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>

1 files changed, 28 insertions, 49 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0fdf3ebef1e9..7d88ae5c270f 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -67,6 +67,17 @@ void perf_session__update_sample_type(struct perf_session *self)
         self->sample_type = perf_header__sample_type(&self->header);
 }
 
+int perf_session__create_kernel_maps(struct perf_session *self)
+{
+        int ret;
+        struct rb_root *root = &self->kerninfo_root;
+
+        ret = map_groups__create_kernel_maps(root, HOST_KERNEL_ID);
+        if (ret >= 0)
+                ret = map_groups__create_guest_kernel_maps(root);
+        return ret;
+}
+
 struct perf_session *perf_session__new(const char *filename, int mode, bool force)
 {
         size_t len = filename ? strlen(filename) + 1 : 0;
@@ -86,7 +97,7 @@ struct perf_session *perf_session__new(const char *filename, int mode, bool forc
         self->cwd = NULL;
         self->cwdlen = 0;
         self->unknown_events = 0;
-        map_groups__init(&self->kmaps);
+        self->kerninfo_root = RB_ROOT;
 
         if (mode == O_RDONLY) {
                 if (perf_session__open(self, force) < 0)
@@ -157,8 +168,9 @@ struct map_symbol *perf_session__resolve_callchain(struct perf_session *self,
                         continue;
                 }
 
+                al.filtered = false;
                 thread__find_addr_location(thread, self, cpumode,
-                                           MAP__FUNCTION, ip, &al, NULL);
+                                MAP__FUNCTION, thread->pid, ip, &al, NULL);
                 if (al.sym != NULL) {
                         if (sort__has_parent && !*parent &&
                             symbol__match_parent_regex(al.sym))
@@ -399,46 +411,6 @@ void perf_event_header__bswap(struct perf_event_header *self)
         self->size = bswap_16(self->size);
 }
 
-int perf_header__read_build_ids(struct perf_header *self,
-                                int input, u64 offset, u64 size)
-{
-        struct build_id_event bev;
-        char filename[PATH_MAX];
-        u64 limit = offset + size;
-        int err = -1;
-
-        while (offset < limit) {
-                struct dso *dso;
-                ssize_t len;
-                struct list_head *head = &dsos__user;
-
-                if (read(input, &bev, sizeof(bev)) != sizeof(bev))
-                        goto out;
-
-                if (self->needs_swap)
-                        perf_event_header__bswap(&bev.header);
-
-                len = bev.header.size - sizeof(bev);
-                if (read(input, filename, len) != len)
-                        goto out;
-
-                if (bev.header.misc & PERF_RECORD_MISC_KERNEL)
-                        head = &dsos__kernel;
-
-                dso = __dsos__findnew(head, filename);
-                if (dso != NULL) {
-                        dso__set_build_id(dso, &bev.build_id);
-                        if (head == &dsos__kernel && filename[0] == '[')
-                                dso->kernel = 1;
-                }
-
-                offset += bev.header.size;
-        }
-        err = 0;
-out:
-        return err;
-}
-
 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
 {
         struct thread *thread = perf_session__findnew(self, 0);
@@ -690,26 +662,33 @@ bool perf_session__has_traces(struct perf_session *self, const char *msg)
         return true;
 }
 
-int perf_session__set_kallsyms_ref_reloc_sym(struct perf_session *self,
+int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
                                              const char *symbol_name,
                                              u64 addr)
 {
         char *bracket;
         enum map_type i;
+        struct ref_reloc_sym *ref;
+
+        ref = zalloc(sizeof(struct ref_reloc_sym));
+        if (ref == NULL)
+                return -ENOMEM;
 
-        self->ref_reloc_sym.name = strdup(symbol_name);
-        if (self->ref_reloc_sym.name == NULL)
+        ref->name = strdup(symbol_name);
+        if (ref->name == NULL) {
+                free(ref);
                 return -ENOMEM;
+        }
 
-        bracket = strchr(self->ref_reloc_sym.name, ']');
+        bracket = strchr(ref->name, ']');
         if (bracket)
                 *bracket = '\0';
 
-        self->ref_reloc_sym.addr = addr;
+        ref->addr = addr;
 
         for (i = 0; i < MAP__NR_TYPES; ++i) {
-                struct kmap *kmap = map__kmap(self->vmlinux_maps[i]);
-                kmap->ref_reloc_sym = &self->ref_reloc_sym;
+                struct kmap *kmap = map__kmap(maps[i]);
+                kmap->ref_reloc_sym = ref;
         }
 
         return 0;