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monitor.c
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monitor.c
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#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <time.h>
#include <pthread.h>
#include <signal.h>
#include <ctype.h>
#define _GNU_SOURCE
#include <unistd.h>
#include <dirent.h>
#include <linux/perf_event.h>
#include <sys/time.h>
#include <linux/kvm.h>
#include <sys/ioctl.h>
#include <sys/prctl.h>
#include <sys/utsname.h>
#include <sys/resource.h>
#include <sys/signalfd.h>
#include <sys/wait.h>
#if defined(__i386__) || defined(__x86_64__)
#include <cpuid.h>
#endif
#include <linux/thread_map.h>
#include <linux/cgroup.h>
#include <trace_helpers.h>
#include <monitor.h>
#include <tep.h>
#include <timer.h>
#include <stack_helpers.h>
#include <api/fs/fs.h>
static int daylight_active;
static unsigned int page_size;
struct event_poll *main_epoll = NULL;
struct list_head prof_dev_list = LIST_HEAD_INIT(prof_dev_list);
struct monitor *monitors_list = NULL;
struct monitor *monitor = NULL;
void monitor_register(struct monitor *m)
{
m->next = monitors_list;
monitors_list = m;
}
struct monitor * monitor_find(const char *name)
{
struct monitor *m = monitors_list;
while(m) {
if (!strcmp(m->name, name))
return m;
m = m->next;
}
return NULL;
}
struct monitor *monitor_next(struct monitor *m)
{
if (!m)
return monitors_list;
else
return m->next;
}
int prof_dev_nr_ins(struct prof_dev *dev)
{
int nr_ins;
nr_ins = perf_cpu_map__nr(dev->cpus);
if (perf_cpu_map__empty(dev->cpus))
nr_ins = perf_thread_map__nr(dev->threads);
return nr_ins;
}
int prof_dev_ins_cpu(struct prof_dev *dev, int ins)
{
return perf_cpu_map__cpu(dev->cpus, ins);
}
int prof_dev_ins_thread(struct prof_dev *dev, int ins)
{
return perf_thread_map__pid(dev->threads, ins);
}
int prof_dev_ins_oncpu(struct prof_dev *dev)
{
return !perf_cpu_map__empty(dev->cpus);
}
int main_epoll_add(int fd, unsigned int events, void *ptr, handle_event handle)
{
return event_poll__add(main_epoll, fd, events, ptr, handle);
}
int main_epoll_del(int fd)
{
return event_poll__del(main_epoll, fd);
}
/******************************************************
perf-prof argc argv
******************************************************/
struct env env;
static volatile int running = 0;
const char *main_program_version = PROGRAME " 1.4";
enum {
LONG_OPT_start = 500,
LONG_OPT_than,
LONG_OPT_only_than,
LONG_OPT_lower,
LONG_OPT_detail,
LONG_OPT_period,
};
static int workload_prepare(struct workload *workload, char *argv[]);
/**
* Parses a string into ns. The number stored at @ptr is
* potentially suffixed with s, ms, us, ns.
*/
static unsigned long nsparse(const char *ptr, char **retptr)
{
char *endptr; /* local pointer to end of parsed string */
unsigned long ret = strtoul(ptr, &endptr, 10);
unsigned long tmp = ret;
switch (*endptr) {
case 'S':
case 's':
tmp *= 1000;
endptr--;
/* fall through */
case 'M':
case 'm':
tmp *= 1000;
/* fall through */
case 'U':
case 'u':
tmp *= 1000;
/* fall through */
case 'N':
case 'n':
endptr++;
if (*endptr == 's') {
endptr++;
ret = tmp;
}
default:
break;
}
if (retptr)
*retptr = endptr;
return ret;
}
static void detail_parse(const char *s)
{
if (strcmp(s, "samecpu") == 0)
env.samecpu = true;
else if (strcmp(s, "samepid") == 0)
env.samepid = true;
else if (strcmp(s, "sametid") == 0)
env.sametid = true;
else if (strcmp(s, "samekey") == 0)
env.samekey = true;
else if (strncmp(s, "hide<", 5) == 0)
env.hide_than = nsparse(s+5, NULL);
else if (s[0] == '-')
env.before_event1 = nsparse(s+1, NULL);
else
env.after_event2 = nsparse(s, NULL);
}
static int parse_arg(int key, char *arg)
{
switch (key) {
case 'e':
env.events = realloc(env.events, (env.nr_events + 1) * sizeof(*env.events));
env.events[env.nr_events] = strdup(arg);
if (env.nr_events == 0)
env.event = env.events[0];
env.nr_events ++;
break;
case LONG_OPT_only_than:
env.only_print_greater_than = true;
// fall through
case LONG_OPT_than:
