perf: 'perf kvm' tool for monitoring guest performance from host
Here is the patch of userspace perf tool.
Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 3a1d94d..207e860 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -33,7 +33,7 @@
return -ENOMEM;
if (hit)
- he->count += count;
+ __perf_session__add_count(he, al, count);
return 0;
}
@@ -225,6 +225,10 @@
input_new = argv[1];
} else
input_new = argv[0];
+ } else if (symbol_conf.default_guest_vmlinux_name ||
+ symbol_conf.default_guest_kallsyms) {
+ input_old = "perf.data.host";
+ input_new = "perf.data.guest";
}
symbol_conf.exclude_other = false;