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author | Ingo Molnar <mingo@elte.hu> | 2007-07-09 18:52:00 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2007-07-09 18:52:00 +0200 |
commit | 43ae34cb4cd650d1eb4460a8253a8e747ba052ac (patch) | |
tree | 51f1b6a8331dea95d8d560c2c27f4abdad1d759c /fs/proc | |
parent | sched: add CFS debug sysctls (diff) | |
download | linux-43ae34cb4cd650d1eb4460a8253a8e747ba052ac.tar.xz linux-43ae34cb4cd650d1eb4460a8253a8e747ba052ac.zip |
sched: scheduler debugging, core
scheduler debugging core: implement /proc/sched_debug and
/proc/<PID>/sched files for scheduler debugging.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/proc')
-rw-r--r-- | fs/proc/base.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 0f40e820c7fd..46ea5d56e1bb 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -929,6 +929,69 @@ static const struct file_operations proc_fault_inject_operations = { }; #endif +#ifdef CONFIG_SCHED_DEBUG +/* + * Print out various scheduling related per-task fields: + */ +static int sched_show(struct seq_file *m, void *v) +{ + struct inode *inode = m->private; + struct task_struct *p; + + WARN_ON(!inode); + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + proc_sched_show_task(p, m); + + put_task_struct(p); + + return 0; +} + +static ssize_t +sched_write(struct file *file, const char __user *buf, + size_t count, loff_t *offset) +{ + struct inode *inode = file->f_path.dentry->d_inode; + struct task_struct *p; + + WARN_ON(!inode); + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + proc_sched_set_task(p); + + put_task_struct(p); + + return count; +} + +static int sched_open(struct inode *inode, struct file *filp) +{ + int ret; + + ret = single_open(filp, sched_show, NULL); + if (!ret) { + struct seq_file *m = filp->private_data; + + m->private = inode; + } + return ret; +} + +static const struct file_operations proc_pid_sched_operations = { + .open = sched_open, + .read = seq_read, + .write = sched_write, + .llseek = seq_lseek, + .release = seq_release, +}; + +#endif + static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd) { struct inode *inode = dentry->d_inode; @@ -1963,6 +2026,9 @@ static const struct pid_entry tgid_base_stuff[] = { INF("environ", S_IRUSR, pid_environ), INF("auxv", S_IRUSR, pid_auxv), INF("status", S_IRUGO, pid_status), +#ifdef CONFIG_SCHED_DEBUG + REG("sched", S_IRUGO|S_IWUSR, pid_sched), +#endif INF("cmdline", S_IRUGO, pid_cmdline), INF("stat", S_IRUGO, tgid_stat), INF("statm", S_IRUGO, pid_statm), @@ -2247,6 +2313,9 @@ static const struct pid_entry tid_base_stuff[] = { INF("environ", S_IRUSR, pid_environ), INF("auxv", S_IRUSR, pid_auxv), INF("status", S_IRUGO, pid_status), +#ifdef CONFIG_SCHED_DEBUG + REG("sched", S_IRUGO|S_IWUSR, pid_sched), +#endif INF("cmdline", S_IRUGO, pid_cmdline), INF("stat", S_IRUGO, tid_stat), INF("statm", S_IRUGO, pid_statm), |