env.greater_than = nsparse(arg, NULL);
break;
case LONG_OPT_lower:
env.lower_than = nsparse(arg, NULL);
break;
case LONG_OPT_detail:
env.detail = true;
if (arg) {
char *ss = strdup(arg);
char *sep, *s = ss;
while ((sep = strchr(s, ',')) != NULL) {
*sep = '\0';
detail_parse(s);
s = sep + 1;
}
if (*s)
detail_parse(s);
free(ss);
}
break;
case LONG_OPT_period:
env.sample_period = nsparse(arg, NULL);
break;
case 'V':
printf("%s\n", main_program_version);
exit(0);
default:
break;
}
return 0;
}
static int parse_help_cb(const struct option *opt, const char *arg, int unset)
{
help();
return 0;
}
static int parse_arg_cb(const struct option *opt, const char *arg, int unset)
{
return parse_arg(opt->short_name, (char *)arg);
}
static void compgen_events(char **evt_list, int evt_num, void *opaque)
{
struct {
char *prefix;
const char *match;
int skiplen;
int comp_type;
} *op = opaque;
const char *prefix = op->prefix ?: "";
char *prev = NULL, *found;
int match_len = op->match ? strlen(op->match) : 0;
int i, j, matched = 0;
unsigned int maxprefix = -1;
if (match_len == 0) {
for (i = 0; i < evt_num; i++)
printf("'%s%s'\n", prefix, evt_list[i]);
return;
}
/*
# COMP_TYPE Need prefix? Substring matching? matched==1
# 9 [Tab] Y Y (Prefix first) Output ','
# ? [Tab][Tab] N Y Output ','
# % menu-complete Y Y Output ','
# * insert-completions Y Y (!prefix) No output ','
#
# ! show-all-if-ambiguous Same as [Tab][Tab]
# @ show-all-if-unmodified Same as [Tab][Tab]
*/
// ![Tab]: [Tab][Tab], menu-complete, etc.
// substring matching: strstr.
if (op->comp_type != 9) {
for (i = 0; i < evt_num; i++)
if (strstr(evt_list[i], op->match) != NULL) {
if (op->comp_type != '*')
printf("'%s%s'\n", prefix, evt_list[i] + op->skiplen);
else if (!op->prefix)
printf("'%s'\n", evt_list[i]);
found = evt_list[i];
matched++;
}
if (matched == 1 && op->comp_type != '*')
printf("'%s%s,'\n", prefix, found + op->skiplen);
return;
}
// [Tab] prefix matching: strncmp.
for (i = 0; i < evt_num; i++)
if (strncmp(evt_list[i], op->match, match_len) == 0)
matched++;
if (matched != 0) {
j = matched;
for (i = 0; j; i++)
if (strncmp(evt_list[i], op->match, match_len) == 0) {
printf("'%s%s'\n", prefix, evt_list[i] + op->skiplen);
if (matched == 1)
printf("'%s%s,'\n", prefix, evt_list[i] + op->skiplen);
j--;
}
return;
}
// [Tab] substring matching. The longest common prefix must contain `op->match'.
for (i = 0; i < evt_num; i++)
if ((found = strstr(evt_list[i], op->match)) != NULL) {
matched++;
if (prev) {
const char *s1 = prev, *s2 = evt_list[i];
j = 0; while (*s1++ == *s2++) j++;
if (j < maxprefix) maxprefix = j;
if (maxprefix < found - evt_list[i] + match_len)
goto failed;
}
prev = evt_list[i];
}
if (matched != 0) {
j = matched;
for (i = 0; j; i++)
if (strstr(evt_list[i], op->match) != NULL) {
printf("'%s%s'\n", prefix, evt_list[i] + op->skiplen);
if (matched == 1)
printf("'%s%s,'\n", prefix, evt_list[i] + op->skiplen);
j--;
}
return;
}
failed:
printf("'%s%s'\n", prefix, op->match + op->skiplen);
printf("'%s%s,'\n", prefix, op->match + op->skiplen);
}
static int compgen_arg(const struct option *opt, const char *arg, int comp_type)
{
const char *comma;
char *prefix = NULL;
char *COMP_SKIPLEN = getenv("COMP_SKIPLEN");
int skiplen = 0;
switch (opt->short_name) {
case 'e':
comma = strrchr(arg, ',');
if (comp_type == 9 || comp_type == '%' || comp_type == '*') {
if (COMP_SKIPLEN) {
/*
* If option parameter contains "$COMP_WORDBREAKS" characters, it will be separated
* into multiple words. But completion only operates on the word pointed to by
* COMP_POINT.
* COMP_SKIPLEN represents the length of the previous word, which needs to be skipped
* when perf-prof outputs completion.
*
* perf-prof trace -e sched:sched_wakeup/pid>1/,sch[TAB]
* COMP_WORDBREAKS=" \n\"'><=;|&(:"
* COMP_WORDS='(... [2]="-e" [3]="sched" [4]=":" [5]="sched_wakeup/pid" [6]=">" [7]="1/,sch")'
* COMP_SKIPLEN=23 (Contains the length of COMP_WORDS [3], [4], [5], [6])
* OUTPUT='([0]="1/,sched:sched_kthread_stop" ...)'
