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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

Browse Source 
Includes smaller fixes and improvements plus the exclude_{host,guest} feature
test and fallback to handle older kernels.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ingo Molnar
2012-02-17 09:02:28 +01:00
parent f8d98f1095 808e122630
commit d1e169da9e
33 changed files with 615 additions and 415 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/Documentation/perf-record.txt
+2 -2
View File
@@ -52,11 +52,11 @@ OPTIONS
-p::
--pid=::
Record events on existing process ID.
Record events on existing process ID (comma separated list).
-t::
--tid=::
Record events on existing thread ID.
Record events on existing thread ID (comma separated list).
-u::
--uid=::
tools/perf/Documentation/perf-stat.txt
+2 -2
View File
@@ -35,11 +35,11 @@ OPTIONS
child tasks do not inherit counters
-p::
--pid=<pid>::
stat events on existing process id
stat events on existing process id (comma separated list)
-t::
--tid=<tid>::
stat events on existing thread id
stat events on existing thread id (comma separated list)
-a::
tools/perf/Documentation/perf-top.txt
+2 -2
View File
@@ -72,11 +72,11 @@ Default is to monitor all CPUS.
-p <pid>::
--pid=<pid>::
Profile events on existing Process ID.
Profile events on existing Process ID (comma separated list).
-t <tid>::
--tid=<tid>::
Profile events on existing thread ID.
Profile events on existing thread ID (comma separated list).
-u::
--uid=::
tools/perf/MANIFEST
+1
View File
@@ -9,6 +9,7 @@ lib/rbtree.c
include/linux/swab.h
arch/*/include/asm/unistd*.h
arch/*/lib/memcpy*.S
arch/*/lib/memset*.S
include/linux/poison.h
include/linux/magic.h
include/linux/hw_breakpoint.h
tools/perf/Makefile
+6 -1
View File
@@ -183,7 +183,10 @@ SCRIPT_SH += perf-archive.sh
grep-libs = $(filter -l%,$(1))
strip-libs = $(filter-out -l%,$(1))
$(OUTPUT)python/perf.so: $(PYRF_OBJS)
PYTHON_EXT_SRCS := $(shell grep -v ^\# util/python-ext-sources)
PYTHON_EXT_DEPS := util/python-ext-sources util/setup.py
$(OUTPUT)python/perf.so: $(PYRF_OBJS) $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS)
$(QUIET_GEN)CFLAGS='$(BASIC_CFLAGS)' $(PYTHON_WORD) util/setup.py \
--quiet build_ext; \
mkdir -p $(OUTPUT)python && \
@@ -256,6 +259,7 @@ LIB_H += util/callchain.h
LIB_H += util/build-id.h
LIB_H += util/debug.h
LIB_H += util/debugfs.h
LIB_H += util/sysfs.h
LIB_H += util/event.h
LIB_H += util/evsel.h
LIB_H += util/evlist.h
@@ -302,6 +306,7 @@ LIB_OBJS += $(OUTPUT)util/build-id.o
LIB_OBJS += $(OUTPUT)util/config.o
LIB_OBJS += $(OUTPUT)util/ctype.o
LIB_OBJS += $(OUTPUT)util/debugfs.o
LIB_OBJS += $(OUTPUT)util/sysfs.o
LIB_OBJS += $(OUTPUT)util/environment.o
LIB_OBJS += $(OUTPUT)util/event.o
LIB_OBJS += $(OUTPUT)util/evlist.o
tools/perf/builtin-record.c
+26 -18
View File
@@ -205,8 +205,11 @@ static void perf_record__open(struct perf_record *rec)
if (opts->group && pos != first)
group_fd = first->fd;
fallback_missing_features:
if (opts->exclude_guest_missing)
attr->exclude_guest = attr->exclude_host = 0;
retry_sample_id:
attr->sample_id_all = opts->sample_id_all_avail ? 1 : 0;
attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
try_again:
if (perf_evsel__open(pos, evlist->cpus, evlist->threads,
opts->group, group_fd) < 0) {
@@ -218,15 +221,23 @@ try_again:
} else if (err == ENODEV && opts->cpu_list) {
die("No such device - did you specify"
" an out-of-range profile CPU?\n");
} else if (err == EINVAL && opts->sample_id_all_avail) {
/*
* Old kernel, no attr->sample_id_type_all field
*/
opts->sample_id_all_avail = false;
if (!opts->sample_time && !opts->raw_samples && !time_needed)
attr->sample_type &= ~PERF_SAMPLE_TIME;
} else if (err == EINVAL) {
if (!opts->exclude_guest_missing &&
(attr->exclude_guest || attr->exclude_host)) {
pr_debug("Old kernel, cannot exclude "
"guest or host samples.\n");
opts->exclude_guest_missing = true;
goto fallback_missing_features;
} else if (!opts->sample_id_all_missing) {
/*
* Old kernel, no attr->sample_id_type_all field
