;
unsigned int width;
const char *sep = symbol_conf.field_sep;
int nr_rows = 0;
char bf[96];
struct perf_hpp dummy_hpp = {
.buf = bf,
.size = sizeof(bf),
};
bool first = true;
size_t linesz;
char *line = NULL;
unsigned indent;
init_rem_hits();
hists__for_each_format(hists, fmt)
perf_hpp__reset_width(fmt, hists);
if (symbol_conf.col_width_list_str)
perf_hpp__set_user_width(symbol_conf.col_width_list_str);
if (!show_header)
goto print_entries;
fprintf(fp, "# ");
if (symbol_conf.report_hierarchy) {
list_for_each_entry(fmt_node, &hists->hpp_formats, list) {
perf_hpp_list__for_each_format(&fmt_node->hpp, fmt)
perf_hpp__reset_width(fmt, hists);
}
nr_rows += print_hierarchy_header(hists, &dummy_hpp, sep, fp);
goto print_entries;
}
hists__for_each_format(hists, fmt) {
if (perf_hpp__should_skip(fmt, hists))
@ -673,16 +658,14 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
else
first = false;
fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
fprintf(fp, "%s", bf);
fmt->header(fmt, hpp, hists);
fprintf(fp, "%s", hpp->buf);
}
fprintf(fp, "\n");
if (max_rows && ++nr_rows >= max_rows)
goto out;
if (sep)
goto print_entries;
return 1;
first = true;
@ -699,20 +682,60 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
else
first = false;
width = fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
width = fmt->width(fmt, hpp, hists);
for (i = 0; i < width; i++)
fprintf(fp, ".");
}
fprintf(fp, "\n");
if (max_rows && ++nr_rows >= max_rows)
goto out;
fprintf(fp, "#\n");
if (max_rows && ++nr_rows >= max_rows)
return 3;
}
static int hists__fprintf_headers(struct hists *hists, FILE *fp)
{
char bf[96];
struct perf_hpp dummy_hpp = {
.buf = bf,
.size = sizeof(bf),
};
fprintf(fp, "# ");
if (symbol_conf.report_hierarchy)
return hists__fprintf_hierarchy_headers(hists, &dummy_hpp, fp);
else
return hists__fprintf_standard_headers(hists, &dummy_hpp, fp);
}
size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
int max_cols, float min_pcnt, FILE *fp,
bool use_callchain)
{
struct perf_hpp_fmt *fmt;
struct rb_node *nd;
size_t ret = 0;
const char *sep = symbol_conf.field_sep;
int nr_rows = 0;
size_t linesz;
char *line = NULL;
unsigned indent;
init_rem_hits();
hists__for_each_format(hists, fmt)
perf_hpp__reset_width(fmt, hists);
if (symbol_conf.col_width_list_str)
perf_hpp__set_user_width(symbol_conf.col_width_list_str);
if (show_header)
nr_rows += hists__fprintf_headers(hists, fp);
if (max_rows && nr_rows >= max_rows)
goto out;
print_entries:
linesz = hists__sort_list_width(hists) + 3 + 1;
linesz += perf_hpp__color_overhead();
line = malloc(linesz);
@ -734,7 +757,7 @@ print_entries:
if (percent < min_pcnt)
continue;
ret += hist_entry__fprintf(h, max_cols, hists, line, linesz, fp);
ret += hist_entry__fprintf(h, max_cols, line, linesz, fp, use_callchain);
if (max_rows && ++nr_rows >= max_rows)
break;

