From: "Paul E. McKenney" <[email protected]> This commit adds a per-RCU-flavor "rcuexp" file that dumps out statistics for synchonize_sched_expedited().
Signed-off-by: Paul E. McKenney <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- kernel/rcutree_trace.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 44 insertions(+), 0 deletions(-) diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c index c6f9cb3..e84679c 100644 --- a/kernel/rcutree_trace.c +++ b/kernel/rcutree_trace.c @@ -171,6 +171,45 @@ static const struct file_operations rcudata_fops = { .release = seq_release, }; +static int show_rcuexp(struct seq_file *m, void *v) +{ + struct rcu_state *rsp = (struct rcu_state *)v; + + seq_printf(m, "s=%lu d=%lu w=%lu tf=%lu wd1=%lu wd2=%lu n=%lu sc=%lu dt=%lu dl=%lu dx=%lu", + atomic_long_read(&rsp->expedited_start), + atomic_long_read(&rsp->expedited_done), + atomic_long_read(&rsp->expedited_wrap), + atomic_long_read(&rsp->expedited_tryfail), + atomic_long_read(&rsp->expedited_workdone1), + atomic_long_read(&rsp->expedited_workdone2), + atomic_long_read(&rsp->expedited_normal), + atomic_long_read(&rsp->expedited_stoppedcpus), + atomic_long_read(&rsp->expedited_done_tries), + atomic_long_read(&rsp->expedited_done_lost), + atomic_long_read(&rsp->expedited_done_exit)); + return 0; +} + +static const struct seq_operations rcuexp_op = { + .start = r_start, + .next = r_next, + .stop = r_stop, + .show = show_rcuexp, +}; + +static int rcuexp_open(struct inode *inode, struct file *file) +{ + return r_open(inode, file, &rcuexp_op); +} + +static const struct file_operations rcuexp_fops = { + .owner = THIS_MODULE, + .open = rcuexp_open, + .read = seq_read, + .llseek = no_llseek, + .release = seq_release, +}; + #ifdef CONFIG_RCU_BOOST static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) @@ -402,6 +441,11 @@ static int __init rcutree_trace_init(void) if (!retval) goto free_out; + retval = debugfs_create_file("rcuexp", 0444, + rspdir, rsp, &rcuexp_fops); + if (!retval) + goto free_out; + retval = debugfs_create_file("rcu_pending", 0444, rspdir, rsp, &rcu_pending_fops); if (!retval) -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