*/
opts->sample_id_all_missing = true;
if (!opts->sample_time && !opts->raw_samples && !time_needed)
attr->sample_type &= ~PERF_SAMPLE_TIME;
goto retry_sample_id;
goto retry_sample_id;
}
}
/*
@@ -494,9 +505,9 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
return err;
}
if (!!rec->no_buildid
if (!rec->no_buildid
&& !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
pr_err("Couldn't generating buildids. "
pr_err("Couldn't generate buildids. "
"Use --no-buildid to profile anyway.\n");
return -1;
}
@@ -645,13 +656,10 @@ static const char * const record_usage[] = {
*/
static struct perf_record record = {
.opts = {
.target_pid = -1,
.target_tid = -1,
.mmap_pages = UINT_MAX,
.user_freq = UINT_MAX,
.user_interval = ULLONG_MAX,
.freq = 1000,
.sample_id_all_avail = true,
},
.write_mode = WRITE_FORCE,
.file_new = true,
@@ -670,9 +678,9 @@ const struct option record_options[] = {
parse_events_option),
OPT_CALLBACK(0, "filter", &record.evlist, "filter",
"event filter", parse_filter),
OPT_INTEGER('p', "pid", &record.opts.target_pid,
OPT_STRING('p', "pid", &record.opts.target_pid, "pid",
"record events on existing process id"),
OPT_INTEGER('t', "tid", &record.opts.target_tid,
OPT_STRING('t', "tid", &record.opts.target_tid, "tid",
"record events on existing thread id"),
OPT_INTEGER('r', "realtime", &record.realtime_prio,
"collect data with this RT SCHED_FIFO priority"),
@@ -739,7 +747,7 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && rec->opts.target_pid == -1 && rec->opts.target_tid == -1 &&
if (!argc && !rec->opts.target_pid && !rec->opts.target_tid &&
!rec->opts.system_wide && !rec->opts.cpu_list && !rec->uid_str)
usage_with_options(record_usage, record_options);
@@ -785,7 +793,7 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
if (rec->uid_str != NULL && rec->opts.uid == UINT_MAX - 1)
goto out_free_fd;
if (rec->opts.target_pid != -1)
if (rec->opts.target_pid)
rec->opts.target_tid = rec->opts.target_pid;
if (perf_evlist__create_maps(evsel_list, rec->opts.target_pid,
tools/perf/builtin-stat.c
+16 -15
View File
@@ -182,8 +182,8 @@ static int run_count = 1;
static bool no_inherit = false;
static bool scale = true;
static bool no_aggr = false;
static pid_t target_pid = -1;
static pid_t target_tid = -1;
static const char *target_pid;
static const char *target_tid;
static pid_t child_pid = -1;
static bool null_run = false;
static int detailed_run = 0;
@@ -296,7 +296,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel,
if (system_wide)
return perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
group, group_fd);
if (target_pid == -1 && target_tid == -1) {
if (!target_pid && !target_tid) {
attr->disabled = 1;
attr->enable_on_exec = 1;
}
@@ -446,7 +446,7 @@ static int run_perf_stat(int argc __used, const char **argv)
exit(-1);
}
if (target_tid == -1 && target_pid == -1 && !system_wide)
if (!target_tid && !target_pid && !system_wide)
evsel_list->threads->map[0] = child_pid;
/*
@@ -968,14 +968,14 @@ static void print_stat(int argc, const char **argv)
if (!csv_output) {
fprintf(output, "\n");
fprintf(output, " Performance counter stats for ");
if(target_pid == -1 && target_tid == -1) {
if (!target_pid && !target_tid) {
fprintf(output, "\'%s", argv[0]);
for (i = 1; i < argc; i++)
fprintf(output, " %s", argv[i]);
} else if (target_pid != -1)
fprintf(output, "process id \'%d", target_pid);
} else if (target_pid)
fprintf(output, "process id \'%s", target_pid);
else
fprintf(output, "thread id \'%d", target_tid);
fprintf(output, "thread id \'%s", target_tid);
fprintf(output, "\'");
if (run_count > 1)
@@ -1049,10 +1049,10 @@ static const struct option options[] = {
"event filter", parse_filter),
OPT_BOOLEAN('i', "no-inherit", &no_inherit,
"child tasks do not inherit counters"),
OPT_INTEGER('p', "pid", &target_pid,
"stat events on existing process id"),
OPT_INTEGER('t', "tid", &target_tid,
"stat events on existing thread id"),
OPT_STRING('p', "pid", &target_pid, "pid",
"stat events on existing process id"),
OPT_STRING('t', "tid", &target_tid, "tid",
