xnu-1228.5.20.tar.gz

[apple/xnu.git] / bsd / dev / unix_startup.c

diff --git a/bsd/dev/unix_startup.c b/bsd/dev/unix_startup.c
index 34514f27d28890e5103e6fdef923356f485d169c..d3df771967f28895321f6bfc8bda0071bdf1a077 100644 (file)
--- a/bsd/dev/unix_startup.c
+++ b/bsd/dev/unix_startup.c
@@ -43,30 +43,42 @@
 #include <sys/mbuf.h>
 #include <sys/systm.h>
 #include <sys/tty.h>
 #include <sys/mbuf.h>
 #include <sys/systm.h>
 #include <sys/tty.h>

+#include <sys/vnode.h>
+#include <sys/sysctl.h>

 #include <dev/ppc/cons.h>
 
 extern vm_map_t mb_map;
 
 #include <dev/ppc/cons.h>
 
 extern vm_map_t mb_map;
 

+#if INET || INET6

 extern u_long   tcp_sendspace;
 extern u_long   tcp_recvspace;
 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 *);
 
 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
 /*
  * 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
 #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
 
 #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;
 
 int             srv = 0;       /* Flag indicates a server boot when set */
 int             ncl = 0;
 


@@ -74,7 +86,7 @@ vm_map_t        buffer_map;
 vm_map_t        bufferhdr_map;
 
 
 vm_map_t        bufferhdr_map;
 
 

-extern void     bsd_startupearly(void);
+extern void     bsd_startupearly(void) __attribute__((section("__TEXT, initcode")));

 
 void
 bsd_startupearly(void)
 
 void
 bsd_startupearly(void)


@@ -83,21 +95,30 @@ bsd_startupearly(void)
        vm_size_t       size;
        kern_return_t   ret;
 
        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,
        size = round_page(size);
 
        ret = kmem_suballoc(kernel_map,


@@ -119,26 +140,41 @@ bsd_startupearly(void)
        if (ret != KERN_SUCCESS)
                panic("Failed to allocate bufferhdr_map");
 
        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;
 
                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 ((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
 }
 
 void


@@ -150,6 +186,7 @@ bsd_bufferinit(void)
 
        bsd_startupearly();
 
 
        bsd_startupearly();
 

+#if SOCKETS

        ret = kmem_suballoc(kernel_map,
                            (vm_offset_t *) & mbutl,
                            (vm_size_t) (nmbclusters * MCLBYTES),
        ret = kmem_suballoc(kernel_map,
                            (vm_offset_t *) & mbutl,
                            (vm_size_t) (nmbclusters * MCLBYTES),


@@ -159,9 +196,35 @@ bsd_bufferinit(void)
 
        if (ret != KERN_SUCCESS)
                panic("Failed to allocate mb_map\n");
 
        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();
 }
 
        /*
         * 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);
+}