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authorDavid Ahern <dsahern@gmail.com>2012-07-31 00:31:35 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-08-03 09:43:47 -0400
commit6b118e92cc78ccef7b54a296158d4738fd377bcc (patch)
treeb1c42124f171114af6db8b12994c0f926f31f607 /tools/perf/builtin-top.c
parent70b40c4a43ddfcf7a06dad4be32ff1dd2b62be09 (diff)
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>
Diffstat (limited to 'tools/perf/builtin-top.c')
-rw-r--r--tools/perf/builtin-top.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 34096275a7b5..68cd61ef6ac5 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -38,6 +38,7 @@
38#include "util/cpumap.h" 38#include "util/cpumap.h"
39#include "util/xyarray.h" 39#include "util/xyarray.h"
40#include "util/sort.h" 40#include "util/sort.h"
41#include "util/intlist.h"
41 42
42#include "util/debug.h" 43#include "util/debug.h"
43 44
@@ -706,8 +707,16 @@ static void perf_event__process_sample(struct perf_tool *tool,
706 int err; 707 int err;
707 708
708 if (!machine && perf_guest) { 709 if (!machine && perf_guest) {
709 pr_err("Can't find guest [%d]'s kernel information\n", 710 static struct intlist *seen;
710 event->ip.pid); 711
712 if (!seen)
713 seen = intlist__new();
714
715 if (!intlist__has_entry(seen, event->ip.pid)) {
716 pr_err("Can't find guest [%d]'s kernel information\n",
717 event->ip.pid);
718 intlist__add(seen, event->ip.pid);
719 }
711 return; 720 return;
712 } 721 }
713 722