[PATCH 10/14] perf machine: No need to have two DSOs lists

From: Arnaldo Carvalho de Melo
Date: Fri May 29 2015 - 12:31:21 EST

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From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

We can, given a DSO, figure out if it is a kernel, a kernel module or
a userlevel DSO, so stop having to process two lists in several
functions.

If searching becomes an issue at some point, we can have them in a
rbtree, etc.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-s4yb0onpdywu6dj2xl9lxi4t@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/tests/hists_common.c | 2 +-
tools/perf/util/build-id.c | 59 +++++++++++------------------------------
tools/perf/util/dso.c | 2 +-
tools/perf/util/header.c | 6 +----
tools/perf/util/machine.c | 28 ++++++++-----------
tools/perf/util/machine.h | 3 +--
tools/perf/util/map.c | 2 +-
tools/perf/util/probe-event.c | 5 ++--
tools/perf/util/symbol-elf.c | 6 +----
tools/perf/util/vdso.c | 6 ++---
10 files changed, 39 insertions(+), 80 deletions(-)

diff --git a/tools/perf/tests/hists_common.c b/tools/perf/tests/hists_common.c
index 456f884eb27b..bcde1d27919c 100644
--- a/tools/perf/tests/hists_common.c
+++ b/tools/perf/tests/hists_common.c
@@ -121,7 +121,7 @@ struct machine *setup_fake_machine(struct machines *machines)
size_t k;
struct dso *dso;

- dso = __dsos__findnew(&machine->user_dsos,
+ dso = __dsos__findnew(&machine->dsos,
fake_symbols[i].dso_name);
if (dso == NULL)
goto out;
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index ad8cfcbaa25d..1f6fc2323ef9 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -162,15 +162,20 @@ static int write_buildid(const char *name, size_t name_len, u8 *build_id,
return write_padded(fd, name, name_len + 1, len);
}

-static int __dsos__write_buildid_table(struct list_head *head,
- struct machine *machine,
- pid_t pid, u16 misc, int fd)
+static int machine__write_buildid_table(struct machine *machine, int fd)
{
+ int err = 0;
char nm[PATH_MAX];
struct dso *pos;
+ u16 kmisc = PERF_RECORD_MISC_KERNEL,
+ umisc = PERF_RECORD_MISC_USER;
+
+ if (!machine__is_host(machine)) {
+ kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
+ umisc = PERF_RECORD_MISC_GUEST_USER;
+ }

- dsos__for_each_with_build_id(pos, head) {
- int err;
+ dsos__for_each_with_build_id(pos, &machine->dsos.head) {
const char *name;
size_t name_len;

@@ -189,32 +194,12 @@ static int __dsos__write_buildid_table(struct list_head *head,
name_len = pos->long_name_len + 1;
}

- err = write_buildid(name, name_len, pos->build_id,
- pid, misc, fd);
+ err = write_buildid(name, name_len, pos->build_id, machine->pid,
+ pos->kernel ? kmisc : umisc, fd);
if (err)
- return err;
- }
-
- return 0;
-}
-
-static int machine__write_buildid_table(struct machine *machine, int fd)
-{
- int err;
- u16 kmisc = PERF_RECORD_MISC_KERNEL,
- umisc = PERF_RECORD_MISC_USER;
-
- if (!machine__is_host(machine)) {
- kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
- umisc = PERF_RECORD_MISC_GUEST_USER;
+ break;
}

- err = __dsos__write_buildid_table(&machine->kernel_dsos.head, machine,
- machine->pid, kmisc, fd);
- if (err == 0)
- err = __dsos__write_buildid_table(&machine->user_dsos.head,
- machine, machine->pid, umisc,
- fd);
return err;
}

