Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 17/18] perf kvm top: Limit guest kernel info message to once | Date | Fri, 3 Aug 2012 11:01:09 -0300 |
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From: David Ahern <dsahern@gmail.com>
'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> --- tools/perf/builtin-top.c | 13 +++++++++++-- 1 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 3409627..68cd61e 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; } -- 1.7.1
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