*/
int comp_skiplen = atoi(COMP_SKIPLEN);
const char *skip = arg + comp_skiplen;
if (comma) {
if (skip < comma) {
arg = skip;
goto make_prefix;
}
arg = comma + 1;
comma = NULL;
}
if (arg < skip)
skiplen = skip - arg;
} else if (comma) {
make_prefix:
prefix = strndup(arg, comma - arg + 1);
}
} {
struct {
char *prefix;
const char *match;
int skiplen;
int comp_type;
} op = {
.prefix = prefix,
.match = comma ? comma + 1 : arg,
.skiplen = skiplen,
.comp_type = comp_type,
};
print_tracepoint_events(compgen_events, (void *)&op);
}
if (prefix) free(prefix);
break;
default:
break;
}
return 0;
}
#define OPT_BOOL_NONEG(s, l, v, h) { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_INT_NONEG(s, l, v, a, h) { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_INT_NONEG_SET(s, l, v, os, a, h) { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .set = check_vtype(os, bool *), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_UINT_NONEG(s, l, v, a, h) { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_LONG_NONEG(s, l, v, a, h) { .type = OPTION_LONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, long *), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_ULONG_NONEG(s, l, v, a, h) { .type = OPTION_ULONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned long *), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_U64_NONEG(s, l, v, a, h) { .type = OPTION_U64, .short_name = (s), .long_name = (l), .value = check_vtype(v, u64 *), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG }
#define OPT_STRDUP_NONEG(s, l, v, a, h) { .type = OPTION_STRING, .short_name = (s), .long_name = (l), .value = check_vtype(v, char **), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG | PARSE_OPT_NOEMPTY }
#define OPT_PARSE_NONEG(s, l, v, a, h) \
{ .type = OPTION_CALLBACK, .short_name = (BUILD_BUG_ON_ZERO(s==0) + s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG, .callback = (parse_arg_cb), .compgen = (compgen_arg) }
#define OPT_PARSE_NOARG(s, l, v, a, h) \
{ .type = OPTION_CALLBACK, .short_name = (BUILD_BUG_ON_ZERO(s==0) + s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG | PARSE_OPT_NOARG, .callback = (parse_arg_cb) }
#define OPT_PARSE_OPTARG(s, l, v, a, h) \
{ .type = OPTION_CALLBACK, .short_name = (BUILD_BUG_ON_ZERO(s==0) + s), .long_name = (l), .value = (v), .argh = (a), .help = (h), .flags = PARSE_OPT_NONEG | PARSE_OPT_OPTARG, .callback = (parse_arg_cb) }
#define OPT_INT_OPTARG(s, l, v, d, a, h) \
{ .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .argh = (a), .defval = (intptr_t)(d), .help = (h), .flags = PARSE_OPT_NONEG | PARSE_OPT_OPTARG }
#define OPT_INT_OPTARG_SET(s, l, v, os, d, a, h) \
{ .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .set = check_vtype(os, bool *), .argh = (a), .defval = (intptr_t)(d), .help = (h), .flags = PARSE_OPT_NONEG | PARSE_OPT_OPTARG }
#define OPT_HELP() \
{ .type = OPTION_CALLBACK, .short_name = ('h'), .long_name = ("help"), .help = ("Give this help list"), .flags = PARSE_OPT_NONEG | PARSE_OPT_NOARG, .callback = (parse_help_cb) }
struct option main_options[] = {
OPT_GROUP("OPTION:"),
OPT_STRDUP_NONEG('C', "cpus", &env.cpumask, "cpu[-cpu],...", "Monitor the specified CPU, Dflt: all cpu"),
OPT_STRDUP_NONEG('p', "pids", &env.pids, "pid,...", "Attach to processes"),
OPT_STRDUP_NONEG('t', "tids", &env.tids, "tid,...", "Attach to threads"),
OPT_STRDUP_NONEG( 0 , "cgroups", &env.cgroups, "cgroup,...", "Attach to cgroups, support regular expression."),
OPT_BOOL_NONEG ( 0 , "inherit", &env.inherit, "Child tasks do inherit counters."),
OPT_INT_NONEG_SET( 0 , "watermark", &env.watermark, &env.watermark_set, "0-100", "Wake up "PROGRAME" watermark."),
OPT_INT_NONEG ('i', "interval", &env.interval, "ms", "Interval, Unit: ms"),
OPT_STRDUP_NONEG('o', "output", &env.output, "file", "Output file name"),
OPT_BOOL_NONEG ( 0 , "order", &env.order, "Order events by timestamp."),
