[PATCH][RESEND] Export per-tid and per-tgid cputime in nanoseconds.
in [Kernel]
|
Prev: [PATCH] Export per-tid and per-tgid cputime in nanoseconds.
Next: Security: Add __init to register_security to disable load a security module on runtime
From: Divyesh Shah on 26 Feb 2010 21:10 This can be used by applications to get finer granularity cputime usage on platforms that use timestamp counters or HPET. Signed-off-by: Divyesh Shah<dpshah(a)google.com> --- fs/proc/array.c | 40 ++++++++++++++++++++++++++++++++++++++++ fs/proc/base.c | 2 ++ fs/proc/internal.h | 2 ++ 3 files changed, 44 insertions(+), 0 deletions(-) diff --git a/fs/proc/array.c b/fs/proc/array.c index 13b5d07..54604b8 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -547,3 +547,43 @@ int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, return 0; } + +static int do_task_cputime(struct task_struct *task, char * buffer, int whole) +{ + int res; + unsigned long flags; + unsigned long long sum_exec_runtime = 0; + struct task_struct *t; + + if (lock_task_sighand(task, &flags)) { + if (whole) { + t = task; + /* + * Add up live thread sum_exec_runtime at the group + * level. + */ + do { + sum_exec_runtime += t->se.sum_exec_runtime; + t = next_thread(t); + } while (t != task); + sum_exec_runtime += task->signal->sum_sched_runtime; + } + unlock_task_sighand(task, &flags); + } + + if (!whole) + sum_exec_runtime = task->se.sum_exec_runtime; + + res = sprintf(buffer,"%llu\n", sum_exec_runtime); + return res; +} + +int proc_tid_cputime(struct task_struct *task, char * buffer) +{ + return do_task_cputime(task, buffer, 0); +} + +int proc_tgid_cputime(struct task_struct *task, char * buffer) +{ + return do_task_cputime(task, buffer, 1); +} diff --git a/fs/proc/base.c b/fs/proc/base.c index 58324c2..8fbc785 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2595,6 +2595,7 @@ static const struct pid_entry tgid_base_stuff[] = { REG("numa_maps", S_IRUGO, proc_numa_maps_operations), #endif REG("mem", S_IRUSR|S_IWUSR, proc_mem_operations), + INF("cputime_ns", S_IRUGO, proc_tgid_cputime), LNK("cwd", proc_cwd_link), LNK("root", proc_root_link), LNK("exe", proc_exe_link), @@ -2930,6 +2931,7 @@ static const struct pid_entry tid_base_stuff[] = { REG("numa_maps", S_IRUGO, proc_numa_maps_operations), #endif REG("mem", S_IRUSR|S_IWUSR, proc_mem_operations), + INF("cputime_ns", S_IRUGO, proc_tid_cputime), LNK("cwd", proc_cwd_link), LNK("root", proc_root_link), LNK("exe", proc_exe_link), diff --git a/fs/proc/internal.h b/fs/proc/internal.h index 1f24a3e..f9e9799 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -51,6 +51,8 @@ extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task); extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task); +extern int proc_tid_cputime(struct task_struct *, char *); +extern int proc_tgid_cputime(struct task_struct *, char *); extern loff_t mem_lseek(struct file *file, loff_t offset, int orig); extern const struct file_operations proc_maps_operations; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |