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/util/map.c b/tools/perf/util/map.c
index 37913b2..7facd01 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -4,6 +4,7 @@
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
+#include <unistd.h>
#include "map.h"
const char *map_type__name[MAP__NR_TYPES] = {
@@ -37,9 +38,11 @@
self->map_ip = map__map_ip;
self->unmap_ip = map__unmap_ip;
RB_CLEAR_NODE(&self->rb_node);
+ self->groups = NULL;
}
-struct map *map__new(u64 start, u64 len, u64 pgoff, u32 pid, char *filename,
+struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
+ u64 pgoff, u32 pid, char *filename,
enum map_type type, char *cwd, int cwdlen)
{
struct map *self = malloc(sizeof(*self));
@@ -66,7 +69,7 @@
filename = newfilename;
}
- dso = dsos__findnew(filename);
+ dso = __dsos__findnew(dsos__list, filename);
if (dso == NULL)
goto out_delete;
@@ -242,6 +245,7 @@
self->maps[i] = RB_ROOT;
INIT_LIST_HEAD(&self->removed_maps[i]);
}
+ self->this_kerninfo = NULL;
}
void map_groups__flush(struct map_groups *self)
@@ -508,3 +512,134 @@
return NULL;
}
+
+struct kernel_info *add_new_kernel_info(struct rb_root *kerninfo_root,
+ pid_t pid, const char *root_dir)
+{
+ struct rb_node **p = &kerninfo_root->rb_node;
+ struct rb_node *parent = NULL;
+ struct kernel_info *kerninfo, *pos;
+
+ kerninfo = malloc(sizeof(struct kernel_info));
+ if (!kerninfo)
+ return NULL;
+
+ kerninfo->pid = pid;
+ map_groups__init(&kerninfo->kmaps);
+ kerninfo->root_dir = strdup(root_dir);
+ RB_CLEAR_NODE(&kerninfo->rb_node);
+ INIT_LIST_HEAD(&kerninfo->dsos__user);
+ INIT_LIST_HEAD(&kerninfo->dsos__kernel);
+ kerninfo->kmaps.this_kerninfo = kerninfo;
+
+ while (*p != NULL) {
+ parent = *p;
+ pos = rb_entry(parent, struct kernel_info, rb_node);
+ if (pid < pos->pid)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&kerninfo->rb_node, parent, p);
+ rb_insert_color(&kerninfo->rb_node, kerninfo_root);
+
+ return kerninfo;
+}
+
+struct kernel_info *kerninfo__find(struct rb_root *kerninfo_root, pid_t pid)
+{
+ struct rb_node **p = &kerninfo_root->rb_node;
+ struct rb_node *parent = NULL;
+ struct kernel_info *kerninfo;
+ struct kernel_info *default_kerninfo = NULL;
+
+ while (*p != NULL) {
+ parent = *p;
+ kerninfo = rb_entry(parent, struct kernel_info, rb_node);
+ if (pid < kerninfo->pid)
+ p = &(*p)->rb_left;
+ else if (pid > kerninfo->pid)
+ p = &(*p)->rb_right;
+ else
+ return kerninfo;
+ if (!kerninfo->pid)
+ default_kerninfo = kerninfo;
+ }
+
+ return default_kerninfo;
+}
+
+struct kernel_info *kerninfo__findhost(struct rb_root *kerninfo_root)
+{
+ struct rb_node **p = &kerninfo_root->rb_node;
+ struct rb_node *parent = NULL;
+ struct kernel_info *kerninfo;
+ pid_t pid = HOST_KERNEL_ID;
+
+ while (*p != NULL) {
+ parent = *p;
+ kerninfo = rb_entry(parent, struct kernel_info, rb_node);
+ if (pid < kerninfo->pid)
+ p = &(*p)->rb_left;
+ else if (pid > kerninfo->pid)
+ p = &(*p)->rb_right;
+ else
+ return kerninfo;
+ }
+
+ return NULL;
+}
+
+struct kernel_info *kerninfo__findnew(struct rb_root *kerninfo_root, pid_t pid)
+{
+ char path[PATH_MAX];
+ const char *root_dir;
+ int ret;
+ struct kernel_info *kerninfo = kerninfo__find(kerninfo_root, pid);
+
+ if (!kerninfo || kerninfo->pid != pid) {
+ if (pid == HOST_KERNEL_ID || pid == DEFAULT_GUEST_KERNEL_ID)
+ root_dir = "";
+ else {
+ if (!symbol_conf.guestmount)
+ goto out;
+ sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
+ ret = access(path, R_OK);
+ if (ret) {
+ pr_err("Can't access file %s\n", path);
+ goto out;
+ }
+ root_dir = path;
+ }
+ kerninfo = add_new_kernel_info(kerninfo_root, pid, root_dir);
+ }
+
+out:
+ return kerninfo;
+}
+
+void kerninfo__process_allkernels(struct rb_root *kerninfo_root,
+ process_kernel_info process,
+ void *data)
+{
+ struct rb_node *nd;
+
+ for (nd = rb_first(kerninfo_root); nd; nd = rb_next(nd)) {
+ struct kernel_info *pos = rb_entry(nd, struct kernel_info,
+ rb_node);
+ process(pos, data);
+ }
+}
+
+char *kern_mmap_name(struct kernel_info *kerninfo, char *buff)
+{
+ if (is_host_kernel(kerninfo))
+ sprintf(buff, "[%s]", "kernel.kallsyms");
+ else if (is_default_guest(kerninfo))
+ sprintf(buff, "[%s]", "guest.kernel.kallsyms");
+ else
+ sprintf(buff, "[%s.%d]", "guest.kernel.kallsyms", kerninfo->pid);
+
+ return buff;
+}