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| author | Andreea-Cristina Bernat <bernat.ada@gmail.com> | 2014-03-17 18:33:28 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-04-29 08:44:49 -0700 |
| commit | 7941dbdebe2a1fda31aefa033794510f95720a5a (patch) | |
| tree | 8c876f6faaca31a8f3a06269741d104fbcd8063d /kernel/rcu/tree.c | |
| parent | af952b919bf9e2cf3c4e839359cfd033d98aa011 (diff) | |
| download | talos-obmc-linux-7941dbdebe2a1fda31aefa033794510f95720a5a.tar.gz talos-obmc-linux-7941dbdebe2a1fda31aefa033794510f95720a5a.zip | |
rcu: Add event tracing to dyntick_save_progress_counter().
This patch adds event tracing to dyntick_save_progress_counter() in the case
where it returns 1. I used the tracepoint string "dti" because this function
returns 1 in case the CPU is in dynticks idle mode.
Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index fca911b6b29c..c6fd0f15425c 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -772,7 +772,12 @@ static int dyntick_save_progress_counter(struct rcu_data *rdp, { rdp->dynticks_snap = atomic_add_return(0, &rdp->dynticks->dynticks); rcu_sysidle_check_cpu(rdp, isidle, maxj); - return (rdp->dynticks_snap & 0x1) == 0; + if ((rdp->dynticks_snap & 0x1) == 0) { + trace_rcu_fqs(rdp->rsp->name, rdp->gpnum, rdp->cpu, TPS("dti")); + return 1; + } else { + return 0; + } } /* |