12
tools/perf/util/build-id.c
View File

@ -387,9 +387,8 @@ void disable_buildid_cache(void)
no_buildid_cache = true;
}
static char *build_id_cache__dirname_from_path(const char *name,
bool is_kallsyms, bool is_vdso,
const char *sbuild_id)
char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
bool is_kallsyms, bool is_vdso)
{
char *realname = (char *)name, *filename;
bool slash = is_kallsyms || is_vdso;
@ -417,8 +416,7 @@ int build_id_cache__list_build_ids(const char *pathname,
char *dir_name;
int ret = 0;
dir_name = build_id_cache__dirname_from_path(pathname, false, false,
NULL);
dir_name = build_id_cache__cachedir(NULL, pathname, false, false);
if (!dir_name)
return -ENOMEM;
@ -444,8 +442,8 @@ int build_id_cache__add_s(const char *sbuild_id, const char *name,
goto out_free;
}
dir_name = build_id_cache__dirname_from_path(name, is_kallsyms,
is_vdso, sbuild_id);
dir_name = build_id_cache__cachedir(sbuild_id, name,
is_kallsyms, is_vdso);
if (!dir_name)
goto out_free;

2
tools/perf/util/build-id.h
View File

@ -30,6 +30,8 @@ bool perf_session__read_build_ids(struct perf_session *session, bool with_hits);
int perf_session__write_buildid_table(struct perf_session *session, int fd);
int perf_session__cache_build_ids(struct perf_session *session);
char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
bool is_kallsyms, bool is_vdso);
int build_id_cache__list_build_ids(const char *pathname,
struct strlist **result);
bool build_id_cache__cached(const char *sbuild_id);

3
tools/perf/util/config.c
View File

@ -742,6 +742,9 @@ static void perf_config_set__purge(struct perf_config_set *set)
void perf_config_set__delete(struct perf_config_set *set)
{
if (set == NULL)
return;
perf_config_set__purge(set);
free(set);
}

2
tools/perf/util/hist.c
View File

@ -1081,7 +1081,7 @@ int hist_entry__snprintf_alignment(struct hist_entry *he, struct perf_hpp *hpp,
struct perf_hpp_fmt *fmt, int printed)
{
if (!list_is_last(&fmt->list, &he->hists->hpp_list->fields)) {
const int width = fmt->width(fmt, hpp, hists_to_evsel(he->hists));
const int width = fmt->width(fmt, hpp, he->hists);
if (printed < width) {
advance_hpp(hpp, printed);
printed = scnprintf(hpp->buf, hpp->size, "%-*s", width - printed, " ");

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

@ -159,7 +159,8 @@ void events_stats__inc(struct events_stats *stats, u32 type);
size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);
size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
int max_cols, float min_pcnt, FILE *fp);
int max_cols, float min_pcnt, FILE *fp,
bool use_callchain);
size_t perf_evlist__fprintf_nr_events(struct perf_evlist *evlist, FILE *fp);
void hists__filter_by_dso(struct hists *hists);
@ -214,9 +215,9 @@ struct perf_hpp {
struct perf_hpp_fmt {
const char *name;
int (*header)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel);
struct hists *hists);
int (*width)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel);
struct hists *hists);
int (*color)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct hist_entry *he);
int (*entry)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,

17
tools/perf/util/mem-events.c
View File

@ -10,18 +10,33 @@
#include "debug.h"
#include "symbol.h"
unsigned int perf_mem_events__loads_ldlat = 30;
#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
E("ldlat-loads", "cpu/mem-loads,ldlat=30/P", "mem-loads"),
E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "mem-loads"),
E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"),
};
#undef E
#undef E
static char mem_loads_name[100];
static bool mem_loads_name__init;
char *perf_mem_events__name(int i)
{
if (i == PERF_MEM_EVENTS__LOAD) {
if (!mem_loads_name__init) {
mem_loads_name__init = true;
scnprintf(mem_loads_name, sizeof(mem_loads_name),
perf_mem_events[i].name,
perf_mem_events__loads_ldlat);
}
return mem_loads_name;
}
return (char *)perf_mem_events[i].name;
}

1
tools/perf/util/mem-events.h
View File

@ -18,6 +18,7 @@ enum {
};
extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
extern unsigned int perf_mem_events__loads_ldlat;
int perf_mem_events__parse(const char *str);
int perf_mem_events__init(void);

