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-kmem.c b/tools/perf/builtin-kmem.c
index 513aa8a..db474bb 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -351,6 +351,7 @@
int n_lines, int is_caller)
{
struct rb_node *next;
+ struct kernel_info *kerninfo;
printf("%.102s\n", graph_dotted_line);
printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
@@ -359,10 +360,16 @@
next = rb_first(root);
+ kerninfo = kerninfo__findhost(&session->kerninfo_root);
+ if (!kerninfo) {
+ pr_err("__print_result: couldn't find kernel information\n");
+ return;
+ }
while (next && n_lines--) {
struct alloc_stat *data = rb_entry(next, struct alloc_stat,
node);
struct symbol *sym = NULL;
+ struct map_groups *kmaps = &kerninfo->kmaps;
struct map *map;
char buf[BUFSIZ];
u64 addr;
@@ -370,8 +377,8 @@
if (is_caller) {
addr = data->call_site;
if (!raw_ip)
- sym = map_groups__find_function(&session->kmaps,
- addr, &map, NULL);
+ sym = map_groups__find_function(kmaps, addr,
+ &map, NULL);
} else
addr = data->ptr;