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Subject[tip:perf/core] perf machine: Introduce struct machines
Commit-ID:  876650e6c3209861a8949111140d805b3440951f
Gitweb: http://git.kernel.org/tip/876650e6c3209861a8949111140d805b3440951f
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Tue, 18 Dec 2012 19:15:48 -0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 24 Jan 2013 16:40:12 -0300

perf machine: Introduce struct machines

That consolidates the grouping of host + guests, isolating a bit more of
functionality now centered on 'perf_session' that can be used
independently in tools that don't need a 'perf_session' instance, but
needs to have all the thread/map/symbol machinery.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-c700rsiphpmzv8klogojpfut@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 4 +--
tools/perf/builtin-report.c | 2 +-
tools/perf/builtin-top.c | 4 +--
tools/perf/tests/hists_link.c | 17 +++++-------
tools/perf/util/header.c | 12 ++++----
tools/perf/util/machine.c | 64 ++++++++++++++++++++++++++++---------------
tools/perf/util/machine.h | 32 ++++++++++++++--------
tools/perf/util/session.c | 30 ++++++++------------
tools/perf/util/session.h | 11 ++------
9 files changed, 95 insertions(+), 81 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 69e2895..a0b2427 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -571,8 +571,8 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
"Check /proc/modules permission or run as root.\n");

if (perf_guest) {
- machines__process(&session->machines,
- perf_event__synthesize_guest_os, tool);
+ machines__process_guests(&session->machines,
+ perf_event__synthesize_guest_os, tool);
}

if (!opts->target.system_wide)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 5134acf..13cdf61 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -372,7 +372,7 @@ static int __cmd_report(struct perf_report *rep)
if (ret)
goto out_delete;

- kernel_map = session->host_machine.vmlinux_maps[MAP__FUNCTION];
+ kernel_map = session->machines.host.vmlinux_maps[MAP__FUNCTION];
kernel_kmap = map__kmap(kernel_map);
if (kernel_map == NULL ||
(kernel_map->dso->hit &&
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 996b10c..e0ecebd 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -966,10 +966,10 @@ static int __cmd_top(struct perf_top *top)
if (perf_target__has_task(&opts->target))
perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
perf_event__process,
- &top->session->host_machine);
+ &top->session->machines.host);
else
perf_event__synthesize_threads(&top->tool, perf_event__process,
- &top->session->host_machine);
+ &top->session->machines.host);
perf_top__start_counters(top);
top->session->evlist = top->evlist;
perf_session__set_id_hdr_size(top->session);
diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
index 0f1aae3..27860a0 100644
--- a/tools/perf/tests/hists_link.c
+++ b/tools/perf/tests/hists_link.c
@@ -75,13 +75,11 @@ static struct {
{ "[kernel]", kernel_syms, ARRAY_SIZE(kernel_syms) },
};

-static struct machine *setup_fake_machine(void)
+static struct machine *setup_fake_machine(struct machines *machines)
{
- struct rb_root machine_root = RB_ROOT;
- struct machine *machine;
+ struct machine *machine = machines__find(machines, HOST_KERNEL_ID);
size_t i;

- machine = machines__findnew(&machine_root, HOST_KERNEL_ID);
if (machine == NULL) {
pr_debug("Not enough memory for machine setup\n");
return NULL;
@@ -435,6 +433,7 @@ static void print_hists(struct hists *hists)
int test__hists_link(void)
{
int err = -1;
+ struct machines machines;
struct machine *machine = NULL;
struct perf_evsel *evsel, *first;
struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
@@ -452,8 +451,10 @@ int test__hists_link(void)
/* default sort order (comm,dso,sym) will be used */
setup_sorting(NULL, NULL);

+ machines__init(&machines);
+
/* setup threads/dso/map/symbols also */
- machine = setup_fake_machine();
+ machine = setup_fake_machine(&machines);
if (!machine)
goto out;

@@ -492,11 +493,7 @@ int test__hists_link(void)
out:
/* tear down everything */
perf_evlist__delete(evlist);
-
- if (machine) {
- machine__delete_threads(machine);
- machine__delete(machine);
- }
+ machines__exit(&machines);

return err;
}
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index bb578d2..fccd69d 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -287,12 +287,12 @@ static int dsos__write_buildid_table(struct perf_header *header, int fd)
struct perf_session *session = container_of(header,
struct perf_session, header);
struct rb_node *nd;
- int err = machine__write_buildid_table(&session->host_machine, fd);
+ int err = machine__write_buildid_table(&session->machines.host, fd);

if (err)
return err;