128
tools/perf/util/probe-event.c
View File

@ -67,7 +67,6 @@ int e_snprintf(char *str, size_t size, const char *format, ...)
return ret;
}
static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
static struct machine *host_machine;
/* Initialize symbol maps and path of vmlinux/modules */
@ -1603,6 +1602,10 @@ int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev)
p = strchr(argv[1], ':');
if (p) {
tp->module = strndup(argv[1], p - argv[1]);
if (!tp->module) {
ret = -ENOMEM;
goto out;
}
p++;
} else
p = argv[1];
@ -1712,7 +1715,7 @@ out:
}
/* Compose only probe point (not argument) */
static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
char *synthesize_perf_probe_point(struct perf_probe_point *pp)
{
struct strbuf buf;
char *tmp, *ret = NULL;
@ -1751,30 +1754,36 @@ out:
return ret;
}
#if 0
char *synthesize_perf_probe_command(struct perf_probe_event *pev)
{
char *buf;
int i, len, ret;
struct strbuf buf;
char *tmp, *ret = NULL;
int i;
buf = synthesize_perf_probe_point(&pev->point);
if (!buf)
if (strbuf_init(&buf, 64))
return NULL;
if (pev->event)
if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
pev->event) < 0)
goto out;
tmp = synthesize_perf_probe_point(&pev->point);
if (!tmp || strbuf_addstr(&buf, tmp) < 0)
goto out;
free(tmp);
len = strlen(buf);
for (i = 0; i < pev->nargs; i++) {
ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
pev->args[i].name);
if (ret <= 0) {
free(buf);
return NULL;
}
len += ret;
tmp = synthesize_perf_probe_arg(pev->args + i);
if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
goto out;
free(tmp);
}
return buf;
ret = strbuf_detach(&buf, NULL);
out:
strbuf_release(&buf);
return ret;
}
#endif
static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
struct strbuf *buf, int depth)
@ -2026,6 +2035,79 @@ void clear_perf_probe_event(struct perf_probe_event *pev)
memset(pev, 0, sizeof(*pev));
}
#define strdup_or_goto(str, label) \
({ char *__p = NULL; if (str && !(__p = strdup(str))) goto label; __p; })
static int perf_probe_point__copy(struct perf_probe_point *dst,
struct perf_probe_point *src)
{
dst->file = strdup_or_goto(src->file, out_err);
dst->function = strdup_or_goto(src->function, out_err);
dst->lazy_line = strdup_or_goto(src->lazy_line, out_err);
dst->line = src->line;
dst->retprobe = src->retprobe;
dst->offset = src->offset;
return 0;
out_err:
clear_perf_probe_point(dst);
return -ENOMEM;
}
static int perf_probe_arg__copy(struct perf_probe_arg *dst,
struct perf_probe_arg *src)
{
struct perf_probe_arg_field *field, **ppfield;
dst->name = strdup_or_goto(src->name, out_err);
dst->var = strdup_or_goto(src->var, out_err);
dst->type = strdup_or_goto(src->type, out_err);
field = src->field;
ppfield = &(dst->field);
while (field) {
*ppfield = zalloc(sizeof(*field));
if (!*ppfield)
goto out_err;
(*ppfield)->name = strdup_or_goto(field->name, out_err);
(*ppfield)->index = field->index;
(*ppfield)->ref = field->ref;
field = field->next;
ppfield = &((*ppfield)->next);
}
return 0;
out_err:
return -ENOMEM;
}
int perf_probe_event__copy(struct perf_probe_event *dst,
struct perf_probe_event *src)
{
int i;
dst->event = strdup_or_goto(src->event, out_err);
dst->group = strdup_or_goto(src->group, out_err);
dst->target = strdup_or_goto(src->target, out_err);
dst->uprobes = src->uprobes;
if (perf_probe_point__copy(&dst->point, &src->point) < 0)
goto out_err;
dst->args = zalloc(sizeof(struct perf_probe_arg) * src->nargs);
if (!dst->args)
goto out_err;
dst->nargs = src->nargs;
for (i = 0; i < src->nargs; i++)
if (perf_probe_arg__copy(&dst->args[i], &src->args[i]) < 0)
goto out_err;
return 0;
out_err:
clear_perf_probe_event(dst);
return -ENOMEM;
}
void clear_probe_trace_event(struct probe_trace_event *tev)
{
struct probe_trace_arg_ref *ref, *next;
@ -2432,6 +2514,7 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
{
int i, fd, ret;
struct probe_trace_event *tev = NULL;
struct probe_cache *cache = NULL;
struct strlist *namelist;
fd = probe_file__open(PF_FL_RW | (pev->uprobes ? PF_FL_UPROBE : 0));
@ -2473,6 +2556,14 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
}
if (ret == -EINVAL && pev->uprobes)
warn_uprobe_event_compat(tev);
if (ret == 0 && probe_conf.cache) {
cache = probe_cache__new(pev->target);
if (!cache ||
probe_cache__add_entry(cache, pev, tevs, ntevs) < 0 ||
probe_cache__commit(cache) < 0)
pr_warning("Failed to add event to probe cache\n");
probe_cache__delete(cache);
}
strlist__delete(namelist);
close_out:
@ -2501,9 +2592,6 @@ static int find_probe_functions(struct map *map, char *name,
return found;
}
#define strdup_or_goto(str, label) \
({ char *__p = strdup(str); if (!__p) goto label; __p; })
void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
struct probe_trace_event *tev __maybe_unused,
struct map *map __maybe_unused,

