Commit 6b118e92 authored Jul 30, 2012 by David Ahern Committed by Arnaldo Carvalho de Melo Aug 03, 2012

perf kvm top: Limit guest kernel info message to once



'perf kvm top' shows a continual flurry of:
    Can't find guest [5201]'s kernel information

if it can't find the guest info and with a lot of VMs running a user has no
chance of reading them all. Limit message to once per guest.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1343709095-7089-5-git-send-email-dsahern@gmail.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 70b40c4a

tools/perf/builtin-top.c

+11 −2

Original line number	Diff line number	Diff line
		@@ -38,6 +38,7 @@
		#include "util/cpumap.h"
		#include "util/xyarray.h"
		#include "util/sort.h"
		#include "util/intlist.h"

		#include "util/debug.h"

		@@ -706,8 +707,16 @@ static void perf_event__process_sample(struct perf_tool *tool,
		int err;

		if (!machine && perf_guest) {
		static struct intlist *seen;

		if (!seen)
		seen = intlist__new();

		if (!intlist__has_entry(seen, event->ip.pid)) {
		pr_err("Can't find guest [%d]'s kernel information\n",
		event->ip.pid);
		intlist__add(seen, event->ip.pid);
		}
		return;
		}