perf top: Switch to non overwrite mode
Just like 'perf record'. Warn the user when PERF_RECORD_LOST events
happen.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index ce2e50c..7f92ab7 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -464,7 +464,7 @@
rb_insert_color(&se->rb_node, tree);
}
-static void print_sym_table(void)
+static void print_sym_table(struct perf_session *session)
{
int printed = 0, j;
struct perf_evsel *counter;
@@ -513,7 +513,6 @@
puts(CONSOLE_CLEAR);
- printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
if (!perf_guest) {
printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
" exact: %4.1f%% [",
@@ -578,6 +577,12 @@
printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
+ if (session->hists.stats.total_lost != 0) {
+ color_fprintf(stdout, PERF_COLOR_RED, "WARNING:");
+ printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n",
+ session->hists.stats.total_lost);
+ }
+
if (sym_filter_entry) {
show_details(sym_filter_entry);
return;
@@ -919,7 +924,7 @@
getc(stdin);
do {
- print_sym_table();
+ print_sym_table(session);
} while (!poll(&stdin_poll, 1, delay_msecs) == 1);
c = getc(stdin);
@@ -1176,7 +1181,7 @@
}
}
- if (perf_evlist__mmap(evlist, cpus, threads, mmap_pages, true) < 0)
+ if (perf_evlist__mmap(evlist, cpus, threads, mmap_pages, false) < 0)
die("failed to mmap with %d (%s)\n", errno, strerror(errno));
}