"stat events on existing thread id"),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
OPT_BOOLEAN('g', "group", &group,
@@ -1190,7 +1190,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
} else if (big_num_opt == 0) /* User passed --no-big-num */
big_num = false;
if (!argc && target_pid == -1 && target_tid == -1)
if (!argc && !target_pid && !target_tid)
usage_with_options(stat_usage, options);
if (run_count <= 0)
usage_with_options(stat_usage, options);
@@ -1206,10 +1206,11 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
if (add_default_attributes())
goto out;
if (target_pid != -1)
if (target_pid)
target_tid = target_pid;
evsel_list->threads = thread_map__new(target_pid, target_tid, UINT_MAX);
evsel_list->threads = thread_map__new_str(target_pid,
target_tid, UINT_MAX);
if (evsel_list->threads == NULL) {
pr_err("Problems finding threads of monitor\n");
usage_with_options(stat_usage, options);
tools/perf/builtin-test.c
-3
View File
@@ -1010,12 +1010,9 @@ realloc:
static int test__PERF_RECORD(void)
{
struct perf_record_opts opts = {
.target_pid = -1,
.target_tid = -1,
.no_delay = true,
.freq = 10,
.mmap_pages = 256,
.sample_id_all_avail = true,
};
cpu_set_t *cpu_mask = NULL;
size_t cpu_mask_size = 0;
tools/perf/builtin-top.c
+29 -15
View File
@@ -677,6 +677,12 @@ static void perf_event__process_sample(struct perf_tool *tool,
return;
}
if (!machine) {
pr_err("%u unprocessable samples recorded.",
top->session->hists.stats.nr_unprocessable_samples++);
return;
}
if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
top->exact_samples++;
@@ -866,8 +872,11 @@ static void perf_top__start_counters(struct perf_top *top)
attr->mmap = 1;
attr->comm = 1;
attr->inherit = top->inherit;
fallback_missing_features:
if (top->exclude_guest_missing)
attr->exclude_guest = attr->exclude_host = 0;
retry_sample_id:
attr->sample_id_all = top->sample_id_all_avail ? 1 : 0;
attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
try_again:
if (perf_evsel__open(counter, top->evlist->cpus,
top->evlist->threads, top->group,
@@ -877,12 +886,20 @@ try_again:
if (err == EPERM || err == EACCES) {
ui__error_paranoid();
goto out_err;
} else if (err == EINVAL && top->sample_id_all_avail) {
/*
* Old kernel, no attr->sample_id_type_all field
*/
top->sample_id_all_avail = false;
goto retry_sample_id;
} else if (err == EINVAL) {
if (!top->exclude_guest_missing &&
(attr->exclude_guest || attr->exclude_host)) {
pr_debug("Old kernel, cannot exclude "
"guest or host samples.\n");
top->exclude_guest_missing = true;
goto fallback_missing_features;
} else if (!top->sample_id_all_missing) {
/*
* Old kernel, no attr->sample_id_type_all field
*/
top->sample_id_all_missing = true;
goto retry_sample_id;
}
}
/*
* If it's cycles then fall back to hrtimer
@@ -965,7 +982,7 @@ static int __cmd_top(struct perf_top *top)
if (ret)
goto out_delete;
if (top->target_tid != -1 || top->uid != UINT_MAX)
if (top->target_tid || top->uid != UINT_MAX)
perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
perf_event__process,
&top->session->host_machine);
@@ -1103,11 +1120,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
struct perf_top top = {
.count_filter = 5,
.delay_secs = 2,
.target_pid = -1,
.target_tid = -1,
.uid = UINT_MAX,
.freq = 1000, /* 1 KHz */
.sample_id_all_avail = true,
.mmap_pages = 128,
.sym_pcnt_filter = 5,
};
@@ -1118,9 +1132,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
parse_events_option),
OPT_INTEGER('c', "count", &top.default_interval,
"event period to sample"),
OPT_INTEGER('p', "pid", &top.target_pid,
OPT_STRING('p', "pid", &top.target_pid, "pid",
"profile events on existing process id"),
OPT_INTEGER('t', "tid", &top.target_tid,
OPT_STRING('t', "tid", &top.target_tid, "tid",
"profile events on existing thread id"),
OPT_BOOLEAN('a', "all-cpus", &top.system_wide,
"system-wide collection from all CPUs"),
@@ -1210,13 +1224,13 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
goto out_delete_evlist;
/* CPU and PID are mutually exclusive */
if (top.target_tid > 0 && top.cpu_list) {