- for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
+ for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
err = machine__write_buildid_table(pos, fd);
if (err)
@@ -448,9 +448,9 @@ static int perf_session__cache_build_ids(struct perf_session *session)
if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
return -1;

- ret = machine__cache_build_ids(&session->host_machine, debugdir);
+ ret = machine__cache_build_ids(&session->machines.host, debugdir);

- for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
+ for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
ret |= machine__cache_build_ids(pos, debugdir);
}
@@ -467,9 +467,9 @@ static bool machine__read_build_ids(struct machine *machine, bool with_hits)
static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
{
struct rb_node *nd;
- bool ret = machine__read_build_ids(&session->host_machine, with_hits);
+ bool ret = machine__read_build_ids(&session->machines.host, with_hits);

- for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
+ for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
ret |= machine__read_build_ids(pos, with_hits);
}
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 71fa903..efdb38e 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -91,10 +91,22 @@ void machine__delete(struct machine *machine)
free(machine);
}

-struct machine *machines__add(struct rb_root *machines, pid_t pid,
+void machines__init(struct machines *machines)
+{
+ machine__init(&machines->host, "", HOST_KERNEL_ID);
+ machines->guests = RB_ROOT;
+}
+
+void machines__exit(struct machines *machines)
+{
+ machine__exit(&machines->host);
+ /* XXX exit guest */
+}
+
+struct machine *machines__add(struct machines *machines, pid_t pid,
const char *root_dir)
{
- struct rb_node **p = &machines->rb_node;
+ struct rb_node **p = &machines->guests.rb_node;
struct rb_node *parent = NULL;
struct machine *pos, *machine = malloc(sizeof(*machine));

@@ -116,18 +128,21 @@ struct machine *machines__add(struct rb_root *machines, pid_t pid,
}

rb_link_node(&machine->rb_node, parent, p);
- rb_insert_color(&machine->rb_node, machines);
+ rb_insert_color(&machine->rb_node, &machines->guests);

return machine;
}

-struct machine *machines__find(struct rb_root *machines, pid_t pid)
+struct machine *machines__find(struct machines *machines, pid_t pid)
{
- struct rb_node **p = &machines->rb_node;
+ struct rb_node **p = &machines->guests.rb_node;
struct rb_node *parent = NULL;
struct machine *machine;
struct machine *default_machine = NULL;

+ if (pid == HOST_KERNEL_ID)
+ return &machines->host;
+
while (*p != NULL) {
parent = *p;
machine = rb_entry(parent, struct machine, rb_node);
@@ -144,7 +159,7 @@ struct machine *machines__find(struct rb_root *machines, pid_t pid)
return default_machine;
}

-struct machine *machines__findnew(struct rb_root *machines, pid_t pid)
+struct machine *machines__findnew(struct machines *machines, pid_t pid)
{
char path[PATH_MAX];
const char *root_dir = "";
@@ -178,12 +193,12 @@ out:
return machine;
}

-void machines__process(struct rb_root *machines,
- machine__process_t process, void *data)
+void machines__process_guests(struct machines *machines,
+ machine__process_t process, void *data)
{
struct rb_node *nd;

- for (nd = rb_first(machines); nd; nd = rb_next(nd)) {
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
process(pos, data);
}
@@ -203,12 +218,14 @@ char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
return bf;
}

-void machines__set_id_hdr_size(struct rb_root *machines, u16 id_hdr_size)
+void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
{
struct rb_node *node;
struct machine *machine;

- for (node = rb_first(machines); node; node = rb_next(node)) {
+ machines->host.id_hdr_size = id_hdr_size;
+
+ for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
machine = rb_entry(node, struct machine, rb_node);
machine->id_hdr_size = id_hdr_size;
}
@@ -313,12 +330,13 @@ struct map *machine__new_module(struct machine *machine, u64 start,
return map;
}

-size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp)
+size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
{
struct rb_node *nd;
- size_t ret = 0;
+ size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) +
+ __dsos__fprintf(&machines->host.user_dsos, fp);

- for (nd = rb_first(machines); nd; nd = rb_next(nd)) {
+ 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, fp);
ret += __dsos__fprintf(&pos->user_dsos, fp);
@@ -334,13 +352,13 @@ size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
__dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm);
}

-size_t machines__fprintf_dsos_buildid(struct rb_root *machines, FILE *fp,
+size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
bool (skip)(struct dso *dso, int parm), int parm)
{
struct rb_node *nd;
- size_t ret = 0;
+ size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);

