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c3229e05a3
a hashed port list. In the new scheme, in_pcblookup() goes away and is
replaced by a new routine, in_pcblookup_local() for doing the local port
check. Note that this implementation is space inefficient in that the PCB
struct is now too large to fit into 128 bytes. I might deal with this in the
future by using the new zone allocator, but I wanted these changes to be
extensively tested in their current form first.
Also:
1) Fixed off-by-one errors in the port lookup loops in in_pcbbind().
2) Got rid of some unneeded rehashing. Adding a new routine, in_pcbinshash()
to do the initialial hash insertion.
3) Renamed in_pcblookuphash() to in_pcblookup_hash() for easier readability.
4) Added a new routine, in_pcbremlists() to remove the PCB from the various
hash lists.
5) Added/deleted comments where appropriate.
6) Removed unnecessary splnet() locking. In general, the PCB functions should
be called at splnet()...there are unfortunately a few exceptions, however.
7) Reorganized a few structs for better cache line behavior.
8) Killed my TCP_ACK_HACK kludge. It may come back in a different form in
the future, however.
These changes have been tested on wcarchive for more than a month. In tests
done here, connection establishment overhead is reduced by more than 50
times, thus getting rid of one of the major networking scalability problems.
Still to do: make tcp_fastimo/tcp_slowtimo scale well for systems with a
large number of connections. tcp_fastimo is easy; tcp_slowtimo is difficult.
WARNING: Anything that knows about inpcb and tcpcb structs will have to be
recompiled; at the very least, this includes netstat(1).
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| compile | ||
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| ddb | ||
| dev | ||
| fs | ||
| geom | ||
| gnu | ||
| i386 | ||
| isa | ||
| isofs/cd9660 | ||
| kern | ||
| libkern | ||
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| msdosfs | ||
| net | ||
| netatalk | ||
| netinet | ||
| netipx | ||
| netkey | ||
| netnatm | ||
| netns | ||
| nfs | ||
| nfsclient | ||
| nfsserver | ||
| pc98 | ||
| pccard | ||
| pci | ||
| powerpc/include | ||
| rpc | ||
| scsi | ||
| sys | ||
| tools | ||
| ufs | ||
| vm | ||
| Makefile | ||