if (top.target_tid && top.cpu_list) {
printf("WARNING: PID switch overriding CPU\n");
sleep(1);
top.cpu_list = NULL;
}
if (top.target_pid != -1)
if (top.target_pid)
top.target_tid = top.target_pid;
if (perf_evlist__create_maps(top.evlist, top.target_pid,
tools/perf/perf.h
+4 -4
View File
@@ -167,7 +167,6 @@ sys_perf_event_open(struct perf_event_attr *attr,
pid_t pid, int cpu, int group_fd,
unsigned long flags)
{
attr->size = sizeof(*attr);
return syscall(__NR_perf_event_open, attr, pid, cpu,
group_fd, flags);
}
@@ -186,8 +185,8 @@ extern const char perf_version_string[];
void pthread__unblock_sigwinch(void);
struct perf_record_opts {
pid_t target_pid;
pid_t target_tid;
const char *target_pid;
const char *target_tid;
uid_t uid;
bool call_graph;
bool group;
@@ -199,7 +198,8 @@ struct perf_record_opts {
bool raw_samples;
bool sample_address;
bool sample_time;
bool sample_id_all_avail;
bool sample_id_all_missing;
bool exclude_guest_missing;
bool system_wide;
bool period;
unsigned int freq;
tools/perf/util/bitmap.c
+10
View File
@@ -19,3 +19,13 @@ int __bitmap_weight(const unsigned long *bitmap, int bits)
return w;
}
void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
{
int k;
int nr = BITS_TO_LONGS(bits);
for (k = 0; k < nr; k++)
dst[k] = bitmap1[k] | bitmap2[k];
}
tools/perf/util/ctype.c
+1 -1
View File
@@ -3,7 +3,7 @@
*
* No surprises, and works with signed and unsigned chars.
*/
#include "cache.h"
#include "util.h"
enum {
S = GIT_SPACE,
tools/perf/util/debugfs.c
-141
View File
@@ -15,32 +15,6 @@ static const char *debugfs_known_mountpoints[] = {
0,
};
/* use this to force a umount */
void debugfs_force_cleanup(void)
{
debugfs_find_mountpoint();
debugfs_premounted = 0;
debugfs_umount();
}
/* construct a full path to a debugfs element */
int debugfs_make_path(const char *element, char *buffer, int size)
{
int len;
if (strlen(debugfs_mountpoint) == 0) {
buffer[0] = '\0';
return -1;
}
len = strlen(debugfs_mountpoint) + strlen(element) + 1;
if (len >= size)
return len+1;
snprintf(buffer, size-1, "%s/%s", debugfs_mountpoint, element);
return 0;
}
static int debugfs_found;
/* find the path to the mounted debugfs */
@@ -97,17 +71,6 @@ int debugfs_valid_mountpoint(const char *debugfs)
return 0;
}
int debugfs_valid_entry(const char *path)
{
struct stat st;
if (stat(path, &st))
return -errno;
return 0;
}
static void debugfs_set_tracing_events_path(const char *mountpoint)
{
snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
@@ -149,107 +112,3 @@ void debugfs_set_path(const char *mountpoint)
snprintf(debugfs_mountpoint, sizeof(debugfs_mountpoint), "%s", mountpoint);
debugfs_set_tracing_events_path(mountpoint);
}
/* umount the debugfs */
int debugfs_umount(void)
{
char umountcmd[128];
int ret;
/* if it was already mounted, leave it */
if (debugfs_premounted)
return 0;
/* make sure it's a valid mount point */
ret = debugfs_valid_mountpoint(debugfs_mountpoint);
if (ret)
return ret;
snprintf(umountcmd, sizeof(umountcmd),
"/bin/umount %s", debugfs_mountpoint);
return system(umountcmd);
}
int debugfs_write(const char *entry, const char *value)
{
char path[PATH_MAX + 1];
int ret, count;
int fd;
/* construct the path */
snprintf(path, sizeof(path), "%s/%s", debugfs_mountpoint, entry);
/* verify that it exists */
ret = debugfs_valid_entry(path);
if (ret)
return ret;
/* get how many chars we're going to write */
count = strlen(value);
/* open the debugfs entry */
fd = open(path, O_RDWR);
if (fd < 0)
return -errno;
while (count > 0) {
/* write it */
ret = write(fd, value, count);
if (ret <= 0) {
if (ret == EAGAIN)
continue;
close(fd);
return -errno;
}
count -= ret;
}
/* close it */
close(fd);
/* return success */
return 0;
}
/*
* read a debugfs entry
* returns the number of chars read or a negative errno
*/
int debugfs_read(const char *entry, char *buffer, size_t size)
{
char path[PATH_MAX + 1];
int ret;
int fd;
/* construct the path */
snprintf(path, sizeof(path), "%s/%s", debugfs_mountpoint, entry);
/* verify that it exists */
ret = debugfs_valid_entry(path);
