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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

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

User visible changes:

- Mark events as (x86 only) in help output for 'perf kvm stat live" (Alexander Yarygin)

- Provide a better explanation when mmap fails in 'trace' (Arnaldo Carvalho de Melo)

- Add --buildid-dir option to set cache directory, i.e. use:

      $ perf --buildid-dir /path/to/dir tool --tool-options

  (Jiri Olsa)

- Fix memcpy/memset 'perf bench' output (Rabin Vicent)

- Fix 'perf test' attr tests size values to cope with machine state on
  interrupt ABI changes (Jiri Olsa)

- Fixup callchain type parameter handling error message (Kan Liang)

Infrastructure changes and cleanups:

- calloc/xcalloc: Fix argument order (Arjun Sreedharan)

- Move filename__read_int from tools/perf/ to tools/lib, add sysctl__read_int
  there and use it in place of ad-hoc copies (Arnaldo Carvalho de Melo)

- Use single strcmp call instead of two (Jiri Olsa)

- Remove extra debugdir variables in 'perf buildid-cache' (Jiri Olsa)

- Fix -a segfault related to kcore handling in 'perf buildid-cache' (Jiri Olsa)

- Move cpumode resolve code to add_callchain_ip (Kan Liang)

- Merge memset into memcpy 'perf bench' (Rabin Vincent)

- Change print format from %lu to %PRIu64 in the hists browser (Tom Huynh)