- for (nd = rb_first(machines); nd; nd = rb_next(nd)) {
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
struct machine *pos = rb_entry(nd, struct machine, rb_node);
ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
}
@@ -511,7 +529,7 @@ void machine__destroy_kernel_maps(struct machine *machine)
}
}

-int machines__create_guest_kernel_maps(struct rb_root *machines)
+int machines__create_guest_kernel_maps(struct machines *machines)
{
int ret = 0;
struct dirent **namelist = NULL;
@@ -560,20 +578,22 @@ failure:
return ret;
}

-void machines__destroy_guest_kernel_maps(struct rb_root *machines)
+void machines__destroy_kernel_maps(struct machines *machines)
{
- struct rb_node *next = rb_first(machines);
+ struct rb_node *next = rb_first(&machines->guests);
+
+ machine__destroy_kernel_maps(&machines->host);

while (next) {
struct machine *pos = rb_entry(next, struct machine, rb_node);

next = rb_next(&pos->rb_node);
- rb_erase(&pos->rb_node, machines);
+ rb_erase(&pos->rb_node, &machines->guests);
machine__delete(pos);
}
}

-int machines__create_kernel_maps(struct rb_root *machines, pid_t pid)
+int machines__create_kernel_maps(struct machines *machines, pid_t pid)
{
struct machine *machine = machines__findnew(machines, pid);

diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index e112368..5ac5892 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -47,16 +47,24 @@ int machine__process_event(struct machine *machine, union perf_event *event);

typedef void (*machine__process_t)(struct machine *machine, void *data);

-void machines__process(struct rb_root *machines,
- machine__process_t process, void *data);
+struct machines {
+ struct machine host;
+ struct rb_root guests;
+};
+
+void machines__init(struct machines *machines);
+void machines__exit(struct machines *machines);
+
+void machines__process_guests(struct machines *machines,
+ machine__process_t process, void *data);

-struct machine *machines__add(struct rb_root *machines, pid_t pid,
+struct machine *machines__add(struct machines *machines, pid_t pid,
const char *root_dir);
-struct machine *machines__find_host(struct rb_root *machines);
-struct machine *machines__find(struct rb_root *machines, pid_t pid);
-struct machine *machines__findnew(struct rb_root *machines, pid_t pid);
+struct machine *machines__find_host(struct machines *machines);
+struct machine *machines__find(struct machines *machines, pid_t pid);
+struct machine *machines__findnew(struct machines *machines, pid_t pid);

-void machines__set_id_hdr_size(struct rb_root *machines, u16 id_hdr_size);
+void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size);
char *machine__mmap_name(struct machine *machine, char *bf, size_t size);

int machine__init(struct machine *machine, const char *root_dir, pid_t pid);
@@ -132,17 +140,17 @@ int machine__load_vmlinux_path(struct machine *machine, enum map_type type,

size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
bool (skip)(struct dso *dso, int parm), int parm);
-size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp);
-size_t machines__fprintf_dsos_buildid(struct rb_root *machines, FILE *fp,
+size_t machines__fprintf_dsos(struct machines *machines, FILE *fp);
+size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
bool (skip)(struct dso *dso, int parm), int parm);

void machine__destroy_kernel_maps(struct machine *machine);
int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel);
int machine__create_kernel_maps(struct machine *machine);

-int machines__create_kernel_maps(struct rb_root *machines, pid_t pid);
-int machines__create_guest_kernel_maps(struct rb_root *machines);
-void machines__destroy_guest_kernel_maps(struct rb_root *machines);
+int machines__create_kernel_maps(struct machines *machines, pid_t pid);
+int machines__create_guest_kernel_maps(struct machines *machines);
+void machines__destroy_kernel_maps(struct machines *machines);

size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index b0bcc32..046b057 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -86,13 +86,12 @@ void perf_session__set_id_hdr_size(struct perf_session *session)
{
u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);

- session->host_machine.id_hdr_size = id_hdr_size;
machines__set_id_hdr_size(&session->machines, id_hdr_size);
}

int perf_session__create_kernel_maps(struct perf_session *self)
{
- int ret = machine__create_kernel_maps(&self->host_machine);
+ int ret = machine__create_kernel_maps(&self->machines.host);

if (ret >= 0)
ret = machines__create_guest_kernel_maps(&self->machines);
@@ -101,8 +100,7 @@ int perf_session__create_kernel_maps(struct perf_session *self)

static void perf_session__destroy_kernel_maps(struct perf_session *self)
{
- machine__destroy_kernel_maps(&self->host_machine);
- machines__destroy_guest_kernel_maps(&self->machines);
+ machines__destroy_kernel_maps(&self->machines);
}

