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perf tools: Share map_groups among threads of the same group

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Sharing map groups within all process threads. This way
there's only one copy of mmap info and it's reachable
from any thread within the process.

Original-patch-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1397490723-1992-5-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
Jiri Olsa 2014-04-09 20:54:29 +02:00
parent a26ca6716a
commit cddcef6077
3 changed files with 47 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
tools/perf/util/machine.c
View File

@ -316,6 +316,17 @@ static struct thread *__machine__findnew_thread(struct machine *machine,
rb_link_node(&th->rb_node, parent, p);
rb_insert_color(&th->rb_node, &machine->threads);
machine->last_match = th;
/*
* We have to initialize map_groups separately
* after rb tree is updated.
*
* The reason is that we call machine__findnew_thread
* within thread__init_map_groups to find the thread
* leader and that would screwed the rb tree.
*/
if (thread__init_map_groups(th, machine))
return NULL;
}
return th;

48
tools/perf/util/thread.c
View File

@ -8,6 +8,22 @@
#include "debug.h"
#include "comm.h"
int thread__init_map_groups(struct thread *thread, struct machine *machine)
{
struct thread *leader;
pid_t pid = thread->pid_;
if (pid == thread->tid) {
thread->mg = map_groups__new();
} else {
leader = machine__findnew_thread(machine, pid, pid);
if (leader)
thread->mg = map_groups__get(leader->mg);
}
return thread->mg ? 0 : -1;
}
struct thread *thread__new(pid_t pid, pid_t tid)
{
char *comm_str;
@ -15,10 +31,6 @@ struct thread *thread__new(pid_t pid, pid_t tid)
struct thread *thread = zalloc(sizeof(*thread));
if (thread != NULL) {
thread->mg = map_groups__new();
if (thread->mg == NULL)
goto out_free;
thread->pid_ = pid;
thread->tid = tid;
thread->ppid = -1;
@ -40,8 +52,6 @@ struct thread *thread__new(pid_t pid, pid_t tid)
return thread;
err_thread:
map_groups__delete(thread->mg);
out_free:
free(thread);
return NULL;
}
@ -126,9 +136,26 @@ void thread__insert_map(struct thread *thread, struct map *map)
map_groups__insert(thread->mg, map);
}
static int thread__clone_map_groups(struct thread *thread,
struct thread *parent)
{
int i;
/* This is new thread, we share map groups for process. */
if (thread->pid_ == parent->pid_)
return 0;
/* But this one is new process, copy maps. */
for (i = 0; i < MAP__NR_TYPES; ++i)
if (map_groups__clone(thread->mg, parent->mg, i) < 0)
return -ENOMEM;
return 0;
}
int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
{
int i, err;
int err;
if (parent->comm_set) {
const char *comm = thread__comm_str(parent);
@ -140,13 +167,8 @@ int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
thread->comm_set = true;
}
for (i = 0; i < MAP__NR_TYPES; ++i)
if (map_groups__clone(thread->mg, parent->mg, i) < 0)
return -ENOMEM;
thread->ppid = parent->tid;
return 0;
return thread__clone_map_groups(thread, parent);
}
void thread__find_cpumode_addr_location(struct thread *thread,

1
tools/perf/util/thread.h
View File

@ -30,6 +30,7 @@ struct machine;
struct comm;
struct thread *thread__new(pid_t pid, pid_t tid);
int thread__init_map_groups(struct thread *thread, struct machine *machine);
void thread__delete(struct thread *thread);
static inline void thread__exited(struct thread *thread)
{