if (ret)
return ret;
/* open the debugfs entry */
fd = open(path, O_RDONLY);
if (fd < 0)
return -errno;
do {
/* read it */
ret = read(fd, buffer, size);
if (ret == 0) {
close(fd);
return EOF;
}
} while (ret < 0 && errno == EAGAIN);
/* close it */
close(fd);
/* make *sure* there's a null character at the end */
buffer[ret] = '\0';
/* return the number of chars read */
return ret;
}
tools/perf/util/debugfs.h
-6
View File
@@ -3,14 +3,8 @@
const char *debugfs_find_mountpoint(void);
int debugfs_valid_mountpoint(const char *debugfs);
int debugfs_valid_entry(const char *path);
char *debugfs_mount(const char *mountpoint);
int debugfs_umount(void);
void debugfs_set_path(const char *mountpoint);
int debugfs_write(const char *entry, const char *value);
int debugfs_read(const char *entry, char *buffer, size_t size);
void debugfs_force_cleanup(void);
int debugfs_make_path(const char *element, char *buffer, int size);
extern char debugfs_mountpoint[];
extern char tracing_events_path[];
tools/perf/util/evlist.c
+5 -5
View File
@@ -593,15 +593,15 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
return perf_evlist__mmap_per_cpu(evlist, prot, mask);
}
int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid,
pid_t target_tid, uid_t uid, const char *cpu_list)
int perf_evlist__create_maps(struct perf_evlist *evlist, const char *target_pid,
const char *target_tid, uid_t uid, const char *cpu_list)
{
evlist->threads = thread_map__new(target_pid, target_tid, uid);
evlist->threads = thread_map__new_str(target_pid, target_tid, uid);
if (evlist->threads == NULL)
return -1;
if (uid != UINT_MAX || (cpu_list == NULL && target_tid != -1))
if (uid != UINT_MAX || (cpu_list == NULL && target_tid))
evlist->cpus = cpu_map__dummy_new();
else
evlist->cpus = cpu_map__new(cpu_list);
@@ -820,7 +820,7 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
exit(-1);
}
if (!opts->system_wide && opts->target_tid == -1 && opts->target_pid == -1)
if (!opts->system_wide && !opts->target_tid && !opts->target_pid)
evlist->threads->map[0] = evlist->workload.pid;
close(child_ready_pipe[1]);
tools/perf/util/evlist.h
+2 -2
View File
@@ -106,8 +106,8 @@ static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
evlist->threads = threads;
}
int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid,
pid_t tid, uid_t uid, const char *cpu_list);
int perf_evlist__create_maps(struct perf_evlist *evlist, const char *target_pid,
const char *tid, uid_t uid, const char *cpu_list);
void perf_evlist__delete_maps(struct perf_evlist *evlist);
int perf_evlist__set_filters(struct perf_evlist *evlist);
tools/perf/util/evsel.c
+3 -3
View File
@@ -68,7 +68,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts)
struct perf_event_attr *attr = &evsel->attr;
int track = !evsel->idx; /* only the first counter needs these */
attr->sample_id_all = opts->sample_id_all_avail ? 1 : 0;
attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
attr->inherit = !opts->no_inherit;
attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
PERF_FORMAT_TOTAL_TIME_RUNNING |
@@ -111,7 +111,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts)
if (opts->period)
attr->sample_type |= PERF_SAMPLE_PERIOD;
if (opts->sample_id_all_avail &&
if (!opts->sample_id_all_missing &&
(opts->sample_time || opts->system_wide ||
!opts->no_inherit || opts->cpu_list))
attr->sample_type |= PERF_SAMPLE_TIME;
@@ -130,7 +130,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts)
attr->mmap = track;
attr->comm = track;
if (opts->target_pid == -1 && opts->target_tid == -1 && !opts->system_wide) {
if (!opts->target_pid && !opts->target_tid && !opts->system_wide) {
attr->disabled = 1;
attr->enable_on_exec = 1;
}
tools/perf/util/header.c
+243 -178
View File
@@ -63,9 +63,20 @@ char *perf_header__find_event(u64 id)
return NULL;
}
static const char *__perf_magic = "PERFFILE";
/*
* magic2 = "PERFILE2"
* must be a numerical value to let the endianness
* determine the memory layout. That way we are able
* to detect endianness when reading the perf.data file
* back.
