On 2/27/13 7:21 AM, Dongsoo Nathaniel Kim wrote:
Hi,
I'm trying to profile kvm guest and host as well.
I checked out v3.8 vanilla kernel and built bundled perf tool.
(commit 19f949f52599ba7c3f67a5897ac6be14bfcb1200)
Here is my command line:
sudo perf kvm --host --guest --guestmount=/tmp/guestmount record -o
my.perf.data
(I mounted guest instance on /tmp/guestmount using sshfs)
and perf gets terminated immediately and no clue but segfault message in
dmesg:
[11618.130483] perf[39937]: segfault at 30 ip 00007fed26de1121 sp
00007fff0394c258 error 4 in libc-2.15.so[7fed26d58000+1b5000]
Any idea? Can too many processor core cause this problem?
Does this solve the problem for you?
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index ca3f80e..e55701d 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -973,7 +973,7 @@ __cmd_buildid_list(const char *file_name, int argc,
const char **argv)
int cmd_kvm(int argc, const char **argv, const char *prefix
__maybe_unused)
{
- const char *file_name;
+ const char *file_name = NULL;
const struct option kvm_options[] = {
OPT_STRING('i', "input", &file_name, "file",
--
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