OPT_INT_NONEG ('m', "mmap-pages", &env.mmap_pages, "pages", "Number of mmap data pages and AUX area tracing mmap pages"),
OPT_LONG_NONEG ('N', "exit-N", &env.exit_n, "N", "Exit after N events have been sampled."),
OPT_BOOL_NONEG ( 0 , "tsc", &env.tsc, "Convert perf clock to tsc."),
OPT_STRDUP_NONEG( 0 , "kvmclock", &env.kvmclock, "uuid", "Convert perf clock to Guest's kvmclock."),
OPT_U64_NONEG ( 0 ,"clock-offset", &env.clock_offset, NULL, "Sum with clock-offset to get the final clock."),
OPT_INT_NONEG ( 0 , "usage-self", &env.usage_self, "ms", "Periodically output the CPU usage of perf-prof itself, Unit: ms"),
OPT_INT_NONEG ( 0 ,"sampling-limit", &env.sampling_limit, "N", "Limit the number of samples per second per instance."),
OPT_STRDUP_NONEG( 0 , "perfeval-cpus", &env.perfeval_cpus, "cpu", "Performance evaluation cpu list."),
OPT_STRDUP_NONEG( 0 , "perfeval-pids", &env.perfeval_pids, "pid", "Performance evaluation pid list."),
OPT_PARSE_NOARG ('V', "version", NULL, NULL, "Version info"),
OPT__VERBOSITY(&env.verbose),
OPT_HELP(),
OPT_GROUP("FILTER OPTION:"),
OPT_BOOL_NONEG ('G', "exclude-host", &env.exclude_host, "Monitor GUEST, exclude host"),
OPT_BOOL_NONEG ( 0 , "exclude-guest", &env.exclude_guest, "exclude guest"),
OPT_BOOL_NONEG ( 0 , "exclude-user", &env.exclude_user, "exclude user"),
OPT_BOOL_NONEG ( 0 , "exclude-kernel", &env.exclude_kernel, "exclude kernel"),
OPT_BOOLEAN_SET ( 0 , "user-callchain", &env.user_callchain, &env.user_callchain_set, "include user callchains, no- prefix to exclude"),
OPT_BOOLEAN_SET ( 0 , "kernel-callchain", &env.kernel_callchain, &env.kernel_callchain_set, "include kernel callchains, no- prefix to exclude"),
OPT_INT_OPTARG_SET( 0 , "irqs_disabled", &env.irqs_disabled, &env.irqs_disabled_set, 1, "0|1", "ebpf, irqs disabled or not."),
OPT_INT_OPTARG_SET( 0 , "tif_need_resched", &env.tif_need_resched, &env.tif_need_resched_set, 1, "0|1", "ebpf, TIF_NEED_RESCHED is set or not."),
OPT_INT_NONEG_SET ( 0 , "exclude_pid", &env.exclude_pid, &env.exclude_pid_set, "pid", "ebpf, exclude pid"),
OPT_INT_NONEG_SET ( 0 , "nr_running_min", &env.nr_running_min, &env.nr_running_min_set, NULL, "ebpf, minimum number of running processes for CPU runqueue."),
OPT_INT_NONEG_SET ( 0 , "nr_running_max", &env.nr_running_max, &env.nr_running_max_set, NULL, "ebpf, maximum number of running processes for CPU runqueue."),
OPT_GROUP("PROFILER OPTION:"),
OPT_PARSE_NONEG ('e', "event", NULL, "EVENT,...", "Event selector. use '"PROGRAME" list' to list available tp events.\n"
" EVENT,EVENT,...\n"
" EVENT: sys:name[/filter/ATTR/ATTR/.../]\n"
" profiler[/option/ATTR/ATTR/.../]\n"
" kprobe:func[/filter/ATTR/ATTR/.../]\n"
" uprobe:func@\"file\"[/filter/ATTR/ATTR/.../]\n"
" filter: trace events filter\n"
" ATTR:\n"
" stack: sample_type PERF_SAMPLE_CALLCHAIN\n"
" max-stack=int : sample_max_stack\n"
" alias=str: event alias\n"
" exec=EXPR: a public expression executed by any profiler\n"
" cpus=cpu[-cpu]: attach to a different cpu list.\n"
" top-by=EXPR: add to top, sort by this field\n"
" top-add=EXPR: add to top\n"
" comm=EXPR: top, show COMM\n"
" ptr=EXPR: kmemleak, ptr field, Dflt: ptr=ptr\n"
" size=EXPR: kmemleak, size field, Dflt: size=bytes_alloc\n"
" num=EXPR: num-dist, num field\n"
" key=EXPR: key for multiple events: top, multi-trace\n"
" role=EXPR: multi-trace, Bit 0: as event1, Bit 1: as event2.\n"
" untraced: multi-trace, auxiliary, no two-event analysis\n"
" trigger: multi-trace, use events to trigger interval output\n"
" vm=uuid: get the mapping from Guest vcpu to Host tid\n"
" push=[IP:]PORT: push events to the local broadcast server IP:PORT\n"
" push=chardev: push events to chardev, e.g., /dev/virtio-ports/*\n"
" push=file: push events to file\n"
" pull=[IP:]PORT: pull events from server IP:PORT\n"
" pull=chardev: pull events from chardev\n"
" pull=file: pull events from file\n"
" EXPR:\n"
" C expression. See `"PROGRAME" expr -h` for more information."