5
tools/perf/util/probe-event.h
View File

@ -12,6 +12,7 @@ struct probe_conf {
bool show_location_range;
bool force_add;
bool no_inlines;
bool cache;
int max_probes;
};
extern struct probe_conf probe_conf;
@ -121,6 +122,10 @@ int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev);
char *synthesize_perf_probe_command(struct perf_probe_event *pev);
char *synthesize_probe_trace_command(struct probe_trace_event *tev);
char *synthesize_perf_probe_arg(struct perf_probe_arg *pa);
char *synthesize_perf_probe_point(struct perf_probe_point *pp);
int perf_probe_event__copy(struct perf_probe_event *dst,
struct perf_probe_event *src);
/* Check the perf_probe_event needs debuginfo */
bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);

331
tools/perf/util/probe-file.c
View File

@ -14,6 +14,7 @@
* GNU General Public License for more details.
*
*/
#include <sys/uio.h>
#include "util.h"
#include "event.h"
#include "strlist.h"
@ -324,3 +325,333 @@ int probe_file__del_events(int fd, struct strfilter *filter)
return ret;
}
/* Caller must ensure to remove this entry from list */
static void probe_cache_entry__delete(struct probe_cache_entry *entry)
{
if (entry) {
BUG_ON(!list_empty(&entry->node));
strlist__delete(entry->tevlist);
clear_perf_probe_event(&entry->pev);
zfree(&entry->spev);
free(entry);
}
}
static struct probe_cache_entry *
probe_cache_entry__new(struct perf_probe_event *pev)
{
struct probe_cache_entry *entry = zalloc(sizeof(*entry));
if (entry) {
INIT_LIST_HEAD(&entry->node);
entry->tevlist = strlist__new(NULL, NULL);
if (!entry->tevlist)
zfree(&entry);
else if (pev) {
entry->spev = synthesize_perf_probe_command(pev);
if (!entry->spev ||
perf_probe_event__copy(&entry->pev, pev) < 0) {
probe_cache_entry__delete(entry);
return NULL;
}
}
}
return entry;
}
/* For the kernel probe caches, pass target = NULL */
static int probe_cache__open(struct probe_cache *pcache, const char *target)
{
char cpath[PATH_MAX];
char sbuildid[SBUILD_ID_SIZE];
char *dir_name;
bool is_kallsyms = !target;
int ret, fd;
if (target)
ret = filename__sprintf_build_id(target, sbuildid);
else {
target = DSO__NAME_KALLSYMS;
ret = sysfs__sprintf_build_id("/", sbuildid);
}
if (ret < 0) {
pr_debug("Failed to get build-id from %s.\n", target);
return ret;
}
/* If we have no buildid cache, make it */
if (!build_id_cache__cached(sbuildid)) {
ret = build_id_cache__add_s(sbuildid, target,
is_kallsyms, NULL);
if (ret < 0) {
pr_debug("Failed to add build-id cache: %s\n", target);
return ret;
}
}