struct perf_session *perf_session__new(const char *filename, int mode,
@@ -127,12 +125,11 @@ struct perf_session *perf_session__new(const char *filename, int mode,
goto out;

memcpy(self->filename, filename, len);
- self->machines = RB_ROOT;
self->repipe = repipe;
INIT_LIST_HEAD(&self->ordered_samples.samples);
INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
INIT_LIST_HEAD(&self->ordered_samples.to_free);
- machine__init(&self->host_machine, "", HOST_KERNEL_ID);
+ machines__init(&self->machines);

if (mode == O_RDONLY) {
if (perf_session__open(self, force) < 0)
@@ -162,12 +159,12 @@ out_delete:

static void perf_session__delete_dead_threads(struct perf_session *session)
{
- machine__delete_dead_threads(&session->host_machine);
+ machine__delete_dead_threads(&session->machines.host);
}

static void perf_session__delete_threads(struct perf_session *session)
{
- machine__delete_threads(&session->host_machine);
+ machine__delete_threads(&session->machines.host);
}

static void perf_session_env__delete(struct perf_session_env *env)
@@ -192,7 +189,7 @@ void perf_session__delete(struct perf_session *self)
perf_session__delete_dead_threads(self);
perf_session__delete_threads(self);
perf_session_env__delete(&self->header.env);
- machine__exit(&self->host_machine);
+ machines__exit(&self->machines);
close(self->fd);
free(self);
vdso__exit();
@@ -998,7 +995,7 @@ void perf_event_header__bswap(struct perf_event_header *self)

struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
{
- return machine__findnew_thread(&session->host_machine, pid);
+ return machine__findnew_thread(&session->machines.host, pid);
}

static struct thread *perf_session__register_idle_thread(struct perf_session *self)
@@ -1335,16 +1332,13 @@ int maps__set_kallsyms_ref_reloc_sym(struct map **maps,

size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
{
- return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
- __dsos__fprintf(&self->host_machine.user_dsos, fp) +
- machines__fprintf_dsos(&self->machines, fp);
+ return machines__fprintf_dsos(&self->machines, fp);
}

size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
bool (skip)(struct dso *dso, int parm), int parm)
{
- size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, skip, parm);
- return ret + machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm);
+ return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm);
}

size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
@@ -1368,7 +1362,7 @@ size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
* FIXME: Here we have to actually print all the machines in this
* session, not just the host...
*/
- return machine__fprintf(&session->host_machine, fp);
+ return machine__fprintf(&session->machines.host, fp);
}

void perf_session__remove_thread(struct perf_session *session,
@@ -1377,10 +1371,10 @@ void perf_session__remove_thread(struct perf_session *session,
/*
* FIXME: This one makes no sense, we need to remove the thread from
* the machine it belongs to, perf_session can have many machines, so
- * doing it always on ->host_machine is wrong. Fix when auditing all
+ * doing it always on ->machines.host is wrong. Fix when auditing all
* the 'perf kvm' code.
*/
- machine__remove_thread(&session->host_machine, th);
+ machine__remove_thread(&session->machines.host, th);
}

struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 57066cb..de4e687 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -30,8 +30,7 @@ struct ordered_samples {
struct perf_session {
struct perf_header header;
unsigned long size;
- struct machine host_machine;
- struct rb_root machines;
+ struct machines machines;
struct perf_evlist *evlist;
struct pevent *pevent;
struct events_stats stats;
@@ -49,7 +48,7 @@ struct perf_tool;
struct perf_session *perf_session__new(const char *filename, int mode,
bool force, bool repipe,
struct perf_tool *tool);
-void perf_session__delete(struct perf_session *self);
+void perf_session__delete(struct perf_session *session);

void perf_event_header__bswap(struct perf_event_header *self);

@@ -78,22 +77,18 @@ void perf_session__remove_thread(struct perf_session *self, struct thread *th);
static inline
struct machine *perf_session__find_host_machine(struct perf_session *self)
{
- return &self->host_machine;
+ return &self->machines.host;
}

static inline
struct machine *perf_session__find_machine(struct perf_session *self, pid_t pid)
{
- if (pid == HOST_KERNEL_ID)
- return &self->host_machine;
return machines__find(&self->machines, pid);
}

static inline
struct machine *perf_session__findnew_machine(struct perf_session *self, pid_t pid)
{
- if (pid == HOST_KERNEL_ID)
- return &self->host_machine;
return machines__findnew(&self->machines, pid);
}


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