@@ -247,13 +232,7 @@ static int __dsos__hit_all(struct list_head *head)

static int machine__hit_all_dsos(struct machine *machine)
{
- int err;
-
- err = __dsos__hit_all(&machine->kernel_dsos.head);
- if (err)
- return err;
-
- return __dsos__hit_all(&machine->user_dsos.head);
+ return __dsos__hit_all(&machine->dsos.head);
}

int dsos__hit_all(struct perf_session *session)
@@ -493,9 +472,7 @@ static int __dsos__cache_build_ids(struct list_head *head,

static int machine__cache_build_ids(struct machine *machine)
{
- int ret = __dsos__cache_build_ids(&machine->kernel_dsos.head, machine);
- ret |= __dsos__cache_build_ids(&machine->user_dsos.head, machine);
- return ret;
+ return __dsos__cache_build_ids(&machine->dsos.head, machine);
}

int perf_session__cache_build_ids(struct perf_session *session)
@@ -520,11 +497,7 @@ int perf_session__cache_build_ids(struct perf_session *session)

static bool machine__read_build_ids(struct machine *machine, bool with_hits)
{
- bool ret;
-
- ret = __dsos__read_build_ids(&machine->kernel_dsos.head, with_hits);
- ret |= __dsos__read_build_ids(&machine->user_dsos.head, with_hits);
- return ret;
+ return __dsos__read_build_ids(&machine->dsos.head, with_hits);
}

bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index fe5236833164..ff040b0569d6 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -833,7 +833,7 @@ struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
/*
* The kernel dso could be created by build_id processing.
*/
- struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name);
+ struct dso *dso = __dsos__findnew(&machine->dsos, name);

/*
* We need to run this in all cases, since during the build_id
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 3f0d809d853a..a900e9441fb5 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1238,7 +1238,6 @@ static int __event_process_build_id(struct build_id_event *bev,
struct perf_session *session)
{
int err = -1;
- struct dsos *dsos;
struct machine *machine;
u16 misc;
struct dso *dso;
@@ -1253,22 +1252,19 @@ static int __event_process_build_id(struct build_id_event *bev,
switch (misc) {
case PERF_RECORD_MISC_KERNEL:
dso_type = DSO_TYPE_KERNEL;
- dsos = &machine->kernel_dsos;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
dso_type = DSO_TYPE_GUEST_KERNEL;
- dsos = &machine->kernel_dsos;
break;
case PERF_RECORD_MISC_USER:
case PERF_RECORD_MISC_GUEST_USER:
dso_type = DSO_TYPE_USER;
- dsos = &machine->user_dsos;
break;
default:
goto out;
}

- dso = __dsos__findnew(dsos, filename);
+ dso = __dsos__findnew(&machine->dsos, filename);
if (dso != NULL) {
char sbuild_id[BUILD_ID_SIZE * 2 + 1];

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 8934dc4345fe..ffd31079d447 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -26,8 +26,7 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
{
map_groups__init(&machine->kmaps, machine);
RB_CLEAR_NODE(&machine->rb_node);
- dsos__init(&machine->user_dsos);
- dsos__init(&machine->kernel_dsos);
+ dsos__init(&machine->dsos);

machine->threads = RB_ROOT;
pthread_rwlock_init(&machine->threads_lock, NULL);
@@ -111,8 +110,7 @@ void machine__delete_threads(struct machine *machine)
void machine__exit(struct machine *machine)
{
map_groups__exit(&machine->kmaps);
- dsos__delete(&machine->user_dsos);
- dsos__delete(&machine->kernel_dsos);
+ dsos__delete(&machine->dsos);
vdso__exit(machine);
zfree(&machine->root_dir);
zfree(&machine->current_tid);
@@ -490,9 +488,9 @@ machine__module_dso(struct machine *machine, struct kmod_path *m,
{
struct dso *dso;

- dso = dsos__find(&machine->kernel_dsos, m->name, true);
+ dso = dsos__find(&machine->dsos, m->name, true);
if (!dso) {
- dso = dsos__addnew(&machine->kernel_dsos, m->name);
+ dso = dsos__addnew(&machine->dsos, m->name);
if (dso == NULL)
return NULL;

@@ -561,13 +559,11 @@ out:
size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
{
struct rb_node *nd;
- size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) +
- __dsos__fprintf(&machines->host.user_dsos.head, fp);
+ size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);

for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
- ret += __dsos__fprintf(&pos->kernel_dsos.head, fp);
- ret += __dsos__fprintf(&pos->user_dsos.head, fp);
+ ret += __dsos__fprintf(&pos->dsos.head, fp);
}

return ret;
@@ -576,8 +572,7 @@ size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
bool (skip)(struct dso *dso, int parm), int parm)
{
- return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) +
- __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm);
+ return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
}

size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
@@ -1106,7 +1101,7 @@ static bool machine__uses_kcore(struct machine *machine)
{
struct dso *dso;