),
OPT_INT_NONEG ('F', "freq", &env.freq, NULL, "Profile at this frequency, No profile: 0"),
OPT_STRDUP_NONEG('k', "key", &env.key, "str", "Key for series events"),
OPT_STRDUP_NONEG( 0 , "filter", &env.filter, "filter", "Event filter/comm filter"),
OPT_PARSE_NONEG (LONG_OPT_period, "period", &env.sample_period, "ns", "Sample period, Unit: s/ms/us/*ns"),
OPT_STRDUP_NONEG(0, "impl", &env.impl, "impl", "Implementation of two-event analysis class. Dflt: delay.\n"
" delay: latency distribution between two events\n"
" pair: determine if two events are paired\n"
" kmemprof: profile memory allocated and freed bytes\n"
" syscalls: syscall delay\n"
" call: analyze function calls, only for nested-trace.\n"
" call-delay: call + delay, only for nested-trace."),
OPT_BOOLEAN_SET ('S', "interruptible", &env.interruptible, &env.interruptible_set, "TASK_INTERRUPTIBLE, no- prefix to exclude"),
OPT_BOOL_NONEG ('D', "uninterruptible", &env.uninterruptible, "TASK_UNINTERRUPTIBLE"),
OPT_PARSE_NONEG ( LONG_OPT_than, "than", &env.greater_than, "ns", "Greater than specified time, Unit: s/ms/us/*ns/percent"),
OPT_PARSE_NONEG ( LONG_OPT_only_than, "only-than", &env.greater_than,"ns", "Only print those that are greater than the specified time."),
OPT_PARSE_NONEG ( LONG_OPT_lower, "lower", &env.lower_than, "ns", "Lower than specified time, Unit: s/ms/us/*ns"),
OPT_STRDUP_NONEG( 0 , "alloc", &env.tp_alloc, "EVENT", "Memory alloc tracepoint/kprobe/uprobe"),
OPT_STRDUP_NONEG( 0 , "free", &env.tp_free, "EVENT", "Memory free tracepoint/kprobe/uprobe"),
OPT_BOOL_NONEG ( 0 , "syscalls", &env.syscalls, "Trace syscalls"),
OPT_BOOL_NONEG ( 0 , "perins", &env.perins, "Print per instance stat"),
OPT_BOOL_NONEG ('g', "call-graph", &env.callchain, "Enable call-graph recording"),
OPT_STRDUP_NONEG( 0 , "flame-graph", &env.flame_graph, "file", "Specify the folded stack file."),
OPT_STRDUP_NONEG( 0 , "heatmap", &env.heatmap, "file", "Specify the output latency file."),
OPT_PARSE_OPTARG( LONG_OPT_detail, "detail", NULL, "-N,+N,hide<N,same*",
"More detailed information output.\n"
"For multi-trace profiler:\n"
" -N: Before event1, print events within N nanoseconds.\n"
" +N: After event2, print events within N nanoseconds.\n"
"hide<N: Hide event intervals less than N nanoseconds.\n"
"samecpu: Only show events with the same cpu as event1 or event2.\n"
"samepid: Only show events with the same pid as event1 or event2.\n"
"sametid: Only show events with the same tid as event1 or event2.\n"
"samekey: Only show events with the same key as event1 or event2."),
OPT_INT_NONEG ('T', "trigger", &env.trigger_freq, NULL, "Trigger Threshold, No trigger: 0"),
OPT_BOOL_NONEG ( 0 , "test", &env.test, "Split-lock test verification"),
OPT_STRDUP_NONEG( 0 , "symbols", &env.symbols, NULL, "Maps addresses to symbol names.\n"
"Similar to pprof --symbols."),
OPT_STRDUP_NONEG('d', "device", &env.device, "device", "Block device, /dev/sdx"),
OPT_INT_NONEG ( 0 , "ldlat", &env.ldlat, "cycles", "mem-loads latency, Unit: cycles"),
OPT_BOOL_NONEG ( 0 , "overwrite", &env.overwrite, "use overwrite mode"),
OPT_BOOL_NONEG ( 0 , "spte", &env.spte, "kvmmmu: enable kvmmmu:kvm_mmu_set_spte"),
OPT_BOOL_NONEG ( 0 , "mmio", &env.mmio, "kvmmmu: enable kvmmmu:mark_mmio_spte"),
OPT_BOOL_NONEG ( 0 , "only-comm", &env.only_comm, "top: only show comm but not key"),
OPT_BOOL_NONEG ( 0 , "cycle", &env.cycle, "multi-trace: event cycle, from the last one back to the first."),
OPT_BOOL_NONEG ( 0 , "ptrace", &env.using_ptrace, "Use ptrace to track newly created threads."),
OPT_END()
};
const char * const main_usage[] = {
PROGRAME " profiler [PROFILER OPTION...] [help] [cmd [args...]]",
PROGRAME " --symbols /path/to/bin",
