Messages in this thread Patch in this message | | | From | David Ahern <> | Subject | [PATCH 4/4] perf kvm top: limit guest kernel info message to once | Date | Mon, 30 Jul 2012 22:31:35 -0600 |
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'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: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> --- tools/perf/builtin-top.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 35e86c6..0687c82 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -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) { - pr_err("Can't find guest [%d]'s kernel information\n", - event->ip.pid); + 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; } -- 1.7.10.1
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