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
2014-12-12 09:09:52 +01:00
parent 3459f0d78f e09b18d490
commit 41e950c033
25 changed files with 417 additions and 568 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/util/build-id.c
+3 -6
View File
@@ -410,21 +410,18 @@ int perf_session__cache_build_ids(struct perf_session *session)
{
struct rb_node *nd;
int ret;
char debugdir[PATH_MAX];
if (no_buildid_cache)
return 0;
snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST)
return -1;
ret = machine__cache_build_ids(&session->machines.host, debugdir);
ret = machine__cache_build_ids(&session->machines.host, buildid_dir);
for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
ret |= machine__cache_build_ids(pos, debugdir);
ret |= machine__cache_build_ids(pos, buildid_dir);
}
return ret ? -1 : 0;
}
tools/perf/util/callchain.c
+1 -1
View File
@@ -77,7 +77,7 @@ int parse_callchain_record_opt(const char *arg)
ret = 0;
} else
pr_err("callchain: No more arguments "
"needed for -g fp\n");
"needed for --call-graph fp\n");
break;
#ifdef HAVE_DWARF_UNWIND_SUPPORT
tools/perf/util/config.c
+6 -4
View File
@@ -522,7 +522,7 @@ static int buildid_dir_command_config(const char *var, const char *value,
const char *v;
/* same dir for all commands */
if (!prefixcmp(var, "buildid.") && !strcmp(var + 8, "dir")) {
if (!strcmp(var, "buildid.dir")) {
v = perf_config_dirname(var, value);
if (!v)
return -1;
@@ -539,12 +539,14 @@ static void check_buildid_dir_config(void)
perf_config(buildid_dir_command_config, &c);
}
void set_buildid_dir(void)
void set_buildid_dir(const char *dir)
{
buildid_dir[0] = '\0';
if (dir)
scnprintf(buildid_dir, MAXPATHLEN-1, "%s", dir);
/* try config file */
check_buildid_dir_config();
if (buildid_dir[0] == '\0')
check_buildid_dir_config();
/* default to $HOME/.debug */
if (buildid_dir[0] == '\0') {
tools/perf/util/evlist.c
+23
View File
@@ -8,6 +8,7 @@
*/
#include "util.h"
#include <api/fs/debugfs.h>
#include <api/fs/fs.h>
#include <poll.h>
#include "cpumap.h"
#include "thread_map.h"
@@ -1483,6 +1484,28 @@ int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused,
return 0;
}
int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size)
{
char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf));
int value;
switch (err) {
case EPERM:
sysctl__read_int("kernel/perf_event_mlock_kb", &value);
scnprintf(buf, size, "Error:\t%s.\n"
"Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n"
"Hint:\tTried using %zd kB.\n"
"Hint:\tTry using a bigger -m/--mmap-pages value.",
emsg, value, evlist->mmap_len / 1024);
break;
default:
scnprintf(buf, size, "%s", emsg);
break;
}
return 0;
}
void perf_evlist__to_front(struct perf_evlist *evlist,
struct perf_evsel *move_evsel)
{
tools/perf/util/evlist.h
+1
View File
@@ -185,6 +185,7 @@ size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
int perf_evlist__strerror_tp(struct perf_evlist *evlist, int err, char *buf, size_t size);
int perf_evlist__strerror_open(struct perf_evlist *evlist, int err, char *buf, size_t size);
int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size);
static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
{
tools/perf/util/machine.c
+35 -37
View File
@@ -1385,19 +1385,46 @@ struct mem_info *sample__resolve_mem(struct perf_sample *sample,
static int add_callchain_ip(struct thread *thread,
struct symbol **parent,
struct addr_location *root_al,
int cpumode,
bool branch_history,
u64 ip)
{
struct addr_location al;
al.filtered = 0;
al.sym = NULL;
if (cpumode == -1)
if (branch_history)
thread__find_cpumode_addr_location(thread, MAP__FUNCTION,
ip, &al);
else
else {
u8 cpumode = PERF_RECORD_MISC_USER;
if (ip >= PERF_CONTEXT_MAX) {
switch (ip) {
case PERF_CONTEXT_HV:
cpumode = PERF_RECORD_MISC_HYPERVISOR;
break;
case PERF_CONTEXT_KERNEL:
cpumode = PERF_RECORD_MISC_KERNEL;
break;
case PERF_CONTEXT_USER:
cpumode = PERF_RECORD_MISC_USER;
break;
default:
pr_debug("invalid callchain context: "
"%"PRId64"\n", (s64) ip);
/*
* It seems the callchain is corrupted.
* Discard all.
*/
callchain_cursor_reset(&callchain_cursor);
return 1;
}
return 0;
}
thread__find_addr_location(thread, cpumode, MAP__FUNCTION,
ip, &al);
}
if (al.sym != NULL) {
if (sort__has_parent && !*parent &&
symbol__match_regex(al.sym, &parent_regex))
@@ -1480,11 +1507,8 @@ static int thread__resolve_callchain_sample(struct thread *thread,
struct addr_location *root_al,
int max_stack)
{
u8 cpumode = PERF_RECORD_MISC_USER;
int chain_nr = min(max_stack, (int)chain->nr);
int i;
int j;
int err;
int i, j, err;
int skip_idx = -1;
int first_call = 0;
@@ -1542,10 +1566,10 @@ static int thread__resolve_callchain_sample(struct thread *thread,
for (i = 0; i < nr; i++) {
err = add_callchain_ip(thread, parent, root_al,
-1, be[i].to);
true, be[i].to);
if (!err)
err = add_callchain_ip(thread, parent, root_al,
-1, be[i].from);
true, be[i].from);
if (err == -EINVAL)
break;
if (err)
@@ -1574,36 +1598,10 @@ check_calls:
#endif
ip = chain->ips[j];
if (ip >= PERF_CONTEXT_MAX) {
switch (ip) {
case PERF_CONTEXT_HV:
cpumode = PERF_RECORD_MISC_HYPERVISOR;
break;
case PERF_CONTEXT_KERNEL:
cpumode = PERF_RECORD_MISC_KERNEL;
break;
case PERF_CONTEXT_USER:
cpumode = PERF_RECORD_MISC_USER;
break;
default:
pr_debug("invalid callchain context: "
"%"PRId64"\n", (s64) ip);
/*
* It seems the callchain is corrupted.
* Discard all.
*/
callchain_cursor_reset(&callchain_cursor);
return 0;
}
continue;
}
err = add_callchain_ip(thread, parent, root_al, false, ip);
err = add_callchain_ip(thread, parent, root_al,
cpumode, ip);
if (err == -EINVAL)
break;
if (err)
return err;
return (err < 0) ? err : 0;
}
return 0;
tools/perf/util/record.c
+1 -10
View File
@@ -137,16 +137,7 @@ void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts)
static int get_max_rate(unsigned int *rate)
{
char path[PATH_MAX];
const char *procfs = procfs__mountpoint();
if (!procfs)
return -1;
snprintf(path, PATH_MAX,
"%s/sys/kernel/perf_event_max_sample_rate", procfs);
return filename__read_int(path, (int *) rate);
return sysctl__read_int("kernel/perf_event_max_sample_rate", (int *)rate);
}
static int record_opts__config_freq(struct record_opts *opts)
tools/perf/util/util.c
+1 -25
View File
@@ -442,23 +442,6 @@ unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
return (unsigned long) -1;
}
int filename__read_int(const char *filename, int *value)
{
char line[64];
int fd = open(filename, O_RDONLY), err = -1;
if (fd < 0)
return -1;
if (read(fd, line, sizeof(line)) > 0) {
*value = atoi(line);
err = 0;
}
close(fd);
return err;
}
int filename__read_str(const char *filename, char **buf, size_t *sizep)
{
size_t size = 0, alloc_size = 0;
@@ -523,16 +506,9 @@ const char *get_filename_for_perf_kvm(void)
int perf_event_paranoid(void)
{
char path[PATH_MAX];
const char *procfs = procfs__mountpoint();
int value;
if (!procfs)
return INT_MAX;
scnprintf(path, PATH_MAX, "%s/sys/kernel/perf_event_paranoid", procfs);
if (filename__read_int(path, &value))
if (sysctl__read_int("kernel/perf_event_paranoid", &value))
return INT_MAX;
return value;
tools/perf/util/util.h
+1 -2
View File
@@ -153,7 +153,7 @@ extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)))
extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
extern int prefixcmp(const char *str, const char *prefix);
extern void set_buildid_dir(void);
extern void set_buildid_dir(const char *dir);
static inline const char *skip_prefix(const char *str, const char *prefix)
{
@@ -343,7 +343,6 @@ char *get_srcline(struct dso *dso, unsigned long addr, struct symbol *sym,
bool show_sym);
void free_srcline(char *srcline);
int filename__read_int(const char *filename, int *value);
int filename__read_str(const char *filename, char **buf, size_t *sizep);
int perf_event_paranoid(void);