*
* we check for legacy (PERFFILE) format.
*/
static const char *__perf_magic1 = "PERFFILE";
static const u64 __perf_magic2 = 0x32454c4946524550ULL;
static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
#define PERF_MAGIC (*(u64 *)__perf_magic)
#define PERF_MAGIC __perf_magic2
struct perf_file_attr {
struct perf_event_attr attr;
@@ -1305,25 +1316,198 @@ static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
free(str);
}
static int __event_process_build_id(struct build_id_event *bev,
char *filename,
struct perf_session *session)
{
int err = -1;
struct list_head *head;
struct machine *machine;
u16 misc;
struct dso *dso;
enum dso_kernel_type dso_type;
machine = perf_session__findnew_machine(session, bev->pid);
if (!machine)
goto out;
misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
switch (misc) {
case PERF_RECORD_MISC_KERNEL:
dso_type = DSO_TYPE_KERNEL;
head = &machine->kernel_dsos;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
dso_type = DSO_TYPE_GUEST_KERNEL;
head = &machine->kernel_dsos;
break;
case PERF_RECORD_MISC_USER:
case PERF_RECORD_MISC_GUEST_USER:
dso_type = DSO_TYPE_USER;
head = &machine->user_dsos;
break;
default:
goto out;
}
dso = __dsos__findnew(head, filename);
if (dso != NULL) {
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
dso__set_build_id(dso, &bev->build_id);
if (filename[0] == '[')
dso->kernel = dso_type;
build_id__sprintf(dso->build_id, sizeof(dso->build_id),
sbuild_id);
pr_debug("build id event received for %s: %s\n",
dso->long_name, sbuild_id);
}
err = 0;
out:
return err;
}
static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
int input, u64 offset, u64 size)
{
struct perf_session *session = container_of(header, struct perf_session, header);
struct {
struct perf_event_header header;
u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
char filename[0];
} old_bev;
struct build_id_event bev;
char filename[PATH_MAX];
u64 limit = offset + size;
while (offset < limit) {
ssize_t len;
if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
return -1;
if (header->needs_swap)
perf_event_header__bswap(&old_bev.header);
len = old_bev.header.size - sizeof(old_bev);
if (read(input, filename, len) != len)
return -1;
bev.header = old_bev.header;
/*
* As the pid is the missing value, we need to fill
* it properly. The header.misc value give us nice hint.
*/
bev.pid = HOST_KERNEL_ID;
if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
bev.pid = DEFAULT_GUEST_KERNEL_ID;
memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
__event_process_build_id(&bev, filename, session);
offset += bev.header.size;
}
return 0;
}
static int perf_header__read_build_ids(struct perf_header *header,
int input, u64 offset, u64 size)
{
struct perf_session *session = container_of(header, struct perf_session, header);
struct build_id_event bev;
char filename[PATH_MAX];
u64 limit = offset + size, orig_offset = offset;
int err = -1;
while (offset < limit) {
ssize_t len;
if (read(input, &bev, sizeof(bev)) != sizeof(bev))
goto out;
if (header->needs_swap)
perf_event_header__bswap(&bev.header);
len = bev.header.size - sizeof(bev);
if (read(input, filename, len) != len)
goto out;
/*
* The a1645ce1 changeset:
*
* "perf: 'perf kvm' tool for monitoring guest performance from host"
*
* Added a field to struct build_id_event that broke the file
* format.
*
* Since the kernel build-id is the first entry, process the
* table using the old format if the well known
* '[kernel.kallsyms]' string for the kernel build-id has the
* first 4 characters chopped off (where the pid_t sits).
