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rx-tq-busy-20070516

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FIXES 60046

abstract tq busy wait code
This commit is contained in:
Chaskiel M Grundman 2007-05-16 21:44:07 +00:00 committed by Derrick Brashear
parent a900fe3089
commit 7a72e2445f
1 changed files with 21 additions and 40 deletions
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61
src/rx/rx.c
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@ -1039,6 +1039,24 @@ rx_GetConnection(register struct rx_connection *conn)
USERPRI;
}
/* Wait for the transmit queue to no longer be busy.
* requires the call->lock to be held */
static void rxi_WaitforTQBusy(struct rx_call *call) {
while (call->flags & RX_CALL_TQ_BUSY) {
call->flags |= RX_CALL_TQ_WAIT;
call->tqWaiters++;
#ifdef RX_ENABLE_LOCKS
osirx_AssertMine(&call->lock, "rxi_WaitforTQ lock");
CV_WAIT(&call->cv_tq, &call->lock);
#else /* RX_ENABLE_LOCKS */
osi_rxSleep(&call->tq);
#endif /* RX_ENABLE_LOCKS */
call->tqWaiters--;
if (call->tqWaiters == 0) {
call->flags &= ~RX_CALL_TQ_WAIT;
}
}
}
/* Start a new rx remote procedure call, on the specified connection.
* If wait is set to 1, wait for a free call channel; otherwise return
* 0. Maxtime gives the maximum number of seconds this call may take,
@ -1164,20 +1182,7 @@ rx_NewCall(register struct rx_connection *conn)
#ifdef AFS_GLOBAL_RXLOCK_KERNEL
/* Now, if TQ wasn't cleared earlier, do it now. */
MUTEX_ENTER(&call->lock);
while (call->flags & RX_CALL_TQ_BUSY) {
call->flags |= RX_CALL_TQ_WAIT;
call->tqWaiters++;
#ifdef RX_ENABLE_LOCKS
osirx_AssertMine(&call->lock, "rxi_Start lock4");
CV_WAIT(&call->cv_tq, &call->lock);
#else /* RX_ENABLE_LOCKS */
osi_rxSleep(&call->tq);
#endif /* RX_ENABLE_LOCKS */
call->tqWaiters--;
if (call->tqWaiters == 0) {
call->flags &= ~RX_CALL_TQ_WAIT;
}
}
rxi_WaitforTQBusy(call);
if (call->flags & RX_CALL_TQ_CLEARME) {
rxi_ClearTransmitQueue(call, 0);
queue_Init(&call->tq);
@ -3891,19 +3896,7 @@ rxi_ReceiveAckPacket(register struct rx_call *call, struct rx_packet *np,
return np;
}
call->flags |= RX_CALL_FAST_RECOVER_WAIT;
while (call->flags & RX_CALL_TQ_BUSY) {
call->flags |= RX_CALL_TQ_WAIT;
call->tqWaiters++;
#ifdef RX_ENABLE_LOCKS
osirx_AssertMine(&call->lock, "rxi_Start lock2");
CV_WAIT(&call->cv_tq, &call->lock);
#else /* RX_ENABLE_LOCKS */
osi_rxSleep(&call->tq);
#endif /* RX_ENABLE_LOCKS */
call->tqWaiters--;
if (call->tqWaiters == 0)
call->flags &= ~RX_CALL_TQ_WAIT;
}
rxi_WaitforTQBusy(call);
MUTEX_ENTER(&peer->peer_lock);
#endif /* AFS_GLOBAL_RXLOCK_KERNEL */
call->flags &= ~RX_CALL_FAST_RECOVER_WAIT;
@ -5111,19 +5104,7 @@ rxi_Start(struct rxevent *event, register struct rx_call *call,
return;
}
call->flags |= RX_CALL_FAST_RECOVER_WAIT;
while (call->flags & RX_CALL_TQ_BUSY) {
call->flags |= RX_CALL_TQ_WAIT;
call->tqWaiters++;
#ifdef RX_ENABLE_LOCKS
osirx_AssertMine(&call->lock, "rxi_Start lock1");
CV_WAIT(&call->cv_tq, &call->lock);
#else /* RX_ENABLE_LOCKS */
osi_rxSleep(&call->tq);
#endif /* RX_ENABLE_LOCKS */
call->tqWaiters--;
if (call->tqWaiters == 0)
call->flags &= ~RX_CALL_TQ_WAIT;
}
rxi_WaitforTQBusy(call);
#endif /* AFS_GLOBAL_RXLOCK_KERNEL */
call->flags &= ~RX_CALL_FAST_RECOVER_WAIT;
call->flags |= RX_CALL_FAST_RECOVER;