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Stop fiddling thread priority with msleep, eliminating unnecessary

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context switching. This improves performance about 30% on UP machine.
This commit is contained in:
David Xu 2005-12-12 05:04:56 +00:00
parent 4b99735d08
commit dd1a6f53ac
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=153332
1 changed files with 2 additions and 2 deletions
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4
sys/kern/uipc_mqueue.c
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@ -1643,7 +1643,7 @@ _mqueue_send(struct mqueue *mq, struct mqueue_msg *msg, int timo)
} }
mq->mq_senders++; mq->mq_senders++;
error = msleep(&mq->mq_senders, &mq->mq_mutex, error = msleep(&mq->mq_senders, &mq->mq_mutex,
PSOCK | PCATCH, "mqsend", timo); curthread->td_priority | PCATCH, "mqsend", timo);
mq->mq_senders--; mq->mq_senders--;
if (error == EAGAIN) if (error == EAGAIN)
error = ETIMEDOUT; error = ETIMEDOUT;
@ -1795,7 +1795,7 @@ _mqueue_recv(struct mqueue *mq, struct mqueue_msg **msg, int timo)
} }
mq->mq_receivers++; mq->mq_receivers++;
error = msleep(&mq->mq_receivers, &mq->mq_mutex, error = msleep(&mq->mq_receivers, &mq->mq_mutex,
PSOCK | PCATCH, "mqrecv", timo); curthread->td_priority | PCATCH, "mqrecv", timo);
mq->mq_receivers--; mq->mq_receivers--;
if (error == EAGAIN) if (error == EAGAIN)
error = ETIMEDOUT; error = ETIMEDOUT;