*/
if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
return -1;
return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
}
__event_process_build_id(&bev, filename, session);
offset += bev.header.size;
}
err = 0;
out:
return err;
}
static int process_trace_info(struct perf_file_section *section __unused,
struct perf_header *ph __unused,
int feat __unused, int fd)
{
trace_report(fd, false);
return 0;
}
static int process_build_id(struct perf_file_section *section,
struct perf_header *ph,
int feat __unused, int fd)
{
if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
pr_debug("Failed to read buildids, continuing...\n");
return 0;
}
struct feature_ops {
int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
void (*print)(struct perf_header *h, int fd, FILE *fp);
int (*process)(struct perf_file_section *section,
struct perf_header *h, int feat, int fd);
const char *name;
bool full_only;
};
#define FEAT_OPA(n, func) \
[n] = { .name = #n, .write = write_##func, .print = print_##func }
#define FEAT_OPP(n, func) \
[n] = { .name = #n, .write = write_##func, .print = print_##func, \
.process = process_##func }
#define FEAT_OPF(n, func) \
[n] = { .name = #n, .write = write_##func, .print = print_##func, .full_only = true }
[n] = { .name = #n, .write = write_##func, .print = print_##func, \
.full_only = true }
/* feature_ops not implemented: */
#define print_trace_info NULL
#define print_build_id NULL
static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
FEAT_OPA(HEADER_TRACE_INFO, trace_info),
FEAT_OPA(HEADER_BUILD_ID, build_id),
FEAT_OPP(HEADER_TRACE_INFO, trace_info),
FEAT_OPP(HEADER_BUILD_ID, build_id),
FEAT_OPA(HEADER_HOSTNAME, hostname),
FEAT_OPA(HEADER_OSRELEASE, osrelease),
FEAT_OPA(HEADER_VERSION, version),
@@ -1620,24 +1804,59 @@ out_free:
return err;
}
static int check_magic_endian(u64 *magic, struct perf_file_header *header,
struct perf_header *ph)
{
int ret;
/* check for legacy format */
ret = memcmp(magic, __perf_magic1, sizeof(*magic));
if (ret == 0) {
pr_debug("legacy perf.data format\n");
if (!header)
return -1;
if (header->attr_size != sizeof(struct perf_file_attr)) {
u64 attr_size = bswap_64(header->attr_size);
if (attr_size != sizeof(struct perf_file_attr))
return -1;
ph->needs_swap = true;
}
return 0;
}
/* check magic number with same endianness */
if (*magic == __perf_magic2)
return 0;
/* check magic number but opposite endianness */
if (*magic != __perf_magic2_sw)
return -1;
ph->needs_swap = true;
return 0;
}
int perf_file_header__read(struct perf_file_header *header,
struct perf_header *ph, int fd)
{
int ret;
lseek(fd, 0, SEEK_SET);
if (readn(fd, header, sizeof(*header)) <= 0 ||
memcmp(&header->magic, __perf_magic, sizeof(header->magic)))
ret = readn(fd, header, sizeof(*header));
if (ret <= 0)
return -1;
if (header->attr_size != sizeof(struct perf_file_attr)) {
u64 attr_size = bswap_64(header->attr_size);
if (attr_size != sizeof(struct perf_file_attr))
return -1;
if (check_magic_endian(&header->magic, header, ph) < 0)
return -1;
if (ph->needs_swap) {
mem_bswap_64(header, offsetof(struct perf_file_header,
adds_features));
ph->needs_swap = true;
adds_features));
}
if (header->size != sizeof(*header)) {
@@ -1689,156 +1908,6 @@ int perf_file_header__read(struct perf_file_header *header,
return 0;
}
static int __event_process_build_id(struct build_id_event *bev,
char *filename,
struct perf_session *session)
{
int err = -1;
struct list_head *head;
struct machine *machine;
u16 misc;
struct dso *dso;
enum dso_kernel_type dso_type;
machine = perf_session__findnew_machine(session, bev->pid);
if (!machine)
goto out;
misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
switch (misc) {
case PERF_RECORD_MISC_KERNEL:
dso_type = DSO_TYPE_KERNEL;
head = &machine->kernel_dsos;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
dso_type = DSO_TYPE_GUEST_KERNEL;
head = &machine->kernel_dsos;
break;
case PERF_RECORD_MISC_USER:
case PERF_RECORD_MISC_GUEST_USER:
dso_type = DSO_TYPE_USER;
head = &machine->user_dsos;
break;
default:
goto out;
}
dso = __dsos__findnew(head, filename);
if (dso != NULL) {
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
dso__set_build_id(dso, &bev->build_id);
if (filename[0] == '[')
dso->kernel = dso_type;
build_id__sprintf(dso->build_id, sizeof(dso->build_id),
sbuild_id);
pr_debug("build id event received for %s: %s\n",
dso->long_name, sbuild_id);
}
err = 0;
out:
return err;
}
static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
int input, u64 offset, u64 size)
{
struct perf_session *session = container_of(header, struct perf_session, header);
struct {
struct perf_event_header header;
u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
char filename[0];
} old_bev;
struct build_id_event bev;
char filename[PATH_MAX];
u64 limit = offset + size;
while (offset < limit) {
ssize_t len;
if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
return -1;
if (header->needs_swap)
perf_event_header__bswap(&old_bev.header);
len = old_bev.header.size - sizeof(old_bev);
if (read(input, filename, len) != len)
return -1;
bev.header = old_bev.header;
/*
* As the pid is the missing value, we need to fill
* it properly. The header.misc value give us nice hint.