dir_name = build_id_cache__cachedir(sbuildid, target, is_kallsyms,
false);
if (!dir_name)
return -ENOMEM;
snprintf(cpath, PATH_MAX, "%s/probes", dir_name);
fd = open(cpath, O_CREAT | O_RDWR, 0644);
if (fd < 0)
pr_debug("Failed to open cache(%d): %s\n", fd, cpath);
free(dir_name);
pcache->fd = fd;
return fd;
}
static int probe_cache__load(struct probe_cache *pcache)
{
struct probe_cache_entry *entry = NULL;
char buf[MAX_CMDLEN], *p;
int ret = 0;
FILE *fp;
fp = fdopen(dup(pcache->fd), "r");
if (!fp)
return -EINVAL;
while (!feof(fp)) {
if (!fgets(buf, MAX_CMDLEN, fp))
break;
p = strchr(buf, '\n');
if (p)
*p = '\0';
if (buf[0] == '#') { /* #perf_probe_event */
entry = probe_cache_entry__new(NULL);
if (!entry) {
ret = -ENOMEM;
goto out;
}
entry->spev = strdup(buf + 1);
if (entry->spev)
ret = parse_perf_probe_command(buf + 1,
&entry->pev);
else
ret = -ENOMEM;
if (ret < 0) {
probe_cache_entry__delete(entry);
goto out;
}
list_add_tail(&entry->node, &pcache->entries);
} else { /* trace_probe_event */
if (!entry) {
ret = -EINVAL;
goto out;
}
strlist__add(entry->tevlist, buf);
}
}
out:
fclose(fp);
return ret;
}
static struct probe_cache *probe_cache__alloc(void)
{
struct probe_cache *pcache = zalloc(sizeof(*pcache));
if (pcache) {
INIT_LIST_HEAD(&pcache->entries);
pcache->fd = -EINVAL;
}
return pcache;
}
void probe_cache__purge(struct probe_cache *pcache)
{
struct probe_cache_entry *entry, *n;
list_for_each_entry_safe(entry, n, &pcache->entries, node) {
list_del_init(&entry->node);
probe_cache_entry__delete(entry);
}
}
void probe_cache__delete(struct probe_cache *pcache)
{
if (!pcache)
return;
probe_cache__purge(pcache);
if (pcache->fd > 0)
close(pcache->fd);
free(pcache);
}
struct probe_cache *probe_cache__new(const char *target)
{
struct probe_cache *pcache = probe_cache__alloc();
int ret;
if (!pcache)
return NULL;
ret = probe_cache__open(pcache, target);
if (ret < 0) {
pr_debug("Cache open error: %d\n", ret);
goto out_err;
}
ret = probe_cache__load(pcache);
if (ret < 0) {
pr_debug("Cache read error: %d\n", ret);
goto out_err;
}
return pcache;
out_err:
probe_cache__delete(pcache);
return NULL;
}
static bool streql(const char *a, const char *b)
{
if (a == b)
return true;
if (!a || !b)
return false;
return !strcmp(a, b);
}
static struct probe_cache_entry *
probe_cache__find(struct probe_cache *pcache, struct perf_probe_event *pev)
{
struct probe_cache_entry *entry = NULL;
char *cmd = synthesize_perf_probe_command(pev);
if (!cmd)
return NULL;
list_for_each_entry(entry, &pcache->entries, node) {
