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| author | dillon <dillon@FreeBSD.org> | 2000-03-27 21:38:35 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 2000-03-27 21:38:35 +0000 |
| commit | d7295a1a39d1518cf454629be7cb8e3e0623831d (patch) | |
| tree | f4dd9c13115dc5e1bab374059995b9003ac013fb /sys/nfsserver/nfs_srvsock.c | |
| parent | 5ccef75e02afa360480c05b8d01bdd8f2abc39bc (diff) | |
| download | FreeBSD-src-d7295a1a39d1518cf454629be7cb8e3e0623831d.zip FreeBSD-src-d7295a1a39d1518cf454629be7cb8e3e0623831d.tar.gz | |
Add a sysctl to specify the amount of UDP receive space NFS should
reserve, in maximal NFS packets. Originally only 2 packets worth of
space was reserved. The default is now 4, which appears to greatly
improve performance for slow to mid-speed machines on gigabit networks.
Add documentation and correct some prior documentation.
Problem Researched by: Andrew Gallatin <gallatin@cs.duke.edu>
Approved by: jkh
Diffstat (limited to 'sys/nfsserver/nfs_srvsock.c')
| -rw-r--r-- | sys/nfsserver/nfs_srvsock.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/sys/nfsserver/nfs_srvsock.c b/sys/nfsserver/nfs_srvsock.c index b2d6bf5..7d8bec4 100644 --- a/sys/nfsserver/nfs_srvsock.c +++ b/sys/nfsserver/nfs_srvsock.c @@ -119,11 +119,13 @@ static int proct[NFS_NPROCS] = { static int nfs_realign_test; static int nfs_realign_count; +static int nfs_bufpackets = 4; SYSCTL_DECL(_vfs_nfs); -SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RD, &nfs_realign_test, 0, ""); -SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RD, &nfs_realign_count, 0, ""); +SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test, 0, ""); +SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count, 0, ""); +SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, ""); /* @@ -201,6 +203,7 @@ nfs_connect(nmp, rep) { register struct socket *so; int s, error, rcvreserve, sndreserve; + int pktscale; struct sockaddr *saddr; struct sockaddr_in *sin; struct proc *p = &proc0; /* only used for socreate and sobind */ @@ -301,14 +304,25 @@ nfs_connect(nmp, rep) so->so_rcv.sb_timeo = 0; so->so_snd.sb_timeo = 0; } + + /* + * Get buffer reservation size from sysctl, but impose reasonable + * limits. + */ + pktscale = nfs_bufpackets; + if (pktscale < 2) + pktscale = 2; + if (pktscale > 64) + pktscale = 64; + if (nmp->nm_sotype == SOCK_DGRAM) { - sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; + sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale; rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) + - NFS_MAXPKTHDR) * 2; + NFS_MAXPKTHDR) * pktscale; } else if (nmp->nm_sotype == SOCK_SEQPACKET) { - sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; + sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale; rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) + - NFS_MAXPKTHDR) * 2; + NFS_MAXPKTHDR) * pktscale; } else { if (nmp->nm_sotype != SOCK_STREAM) panic("nfscon sotype"); @@ -337,9 +351,9 @@ nfs_connect(nmp, rep) sosetopt(so, &sopt); } sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR + - sizeof (u_int32_t)) * 2; + sizeof (u_int32_t)) * pktscale; rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR + - sizeof (u_int32_t)) * 2; + sizeof (u_int32_t)) * pktscale; } error = soreserve(so, sndreserve, rcvreserve); if (error) |