"",
"Profiling based on perf_event and ebpf",
NULL
};
static void free_env(struct env *e)
{
if (e->nr_events) {
while (e->nr_events--) free(e->events[e->nr_events]);
free(e->events);
}
if (e->cpumask) free(e->cpumask);
if (e->pids) free(e->pids);
if (e->tids) free(e->tids);
if (e->cgroups) free(e->cgroups);
if (e->output) free(e->output);
if (e->key) free(e->key);
if (e->filter) free(e->filter);
if (e->impl) free(e->impl);
if (e->tp_alloc) free(e->tp_alloc);
if (e->tp_free) free(e->tp_free);
if (e->flame_graph) free(e->flame_graph);
if (e->heatmap) free(e->heatmap);
if (e->symbols) free(e->symbols);
if (e->device) free(e->device);
if (e->kvmclock) free(e->kvmclock);
if (e->perfeval_cpus) free(e->perfeval_cpus);
if (e->perfeval_pids) free(e->perfeval_pids);
if (e->workload.pid > 0) {
kill(e->workload.pid, SIGTERM);
}
if (e != &env) free(e);
else
memset(e, 0, sizeof(*e));
}
struct env *clone_env(struct env *p)
{
struct env *e = malloc(sizeof(*e));
if (!e) return NULL;
*e = *p;
e->workload.cork_fd = 0;
e->workload.pid = 0;
e->help_monitor = NULL;
if (e->nr_events) {
int i;
e->events = calloc(e->nr_events, sizeof(*e->events));
e->nr_events = 0;
if (!e->events) goto failed;
for (i = 0 ; i < p->nr_events; i++) {
e->events[i] = strdup(p->events[i]);
if (!e->events[i]) goto failed;
e->nr_events ++;
}
e->event = e->events[0];
}
#define CLONE(f) if (e->f) {e->f = strdup(e->f); if (!e->f) goto failed;}
CLONE (cpumask);
CLONE (pids);
CLONE (tids);
CLONE (cgroups);
CLONE (output);
CLONE (key);
CLONE (filter);
CLONE (impl);
CLONE (tp_alloc);
CLONE (tp_free);
CLONE (flame_graph);
CLONE (heatmap);
CLONE (symbols);
CLONE (device);
CLONE (kvmclock);
CLONE (perfeval_cpus);
CLONE (perfeval_pids);
return e;
failed:
free_env(e);
return NULL;
}
void help(void)
{
int argc = 2;
const char *argv[] = {PROGRAME, "--help"};
const char * const *usagestr = main_usage;
struct monitor *m = monitor;
if (m) {
if (m->argv && m->desc) {
argc = 0;
while (m->argv[argc++] != NULL);
parse_options(argc - 1, m->argv, main_options, m->desc, PARSE_OPT_INTERNAL_HELP_NO_ORDER);
} else
parse_options(argc, argv, main_options, main_usage, PARSE_OPT_INTERNAL_HELP_NO_ORDER);
}
fprintf(stderr, "\n Usage: %s\n", *usagestr++);
while (*usagestr && **usagestr)
fprintf(stderr, " or: %s\n", *usagestr++);
while (*usagestr) {
fprintf(stderr, "%s%s\n",
**usagestr ? " " : "",
*usagestr);
usagestr++;
}
fprintf(stderr, "\n Available Profilers:\n");
while((m = monitor_next(m))) {
fprintf(stderr, " %-20s", m->name);
if (m->desc && m->desc[2] && m->desc[2][0])
fprintf(stderr, " %s\n", m->desc[2]);
else
fprintf(stderr, "\n");
}
fprintf(stderr, "\n See '%s profiler -h' for more information on a specific profiler.\n\n", PROGRAME);
exit(129);
}
static void disable_help(void)
{
struct option *opts = main_options;
for (; opts->type != OPTION_END; opts++) {
if (opts->short_name == 'h') {
opts->short_name = 0;
opts->long_name = "disable-help";
}
}
}
static void flush_main_options(profiler *p)
{
struct option *opts;
int i;
if (!p->argv)
return ;
// disable all opts
opts = main_options;
for (; opts->type != OPTION_END; opts++) {
opts->flags |= PARSE_OPT_DISABLED;
}
// enable profiler opts
opts = main_options;
for (; opts->type != OPTION_END; opts++) {
for (i = 2/*PROGRAME, "-h"*/; p->argv[i]; i ++) {
if (p->argv[i][1] == '\0' &&
opts->short_name < 256 && isalnum(opts->short_name) && /* isshort */
p->argv[i][0] == opts->short_name)
goto enable;
if (opts->long_name && strcmp(opts->long_name, p->argv[i]) == 0)
goto enable;
if (opts->type == OPTION_GROUP && strcmp(opts->help, p->argv[i]) == 0)
goto enable;
}
continue;
enable:
opts->flags &= (~PARSE_OPT_DISABLED);
}
}
