X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..ca66cea69e6e866fd781ae2260d9474bdd48f2ca:/bsd/dev/unix_startup.c diff --git a/bsd/dev/unix_startup.c b/bsd/dev/unix_startup.c index fc8bb8f41..d3df77196 100644 --- a/bsd/dev/unix_startup.c +++ b/bsd/dev/unix_startup.c @@ -1,14 +1,19 @@ /* * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER @@ -18,7 +23,7 @@ * Please see the License for the specific language governing rights and * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1992,7 NeXT Computer, Inc. @@ -38,30 +43,42 @@ #include #include #include +#include +#include #include extern vm_map_t mb_map; +#if INET || INET6 extern u_long tcp_sendspace; extern u_long tcp_recvspace; +#endif -void bsd_bufferinit(void); +void bsd_bufferinit(void) __attribute__((section("__TEXT, initcode"))); extern void md_prepare_for_shutdown(int, int, char *); +int bsd_mbuf_cluster_reserve(void); + /* * Declare these as initialized data so we can patch them. */ #ifdef NBUF -int nbuf = NBUF; -int niobuf = NBUF / 2; - +int max_nbuf_headers = NBUF; +int niobuf_headers = NBUF / 2; +int nbuf_hashelements = NBUF; +int nbuf_headers = NBUF; #else -int nbuf = 0; -int niobuf = 0; - +int max_nbuf_headers = 0; +int niobuf_headers = 0; +int nbuf_hashelements = 0; +int nbuf_headers = 0; #endif +SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RD, &nbuf_headers, 0, ""); +SYSCTL_INT (_kern, OID_AUTO, maxnbuf, CTLFLAG_RW, &max_nbuf_headers, 0, ""); + +__private_extern__ int customnbuf = 0; int srv = 0; /* Flag indicates a server boot when set */ int ncl = 0; @@ -69,7 +86,7 @@ vm_map_t buffer_map; vm_map_t bufferhdr_map; -extern void bsd_startupearly(void); +extern void bsd_startupearly(void) __attribute__((section("__TEXT, initcode"))); void bsd_startupearly(void) @@ -78,21 +95,30 @@ bsd_startupearly(void) vm_size_t size; kern_return_t ret; - if (nbuf == 0) - nbuf = atop(sane_size / 100); /* Get 1% of ram, but no more than we can map */ - if (nbuf > 8192) - nbuf = 8192; - if (nbuf < 256) - nbuf = 256; - - if (niobuf == 0) - niobuf = nbuf; - if (niobuf > 4096) - niobuf = 4096; - if (niobuf < 128) - niobuf = 128; - - size = (nbuf + niobuf) * sizeof(struct buf); + /* clip the number of buf headers upto 16k */ + if (max_nbuf_headers == 0) + max_nbuf_headers = atop(sane_size / 50); /* Get 2% of ram, but no more than we can map */ + if ((customnbuf == 0) && (max_nbuf_headers > 16384)) + max_nbuf_headers = 16384; + if (max_nbuf_headers < CONFIG_MIN_NBUF) + max_nbuf_headers = CONFIG_MIN_NBUF; + + /* clip the number of hash elements to 200000 */ + if ( (customnbuf == 0 ) && nbuf_hashelements == 0) { + nbuf_hashelements = atop(sane_size / 50); + if (nbuf_hashelements > 200000) + nbuf_hashelements = 200000; + } else + nbuf_hashelements = max_nbuf_headers; + + if (niobuf_headers == 0) + niobuf_headers = max_nbuf_headers; + if (niobuf_headers > 4096) + niobuf_headers = 4096; + if (niobuf_headers < CONFIG_MIN_NIOBUF) + niobuf_headers = CONFIG_MIN_NIOBUF; + + size = (max_nbuf_headers + niobuf_headers) * sizeof(struct buf); size = round_page(size); ret = kmem_suballoc(kernel_map, @@ -114,26 +140,41 @@ bsd_startupearly(void) if (ret != KERN_SUCCESS) panic("Failed to allocate bufferhdr_map"); - buf = (struct buf *) firstaddr; - bzero(buf, size); + buf_headers = (struct buf *) firstaddr; + bzero(buf_headers, size); - if (sane_size > (64 * 1024 * 1024) || ncl) { +#if SOCKETS + { int scale; - if ((nmbclusters = ncl) == 0) { - if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768) - nmbclusters = 32768; - } + nmbclusters = bsd_mbuf_cluster_reserve() / MCLBYTES; + +#if INET || INET6 if ((scale = nmbclusters / NMBCLUSTERS) > 1) { tcp_sendspace *= scale; tcp_recvspace *= scale; - if (tcp_sendspace > (32 * 1024)) - tcp_sendspace = 32 * 1024; - if (tcp_recvspace > (32 * 1024)) - tcp_recvspace = 32 * 1024; + if (tcp_sendspace > (64 * 1024)) + tcp_sendspace = 64 * 1024; + if (tcp_recvspace > (64 * 1024)) + tcp_recvspace = 64 * 1024; } +#endif /* INET || INET6 */ } +#endif /* SOCKETS */ + + /* + * Size vnodes based on memory + * Number vnodes is (memsize/64k) + 1024 + * This is the calculation that is used by launchd in tiger + * we are clipping the max based on 16G + * ie ((16*1024*1024*1024)/(64 *1024)) + 1024 = 263168; + * CONFIG_VNODES is set to 263168 for "medium" configurations (the default) + * but can be smaller or larger. + */ + desiredvnodes = (sane_size/65536) + 1024; + if (desiredvnodes > CONFIG_VNODES) + desiredvnodes = CONFIG_VNODES; } void @@ -145,6 +186,7 @@ bsd_bufferinit(void) bsd_startupearly(); +#if SOCKETS ret = kmem_suballoc(kernel_map, (vm_offset_t *) & mbutl, (vm_size_t) (nmbclusters * MCLBYTES), @@ -154,9 +196,35 @@ bsd_bufferinit(void) if (ret != KERN_SUCCESS) panic("Failed to allocate mb_map\n"); +#endif /* SOCKETS */ /* * Set up buffers, so they can be used to read disk labels. */ bufinit(); } + + +/* + * this has been broken out into a separate routine that + * can be called from the x86 early vm initialization to + * determine how much lo memory to reserve on systems with + * DMA hardware that can't fully address all of the physical + * memory that is present. + */ +int +bsd_mbuf_cluster_reserve(void) +{ + if (sane_size > (64 * 1024 * 1024) || ncl) { + + if ((nmbclusters = ncl) == 0) { + if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768) + nmbclusters = 32768; + } + /* Make sure it's not odd in case ncl is manually set */ + if (nmbclusters & 0x1) + --nmbclusters; + } + + return (nmbclusters * MCLBYTES); +}