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stop nfs tick when we have nothing to do.

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This commit is contained in:
yamt 2007-07-27 10:03:58 +00:00
parent 662e7a9e40
commit c90a0e2579
4 changed files with 63 additions and 17 deletions
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5
sys/nfs/nfs_serv.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: nfs_serv.c,v 1.128 2007/04/06 14:28:28 hannken Exp $ */
/* $NetBSD: nfs_serv.c,v 1.129 2007/07/27 10:03:58 yamt Exp $ */
/*
* Copyright (c) 1989, 1993
@ -55,7 +55,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.128 2007/04/06 14:28:28 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: nfs_serv.c,v 1.129 2007/07/27 10:03:58 yamt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -1287,6 +1287,7 @@ loop1:
splx(s);
goto loop1;
}
nfs_timer_start();
splx(s);
/*

65
sys/nfs/nfs_socket.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: nfs_socket.c,v 1.160 2007/07/09 21:11:30 ad Exp $ */
/* $NetBSD: nfs_socket.c,v 1.161 2007/07/27 10:03:58 yamt Exp $ */
/*
* Copyright (c) 1989, 1991, 1993, 1995
@ -39,7 +39,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.160 2007/07/09 21:11:30 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.161 2007/07/27 10:03:58 yamt Exp $");
#include "fs_nfs.h"
#include "opt_nfs.h"
@ -49,6 +49,7 @@ __KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.160 2007/07/09 21:11:30 ad Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/evcnt.h>
#include <sys/callout.h>
#include <sys/proc.h>
#include <sys/mount.h>
@ -166,7 +167,10 @@ static const int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, };
int nfsrtton = 0;
struct nfsrtt nfsrtt;
struct nfsreqhead nfs_reqq;
callout_t nfs_timer_ch;
static callout_t nfs_timer_ch;
static struct evcnt nfs_timer_ev;
static struct evcnt nfs_timer_start_ev;
static struct evcnt nfs_timer_stop_ev;
static int nfs_sndlock(struct nfsmount *, struct nfsreq *);
static void nfs_sndunlock(struct nfsmount *);
@ -1122,6 +1126,7 @@ tryagain:
*/
s = splsoftnet();
TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain);
nfs_timer_start();
/*
* If backing off another request or avoiding congestion, don't
@ -1563,6 +1568,38 @@ nfs_rephead(siz, nd, slp, err, cache, frev, mrq, mbp, bposp)
return (0);
}
static void
nfs_timer_schedule(void)
{
callout_schedule(&nfs_timer_ch, nfs_ticks);
}
void
nfs_timer_start(void)
{
if (callout_pending(&nfs_timer_ch))
return;
nfs_timer_start_ev.ev_count++;
nfs_timer_schedule();
}
void
nfs_timer_init(void)
{
callout_init(&nfs_timer_ch, 0);
callout_setfunc(&nfs_timer_ch, nfs_timer, NULL);
evcnt_attach_dynamic(&nfs_timer_ev, EVCNT_TYPE_MISC, NULL,
"nfs", "timer");
evcnt_attach_dynamic(&nfs_timer_start_ev, EVCNT_TYPE_MISC, NULL,
"nfs", "timer start");
evcnt_attach_dynamic(&nfs_timer_stop_ev, EVCNT_TYPE_MISC, NULL,
"nfs", "timer stop");
}
/*
* Nfs timer routine
* Scan the nfsreq list and retranmit any requests that have timed out
@ -1579,19 +1616,18 @@ nfs_timer(void *arg)
struct nfsmount *nmp;
int timeo;
int s, error;
bool more = false;
#ifdef NFSSERVER
struct timeval tv;
struct nfssvc_sock *slp;
u_quad_t cur_usec;
#endif
if (arg != NULL) {
callout_init(&nfs_timer_ch, 0);
callout_setfunc(&nfs_timer_ch, nfs_timer, NULL);
}
nfs_timer_ev.ev_count++;
s = splsoftnet();
TAILQ_FOREACH(rep, &nfs_reqq, r_chain) {
more = true;
nmp = rep->r_nmp;
if (rep->r_mrep || (rep->r_flags & R_SOFTTERM))
continue;
@ -1692,13 +1728,20 @@ nfs_timer(void *arg)
getmicrotime(&tv);
cur_usec = (u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec;
TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
if (LIST_FIRST(&slp->ns_tq) &&
LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec)
nfsrv_wakenfsd(slp);
if (LIST_FIRST(&slp->ns_tq)) {
if (LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) {
nfsrv_wakenfsd(slp);
}
more = true;
}
}
#endif /* NFSSERVER */
splx(s);
callout_schedule(&nfs_timer_ch, nfs_ticks);
if (more) {
nfs_timer_schedule();
} else {
nfs_timer_stop_ev.ev_count++;
}
}
/*

6
sys/nfs/nfs_subs.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: nfs_subs.c,v 1.190 2007/07/09 21:29:09 ad Exp $ */
/* $NetBSD: nfs_subs.c,v 1.191 2007/07/27 10:03:58 yamt Exp $ */
/*
* Copyright (c) 1989, 1993
@ -70,7 +70,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nfs_subs.c,v 1.190 2007/07/09 21:29:09 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: nfs_subs.c,v 1.191 2007/07/27 10:03:58 yamt Exp $");
#include "fs_nfs.h"
#include "opt_nfs.h"
@ -1526,7 +1526,7 @@ nfs_init0(void)
* Initialize reply list and start timer
*/
TAILQ_INIT(&nfs_reqq);
nfs_timer(nfs_timer);
nfs_timer_init();
MOWNER_ATTACH(&nfs_mowner);
#ifdef NFS

4
sys/nfs/nfs_var.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: nfs_var.h,v 1.70 2007/07/20 15:36:42 yamt Exp $ */
/* $NetBSD: nfs_var.h,v 1.71 2007/07/27 10:03:58 yamt Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@ -190,6 +190,8 @@ int nfs_request(struct nfsnode *, struct mbuf *, int, struct lwp *,
int nfs_rephead(int, struct nfsrv_descript *, struct nfssvc_sock *,
int, int, u_quad_t *, struct mbuf **, struct mbuf **, char **);
void nfs_timer(void *);
void nfs_timer_init(void);
void nfs_timer_start(void);
int nfs_sigintr(struct nfsmount *, struct nfsreq *, struct lwp *);
int nfs_getreq(struct nfsrv_descript *, struct nfsd *, int);
int nfs_msg(struct lwp *, const char *, const char *);