*/
bev.pid = HOST_KERNEL_ID;
if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
bev.pid = DEFAULT_GUEST_KERNEL_ID;
memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
__event_process_build_id(&bev, filename, session);
offset += bev.header.size;
}
return 0;
}
static int perf_header__read_build_ids(struct perf_header *header,
int input, u64 offset, u64 size)
{
struct perf_session *session = container_of(header, struct perf_session, header);
struct build_id_event bev;
char filename[PATH_MAX];
u64 limit = offset + size, orig_offset = offset;
int err = -1;
while (offset < limit) {
ssize_t len;
if (read(input, &bev, sizeof(bev)) != sizeof(bev))
goto out;
if (header->needs_swap)
perf_event_header__bswap(&bev.header);
len = bev.header.size - sizeof(bev);
if (read(input, filename, len) != len)
goto out;
/*
* The a1645ce1 changeset:
*
* "perf: 'perf kvm' tool for monitoring guest performance from host"
*
* Added a field to struct build_id_event that broke the file
* format.
*
* Since the kernel build-id is the first entry, process the
* table using the old format if the well known
* '[kernel.kallsyms]' string for the kernel build-id has the
* first 4 characters chopped off (where the pid_t sits).
*/
if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
return -1;
return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
}
__event_process_build_id(&bev, filename, session);
offset += bev.header.size;
}
err = 0;
out:
return err;
}
static int perf_file_section__process(struct perf_file_section *section,
struct perf_header *ph,
int feat, int fd, void *data __used)
@@ -1854,27 +1923,23 @@ static int perf_file_section__process(struct perf_file_section *section,
return 0;
}
switch (feat) {
case HEADER_TRACE_INFO:
trace_report(fd, false);
break;
case HEADER_BUILD_ID:
if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
pr_debug("Failed to read buildids, continuing...\n");
break;
default:
break;
}
if (!feat_ops[feat].process)
return 0;
return 0;
return feat_ops[feat].process(section, ph, feat, fd);
}
static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
struct perf_header *ph, int fd,
bool repipe)
{
if (readn(fd, header, sizeof(*header)) <= 0 ||
memcmp(&header->magic, __perf_magic, sizeof(header->magic)))
int ret;
ret = readn(fd, header, sizeof(*header));
if (ret <= 0)
return -1;
if (check_magic_endian(&header->magic, NULL, ph) < 0)
return -1;
if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
tools/perf/util/hist.h
+1
View File
@@ -32,6 +32,7 @@ struct events_stats {
u32 nr_unknown_events;
u32 nr_invalid_chains;
u32 nr_unknown_id;
u32 nr_unprocessable_samples;
};
enum hist_column {
tools/perf/util/include/linux/bitmap.h
+11
View File
@@ -5,6 +5,8 @@
#include <linux/bitops.h>
int __bitmap_weight(const unsigned long *bitmap, int bits);
void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits);
#define BITMAP_LAST_WORD_MASK(nbits) \
( \
@@ -32,4 +34,13 @@ static inline int bitmap_weight(const unsigned long *src, int nbits)
return __bitmap_weight(src, nbits);
}
static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (small_const_nbits(nbits))
*dst = *src1 | *src2;
else
__bitmap_or(dst, src1, src2, nbits);
}
#endif /* _PERF_BITOPS_H */

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