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Changed mbuf allocation policy to get a cluster if size > MINCLSIZE. Makes

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a BIG difference in socket performance.
This commit is contained in:
dg 1994-05-29 07:48:17 +00:00
parent c64ef605af
commit 2f931bd070
1 changed files with 3 additions and 12 deletions
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15
sys/kern/uipc_socket.c
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@ -407,25 +407,15 @@ restart:
MGET(m, M_WAIT, MT_DATA);
mlen = MLEN;
}
if (resid >= MINCLSIZE && space >= MCLBYTES) {
if (resid >= MINCLSIZE) {
MCLGET(m, M_WAIT);
if ((m->m_flags & M_EXT) == 0)
goto nopages;
mlen = MCLBYTES;
#ifdef MAPPED_MBUFS
len = min(MCLBYTES, resid);
#else
if (atomic && top == 0) {
len = min(MCLBYTES - max_hdr, resid);
m->m_data += max_hdr;
} else
len = min(MCLBYTES, resid);
#endif
space -= MCLBYTES;
len = min(min(mlen, resid), space);
} else {
nopages:
len = min(min(mlen, resid), space);
space -= len;
/*
* For datagram protocols, leave room
* for protocol headers in first mbuf.
@ -433,6 +423,7 @@ nopages:
if (atomic && top == 0 && len < mlen)
MH_ALIGN(m, len);
}
space -= len;
error = uiomove(mtod(m, caddr_t), (int)len, uio);
resid = uio->uio_resid;
m->m_len = len;