/* Hit if same event name or same command-string */
if ((pev->event &&
(streql(entry->pev.group, pev->group) &&
streql(entry->pev.event, pev->event))) ||
(!strcmp(entry->spev, cmd)))
goto found;
}
entry = NULL;
found:
free(cmd);
return entry;
}
int probe_cache__add_entry(struct probe_cache *pcache,
struct perf_probe_event *pev,
struct probe_trace_event *tevs, int ntevs)
{
struct probe_cache_entry *entry = NULL;
char *command;
int i, ret = 0;
if (!pcache || !pev || !tevs || ntevs <= 0) {
ret = -EINVAL;
goto out_err;
}
/* Remove old cache entry */
entry = probe_cache__find(pcache, pev);
if (entry) {
list_del_init(&entry->node);
probe_cache_entry__delete(entry);
}
ret = -ENOMEM;
entry = probe_cache_entry__new(pev);
if (!entry)
goto out_err;
for (i = 0; i < ntevs; i++) {
if (!tevs[i].point.symbol)
continue;
command = synthesize_probe_trace_command(&tevs[i]);
if (!command)
goto out_err;
strlist__add(entry->tevlist, command);
free(command);
}
list_add_tail(&entry->node, &pcache->entries);
pr_debug("Added probe cache: %d\n", ntevs);
return 0;
out_err:
pr_debug("Failed to add probe caches\n");
probe_cache_entry__delete(entry);
return ret;
}
static int probe_cache_entry__write(struct probe_cache_entry *entry, int fd)
{
struct str_node *snode;
struct stat st;
struct iovec iov[3];
int ret;
/* Save stat for rollback */
ret = fstat(fd, &st);
if (ret < 0)
return ret;
pr_debug("Writing cache: #%s\n", entry->spev);
iov[0].iov_base = (void *)"#"; iov[0].iov_len = 1;
iov[1].iov_base = entry->spev; iov[1].iov_len = strlen(entry->spev);
iov[2].iov_base = (void *)"\n"; iov[2].iov_len = 1;
ret = writev(fd, iov, 3);
if (ret < (int)iov[1].iov_len + 2)
goto rollback;
strlist__for_each(snode, entry->tevlist) {
iov[0].iov_base = (void *)snode->s;
iov[0].iov_len = strlen(snode->s);
iov[1].iov_base = (void *)"\n"; iov[1].iov_len = 1;
ret = writev(fd, iov, 2);
if (ret < (int)iov[0].iov_len + 1)
goto rollback;
}
return 0;
rollback:
/* Rollback to avoid cache file corruption */
if (ret > 0)
ret = -1;
if (ftruncate(fd, st.st_size) < 0)
ret = -2;
return ret;
}
int probe_cache__commit(struct probe_cache *pcache)
{
struct probe_cache_entry *entry;
int ret = 0;
/* TBD: if we do not update existing entries, skip it */
ret = lseek(pcache->fd, 0, SEEK_SET);
if (ret < 0)
goto out;
ret = ftruncate(pcache->fd, 0);
if (ret < 0)
goto out;
list_for_each_entry(entry, &pcache->entries, node) {
ret = probe_cache_entry__write(entry, pcache->fd);
pr_debug("Cache committed: %d\n", ret);
if (ret < 0)
break;
}
out:
return ret;
}

