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rcu: Trace callback acceleration

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This commit adds event tracing for callback acceleration to allow better
tracking of callbacks through the system.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2012-11-27 16:55:44 -08:00
parent dc35c8934e
commit 6d4b418c75
2 changed files with 10 additions and 2 deletions
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6
kernel/rcutree.c
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@@ -1168,6 +1168,12 @@ static void rcu_accelerate_cbs(struct rcu_state *rsp, struct rcu_node *rnp,
rdp->nxttail[i] = rdp->nxttail[RCU_NEXT_TAIL];
rdp->nxtcompleted[i] = c;
}
/* Trace depending on how much we were able to accelerate. */
if (!*rdp->nxttail[RCU_WAIT_TAIL])
trace_rcu_grace_period(rsp->name, rdp->gpnum, "AccWaitCB");
else
trace_rcu_grace_period(rsp->name, rdp->gpnum, "AccReadyCB");
}
/*