#ifndef CONFIG_LIBBPF
static const char *LIBBPF_BUILD = "NO CONFIG_LIBBPF=y";
#endif
static profiler *parse_main_options(int argc, char *argv[])
{
profiler *prof = NULL;
bool stop_at_non_option = true;
bool dashdash = false;
char *COMP_TYPE = getenv("COMP_TYPE"); // Bash Completion COMP_TYPE variable
int comp_type = COMP_TYPE ? atoi(COMP_TYPE) : 0;
bool enable_optcomp = false;
#ifndef CONFIG_LIBBPF
set_option_nobuild(main_options, 0, "irqs_disabled", LIBBPF_BUILD, true);
set_option_nobuild(main_options, 0, "tif_need_resched", LIBBPF_BUILD, true);
set_option_nobuild(main_options, 0, "exclude_pid", LIBBPF_BUILD, true);
set_option_nobuild(main_options, 0, "nr_running_min", LIBBPF_BUILD, true);
set_option_nobuild(main_options, 0, "nr_running_max", LIBBPF_BUILD, true);
#endif
while (argc > 0) {
argc = parse_options(argc, (const char **)argv, main_options, main_usage,
PARSE_OPT_NO_INTERNAL_HELP | PARSE_OPT_KEEP_DASHDASH |
(enable_optcomp ? PARSE_OPT_BASH_COMPLETION : 0) |
(stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION :
PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN));
if (argc && argv[0][0] != '\0' && argv[0][0] != '-') {
struct monitor *m = monitor_find(argv[0]);
if (m != NULL) {
if (strcmp(m->name, "help") == 0)
env.help_monitor = prof;
else if (prof) {
#ifdef MULTI_PROF
struct env *e = zalloc(sizeof(struct env));
if (e) {
*e = env;
prof_dev_open(prof, e);
}
memset(&env, 0, sizeof(struct env));
#else
goto stop_at;
#endif
}
prof = m;
monitor = m; // monitor only used in help();
flush_main_options(m);
enable_optcomp = comp_type ? true : false;
continue;
} else if (comp_type) {
break;
} else stop_at: if (stop_at_non_option) {
stop_at_non_option = false;
disable_help();
continue;
}
}
if (comp_type)
break;
// --
if (argc && argv[0][0] == '-' && argv[0][1] == '-') {
argc--;
memmove(argv, argv + 1, argc * sizeof(argv[0]));
argv[argc] = NULL;
dashdash = true;
}
break;
}
if (comp_type) {
if (prof) {
if (argc == 0)
printf(prof->compgen ? "\"%s %s\"\n" : "%s%s\n", prof->name, prof->compgen ?: "");
} else {
struct monitor *m = NULL;
while((m = monitor_next(m))) {
if (!argc || argv[0][0] == '\0' ||
strncmp(m->name, argv[0], strlen(argv[0])) == 0) {
if (m->compgen && comp_type != '?')
printf("\"%s %s\"\n", m->name, m->compgen);
else
printf("%s\n", m->name);
}
}
}
exit(0);
}
if (env.symbols) {
syms__convert(stdin, stdout, env.symbols);
exit(0);
}
if (prof == NULL)
help();
if (!dashdash) {
if (prof && prof->argc_init)
argc = prof->argc_init(argc, argv);
else if (argc && env.verbose > 0) {
int i;
printf("Unparsed options:");
for (i = 0; i < argc; i ++)
printf(" %s", argv[i]);
printf("\n");
}
}
if (argc > 0) {
if (workload_prepare(&env.workload, argv) < 0)
goto failed;
}
return prof;
failed:
free_env(&env);
return NULL;
}
struct env *parse_string_options(char *str)
{
char *token;
int argc = 1; // argv[0] = "perf-prof"
char **argv = malloc((argc + 1)*sizeof(char*));
struct env *e = NULL;
token = strtok(str, " ");
while (token && argv) {
argv[argc++] = token;
argv = realloc(argv, (argc + 1)*sizeof(char*));
token = strtok(NULL, " ");
}
if (!argv)
return NULL;
memset(&env, 0, sizeof(struct env));
if (parse_main_options(argc, argv)) {
e = malloc(sizeof(*e));
if (e) *e = env;
}
free(argv);
return e;
}
static char *perf_type_str(int type)
{
static int nr_types = 0;
static char **perf_types = NULL;
if (!nr_types) {
char path[PATH_MAX];
struct dirent **namelist = NULL;
int i, items, n, type;
n = snprintf(path, PATH_MAX, "%s/bus/event_source/devices/", sysfs__mountpoint());
items = scandir(path, &namelist, NULL, NULL);
if (items <= 0)
return NULL;
for (i = 0; i < items; i++) {
if (namelist[i]->d_name[0] == '.')