20
tools/perf/util/probe-file.h
View File

@ -5,6 +5,19 @@
#include "strfilter.h"
#include "probe-event.h"
/* Cache of probe definitions */
struct probe_cache_entry {
struct list_head node;
struct perf_probe_event pev;
char *spev;
struct strlist *tevlist;
};
struct probe_cache {
int fd;
struct list_head entries;
};
#define PF_FL_UPROBE 1
#define PF_FL_RW 2
@ -18,5 +31,12 @@ int probe_file__get_events(int fd, struct strfilter *filter,
struct strlist *plist);
int probe_file__del_strlist(int fd, struct strlist *namelist);
struct probe_cache *probe_cache__new(const char *target);
int probe_cache__add_entry(struct probe_cache *pcache,
struct perf_probe_event *pev,
struct probe_trace_event *tevs, int ntevs);
int probe_cache__commit(struct probe_cache *pcache);
void probe_cache__purge(struct probe_cache *pcache);
void probe_cache__delete(struct probe_cache *pcache);
#endif

14
tools/perf/util/sort.c
View File

@ -1218,7 +1218,7 @@ struct sort_entry sort_mem_daddr_dso = {
.se_header = "Data Object",
.se_cmp = sort__dso_daddr_cmp,
.se_snprintf = hist_entry__dso_daddr_snprintf,
.se_width_idx = HISTC_MEM_DADDR_SYMBOL,
.se_width_idx = HISTC_MEM_DADDR_DSO,
};
struct sort_entry sort_mem_locked = {
@ -1488,7 +1488,7 @@ void perf_hpp__reset_sort_width(struct perf_hpp_fmt *fmt, struct hists *hists)
}
static int __sort__hpp_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel)
struct hists *hists)
{
struct hpp_sort_entry *hse;
size_t len = fmt->user_len;
@ -1496,14 +1496,14 @@ static int __sort__hpp_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
hse = container_of(fmt, struct hpp_sort_entry, hpp);
if (!len)
len = hists__col_len(evsel__hists(evsel), hse->se->se_width_idx);
len = hists__col_len(hists, hse->se->se_width_idx);
return scnprintf(hpp->buf, hpp->size, "%-*.*s", len, len, fmt->name);
}
static int __sort__hpp_width(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp __maybe_unused,
struct perf_evsel *evsel)
struct hists *hists)
{
struct hpp_sort_entry *hse;
size_t len = fmt->user_len;
@ -1511,7 +1511,7 @@ static int __sort__hpp_width(struct perf_hpp_fmt *fmt,
hse = container_of(fmt, struct hpp_sort_entry, hpp);
if (!len)
len = hists__col_len(evsel__hists(evsel), hse->se->se_width_idx);
len = hists__col_len(hists, hse->se->se_width_idx);
return len;
}
@ -1793,7 +1793,7 @@ static void update_dynamic_len(struct hpp_dynamic_entry *hde,
}
static int __sort__hde_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel __maybe_unused)
struct hists *hists __maybe_unused)
{
struct hpp_dynamic_entry *hde;
size_t len = fmt->user_len;
@ -1808,7 +1808,7 @@ static int __sort__hde_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
static int __sort__hde_width(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp __maybe_unused,
struct perf_evsel *evsel __maybe_unused)
struct hists *hists __maybe_unused)
{
struct hpp_dynamic_entry *hde;
size_t len = fmt->user_len;

13
tools/perf/util/util.c
View File

@ -97,20 +97,17 @@ int rm_rf(char *path)
scnprintf(namebuf, sizeof(namebuf), "%s/%s",
path, d->d_name);
ret = stat(namebuf, &statbuf);
/* We have to check symbolic link itself */
ret = lstat(namebuf, &statbuf);
if (ret < 0) {
pr_debug("stat failed: %s\n", namebuf);
break;
}
if (S_ISREG(statbuf.st_mode))
ret = unlink(namebuf);
else if (S_ISDIR(statbuf.st_mode))
if (S_ISDIR(statbuf.st_mode))
ret = rm_rf(namebuf);
else {
pr_debug("unknown file: %s\n", namebuf);
ret = -1;
}
else
ret = unlink(namebuf);
}
closedir(dir);