- list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
+ list_for_each_entry(dso, &machine->dsos.head, node) {
if (dso__is_kcore(dso))
return true;
}
@@ -1153,8 +1148,8 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
struct dso *kernel = NULL;
struct dso *dso;

- list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
- if (is_kernel_module(dso->long_name))
+ list_for_each_entry(dso, &machine->dsos.head, node) {
+ if (dso->kernel && is_kernel_module(dso->long_name))
continue;

kernel = dso;
@@ -1162,8 +1157,7 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
}

if (kernel == NULL)
- kernel = __dsos__findnew(&machine->kernel_dsos,
- kmmap_prefix);
+ kernel = __dsos__findnew(&machine->dsos, kmmap_prefix);
if (kernel == NULL)
goto out_problem;

diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index c7963c63c474..aabca583e655 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -34,8 +34,7 @@ struct machine {
struct list_head dead_threads;
struct thread *last_match;
struct vdso_info *vdso_info;
- struct dsos user_dsos;
- struct dsos kernel_dsos;
+ struct dsos dsos;
struct map_groups kmaps;
struct map *vmlinux_maps[MAP__NR_TYPES];
u64 kernel_start;
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index af572322586d..57ff0256c22c 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -180,7 +180,7 @@ struct map *map__new(struct machine *machine, u64 start, u64 len,
pgoff = 0;
dso = vdso__dso_findnew(machine, thread);
} else
- dso = __dsos__findnew(&machine->user_dsos, filename);
+ dso = __dsos__findnew(&machine->dsos, filename);

if (dso == NULL)
goto out_delete;
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index e6a02b1ffd6d..d27edef5eb5b 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -256,8 +256,9 @@ static int kernel_get_module_dso(const char *module, struct dso **pdso)
int ret = 0;

if (module) {
- list_for_each_entry(dso, &host_machine->kernel_dsos.head,
- node) {
+ list_for_each_entry(dso, &host_machine->dsos.head, node) {
+ if (!dso->kernel)
+ continue;
if (strncmp(dso->short_name + 1, module,
dso->short_name_len - 2) == 0)
goto found;
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index fa10116a12ab..a93ba85509b2 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1031,11 +1031,7 @@ int dso__load_sym(struct dso *dso, struct map *map,
}
curr_dso->symtab_type = dso->symtab_type;
map_groups__insert(kmaps, curr_map);
- /*
- * The new DSO should go to the kernel DSOS
- */
- dsos__add(&map->groups->machine->kernel_dsos,
- curr_dso);
+ dsos__add(&map->groups->machine->dsos, curr_dso);
dso__set_loaded(curr_dso, map->type);
} else
curr_dso = curr_map->dso;
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index 5c7dd796979d..d3651b43e945 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -127,7 +127,7 @@ static struct dso *vdso__new(struct machine *machine, const char *short_name,

dso = dso__new(short_name);
if (dso != NULL) {
- dsos__add(&machine->user_dsos, dso);
+ dsos__add(&machine->dsos, dso);
dso__set_long_name(dso, long_name, false);
}

@@ -236,7 +236,7 @@ static struct dso *vdso__findnew_compat(struct machine *machine,
const char *file_name;
struct dso *dso;

- dso = dsos__find(&machine->user_dsos, vdso_file->dso_name, true);
+ dso = dsos__find(&machine->dsos, vdso_file->dso_name, true);
if (dso)
return dso;

@@ -299,7 +299,7 @@ struct dso *vdso__dso_findnew(struct machine *machine,
return dso;
#endif

- dso = dsos__find(&machine->user_dsos, DSO__NAME_VDSO, true);
+ dso = dsos__find(&machine->dsos, DSO__NAME_VDSO, true);
if (!dso) {
char *file;

--
2.1.0

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Next message: Christoph Hellwig: "Re: [PATCH] zpool: add EXPORT_SYMBOL for functions"
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In reply to: Arnaldo Carvalho de Melo: "[PATCH 03/14] perf db-export: Fix thread ref-counting"
Next in thread: Arnaldo Carvalho de Melo: "[PATCH 01/14] perf annotate: Fix -i option, which is currently ignored."
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