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perf: 'perf kvm' tool for monitoring guest performance from host

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Here is the patch of userspace perf tool.

Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Zhang, Yanmin 2010-04-19 13:32:50 +08:00 • committed by Avi Kivity
parent ff9d07a0e7
commit a1645ce12a
30 changed files with 1407 additions and 316 deletions
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75
tools/perf/builtin-top.c
View file

@ -420,8 +420,9 @@ static double sym_weight(const struct sym_entry *sym)
}
static long samples;
static long userspace_samples;
static long kernel_samples, us_samples;
static long exact_samples;
static long guest_us_samples, guest_kernel_samples;
static const char CONSOLE_CLEAR[] = "";
static void __list_insert_active_sym(struct sym_entry *syme)
@ -461,7 +462,10 @@ static void print_sym_table(void)
int printed = 0, j;
int counter, snap = !display_weighted ? sym_counter : 0;
float samples_per_sec = samples/delay_secs;
float ksamples_per_sec = (samples-userspace_samples)/delay_secs;
float ksamples_per_sec = kernel_samples/delay_secs;
float us_samples_per_sec = (us_samples)/delay_secs;
float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
float esamples_percent = (100.0*exact_samples)/samples;
float sum_ksamples = 0.0;
struct sym_entry *syme, *n;
@ -470,7 +474,8 @@ static void print_sym_table(void)
int sym_width = 0, dso_width = 0, dso_short_width = 0;
const int win_width = winsize.ws_col - 1;
samples = userspace_samples = exact_samples = 0;
samples = us_samples = kernel_samples = exact_samples = 0;
guest_kernel_samples = guest_us_samples = 0;
/* Sort the active symbols */
pthread_mutex_lock(&active_symbols_lock);
@ -501,10 +506,30 @@ static void print_sym_table(void)
puts(CONSOLE_CLEAR);
printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% exact: %4.1f%% [",
samples_per_sec,
100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)),
esamples_percent);
if (!perf_guest) {
printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
" exact: %4.1f%% [",
samples_per_sec,
100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
samples_per_sec)),
esamples_percent);
} else {
printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
" guest kernel:%4.1f%% guest us:%4.1f%%"
" exact: %4.1f%% [",
samples_per_sec,
100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
samples_per_sec)),
100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
samples_per_sec)),
100.0 - (100.0 * ((samples_per_sec -
guest_kernel_samples_per_sec) /
samples_per_sec)),
100.0 - (100.0 * ((samples_per_sec -
guest_us_samples_per_sec) /
samples_per_sec)),
esamples_percent);
}
if (nr_counters == 1 || !display_weighted) {
printf("%Ld", (u64)attrs[0].sample_period);
@ -597,7 +622,6 @@ static void print_sym_table(void)
syme = rb_entry(nd, struct sym_entry, rb_node);
sym = sym_entry__symbol(syme);
if (++printed > print_entries || (int)syme->snap_count < count_filter)
continue;
@ -761,7 +785,7 @@ static int key_mapped(int c)
return 0;
}
static void handle_keypress(int c)
static void handle_keypress(struct perf_session *session, int c)
{
if (!key_mapped(c)) {
struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
@ -830,7 +854,7 @@ static void handle_keypress(int c)
case 'Q':
printf("exiting.\n");
if (dump_symtab)
dsos__fprintf(stderr);
dsos__fprintf(&session->kerninfo_root, stderr);
exit(0);
case 's':
prompt_symbol(&sym_filter_entry, "Enter details symbol");
@ -866,6 +890,7 @@ static void *display_thread(void *arg __used)
struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
struct termios tc, save;
int delay_msecs, c;
struct perf_session *session = (struct perf_session *) arg;
tcgetattr(0, &save);
tc = save;
@ -886,7 +911,7 @@ repeat:
c = getc(stdin);
tcsetattr(0, TCSAFLUSH, &save);
handle_keypress(c);
handle_keypress(session, c);
goto repeat;
return NULL;
@ -957,24 +982,46 @@ static void event__process_sample(const event_t *self,
u64 ip = self->ip.ip;
struct sym_entry *syme;
struct addr_location al;
struct kernel_info *kerninfo;
u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
++samples;
switch (origin) {
case PERF_RECORD_MISC_USER:
++userspace_samples;
++us_samples;
if (hide_user_symbols)
return;
kerninfo = kerninfo__findhost(&session->kerninfo_root);
break;
case PERF_RECORD_MISC_KERNEL:
++kernel_samples;
if (hide_kernel_symbols)
return;
kerninfo = kerninfo__findhost(&session->kerninfo_root);
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
++guest_kernel_samples;
kerninfo = kerninfo__find(&session->kerninfo_root,
self->ip.pid);
break;
case PERF_RECORD_MISC_GUEST_USER:
++guest_us_samples;
/*
* TODO: we don't process guest user from host side
* except simple counting.
*/
return;
default:
return;
}
if (!kerninfo && perf_guest) {
pr_err("Can't find guest [%d]'s kernel information\n",
self->ip.pid);
return;
}
if (self->header.misc & PERF_RECORD_MISC_EXACT)
exact_samples++;
@ -994,7 +1041,7 @@ static void event__process_sample(const event_t *self,
* --hide-kernel-symbols, even if the user specifies an
* invalid --vmlinux ;-)
*/
if (al.map == session->vmlinux_maps[MAP__FUNCTION] &&
if (al.map == kerninfo->vmlinux_maps[MAP__FUNCTION] &&
RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
pr_err("The %s file can't be used\n",
symbol_conf.vmlinux_name);
@ -1261,7 +1308,7 @@ static int __cmd_top(void)
perf_session__mmap_read(session);
if (pthread_create(&thread, NULL, display_thread, NULL)) {
if (pthread_create(&thread, NULL, display_thread, session)) {
printf("Could not create display thread.\n");
exit(-1);
}