perf: 'perf kvm' tool for monitoring guest performance from host
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>
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 40f24dd..dfd7ea7 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -420,8 +420,9 @@
}
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[] = "[H[2J";
static void __list_insert_active_sym(struct sym_entry *syme)
@@ -461,7 +462,10 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
c = getc(stdin);
tcsetattr(0, TCSAFLUSH, &save);
- handle_keypress(c);
+ handle_keypress(session, c);
goto repeat;
return NULL;
@@ -957,24 +982,46 @@
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 @@
* --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 @@
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);
}