Messages in this thread Patch in this message | | | Date | Thu, 24 Mar 2011 13:48:03 -0400 | From | Joe Korty <> | Subject | [PATCH 17/24] jrcu: track #passes since last end-of-batch |
| |
jrcu: track how many passes have gone by since last end-of-batch.
Signed-off-by: Joe Korty <joe.korty@ccur.com>
Index: b/kernel/jrcu.c =================================================================== --- a/kernel/jrcu.c +++ b/kernel/jrcu.c @@ -120,6 +120,7 @@ static struct rcu_data rcu_data[NR_CPUS] /* debug & statistics stuff */ static struct rcu_stats { unsigned npasses; /* #passes made */ + unsigned nlast; /* #passes since last end-of-batch */ unsigned nbatches; /* #end-of-batches (eobs) seen */ atomic_t nbarriers; /* #rcu barriers processed */ atomic_t nsyncs; /* #rcu syncs processed */ @@ -329,6 +330,8 @@ static void __rcu_delimit_batches(struct * gone by. */ rcu_now = sched_clock(); + rcu_stats.nlast++; + if (!eob && !rcu_timestamp && ((rcu_now - rcu_timestamp) > (s64)rcu_wdog * NSEC_PER_SEC)) { rcu_stats.nforced++; @@ -389,6 +392,7 @@ static void __rcu_delimit_batches(struct */ xchg(&rcu_which, prev); /* only place where rcu_which is written to */ rcu_stats.nbatches++; + rcu_stats.nlast = 0; } static void rcu_delimit_batches(void) @@ -598,6 +602,8 @@ static int rcu_debugfs_show(struct seq_f rcu_stats.nbatches); seq_printf(m, "%14u: #passes not resulting in end-of-batch\n", rcu_stats.npasses - rcu_stats.nbatches); + seq_printf(m, "%14u: #passes since last end-of-batch\n", + rcu_stats.nlast); seq_printf(m, "%14u: #msecs since last end-of-batch\n", msecs); seq_printf(m, "%14u: #passes forced (0 is best)\n",
| |