continue;
snprintf(path+n, PATH_MAX-n, "%s/type", namelist[i]->d_name);
if (filename__read_int(path, &type) == 0) {
int nr = type + 1;
if (nr_types < nr) {
perf_types = realloc(perf_types, nr*sizeof(*perf_types));
if (!perf_types) goto failed;
memset(perf_types+nr_types, 0, (nr-nr_types)*sizeof(*perf_types));
nr_types = nr;
}
perf_types[type] = strdup(namelist[i]->d_name);
}
}
failed:
for (i = 0; i < items; i++)
free(namelist[i]);
free(namelist);
}
return type < nr_types ? perf_types[type] : NULL;
}
static void print_event(struct perf_event_attr *attr)
{
const char *str = "unknown";
if (attr->type == PERF_TYPE_HARDWARE) {
switch (attr->config) {
case PERF_COUNT_HW_CPU_CYCLES: str = "cpu-cycles"; break;
case PERF_COUNT_HW_INSTRUCTIONS: str = "instructions"; break;
case PERF_COUNT_HW_CACHE_REFERENCES: str = "cache-references"; break;
case PERF_COUNT_HW_CACHE_MISSES: str = "cache-misses"; break;
case PERF_COUNT_HW_BRANCH_INSTRUCTIONS: str = "branch-instructions"; break;
case PERF_COUNT_HW_BRANCH_MISSES: str = "branch-misses"; break;
case PERF_COUNT_HW_BUS_CYCLES: str = "bus-cycles"; break;
case PERF_COUNT_HW_STALLED_CYCLES_FRONTEND: str = "stalled-frontend"; break;
case PERF_COUNT_HW_STALLED_CYCLES_BACKEND: str = "stalled-backend"; break;
case PERF_COUNT_HW_REF_CPU_CYCLES: str = "ref-cpu-cycles"; break;
default: break;
}
printf("%s", str);
} else if (attr->type == PERF_TYPE_SOFTWARE) {
switch (attr->config) {
case PERF_COUNT_SW_CPU_CLOCK: str = "cpu-clock"; break;
case PERF_COUNT_SW_TASK_CLOCK: str = "task-clock"; break;
case PERF_COUNT_SW_PAGE_FAULTS: str = "page-faults"; break;
case PERF_COUNT_SW_CONTEXT_SWITCHES: str = "context-switches"; break;
case PERF_COUNT_SW_CPU_MIGRATIONS: str = "cpu-migrations"; break;
case PERF_COUNT_SW_PAGE_FAULTS_MIN: str = "page-faults-min"; break;
case PERF_COUNT_SW_PAGE_FAULTS_MAJ: str = "page-faults-maj"; break;
case PERF_COUNT_SW_ALIGNMENT_FAULTS: str = "alignment-faults"; break;
case PERF_COUNT_SW_EMULATION_FAULTS: str = "emulation-faults"; break;
case PERF_COUNT_SW_DUMMY: str = "dummy"; break;
case PERF_COUNT_SW_BPF_OUTPUT: str = "bpf-output"; break;
case PERF_COUNT_SW_CGROUP_SWITCHES: str = "cgroup-switches"; break;
default: break;
}
printf("%s", str);
} else if (attr->type == PERF_TYPE_TRACEPOINT) {
struct tep_event *e = tep_find_event(tep__ref(), (int)attr->config);
if (e) printf("%s:%s", e->system, e->name);
tep__unref();
} else if (attr->type == PERF_TYPE_RAW) {
printf("raw:0x%lx", (long)attr->config);
} else if (attr->type == PERF_TYPE_BREAKPOINT) {
printf("breakpoint");
} else {
printf("%s", perf_type_str(attr->type) ?: "unknown");
}
}
static void print_thread(struct perf_thread_map *threads)
{
int pid, pid_1 = -1, pid_start = -1;
int idx;
perf_thread_map__for_each_thread(pid, idx, threads) {
if (idx == 0) {
printf("%d", pid);
pid_1 = pid_start = pid;
continue;
}
// The pids are sorted from small to large and can be used to
// judge whether they are numerically continuous.
if (pid_1 + 1 != pid) {
if (pid_start == pid_1) printf(",%d", pid);
else printf("-%d,%d", pid_1, pid);
pid_start = pid;
}
pid_1 = pid;
}
if (pid_start != pid_1)
printf("-%d", pid_1);
}
static void print_dev(struct prof_dev *dev, int indent)
{
struct prof_dev *source, *child, *tmp;
struct perf_evsel *evsel, *last = NULL;
char *cpu_str = perf_cpu_map__string(dev->cpus);
printf("%*s- %s:\n", indent-4, "", dev->prof->name);
dev_printf("state: %s\n", prof_dev_state(dev));
dev_printf("cpu: %s\n", cpu_str);
dev_printf("thread: "); print_thread(dev->threads); printf("\n");
if (dev->env->workload.pid) dev_printf("workload: %d\n", dev->env->workload.pid);
dev_printf("event: ");
perf_evlist__for_each_evsel(dev->evlist, evsel) last = evsel;
perf_evlist__for_each_evsel(dev->evlist, evsel) {
struct perf_event_attr *attr = perf_evsel__attr(evsel);
print_event(attr);
if (evsel != last) printf(",");
}
printf("\n");
dev_printf("ringbuffer_size: %lu\n", (u64)dev->pages * page_size * prof_dev_nr_ins(dev));
dev_printf("users: %d\n", dev->dev_users);
dev_printf("refcount: %d\n", dev->refcount - (indent>4) /* for_each_child_dev_get */);
dev_printf("clone: %s\n", dev->clone ? "true" : "false");
if (dev->convert.need_conv) {
dev_printf("convert:");
if (dev->convert.need_conv == CONVERT_TO_TSC)
printf(" tsc");
else if (dev->convert.need_conv == CONVERT_TO_KVMCLOCK)
printf(" kvmclock");
printf(" +%lu\n", dev->env->clock_offset);