Fine-grained locking for POSIX local sockets (UNIX domain
rwatson at FreeBSD.org
Mon May 8 07:35:13 UTC 2006
On Mon, 8 May 2006, Kris Kennaway wrote:
> unp contention has risen a bit. The other big gain is to sleep mtxpool
> contention, which roughly doubled:
In the general case, you can increase the size of the mutex pool. However,
since this is per-uid for the socket buffer resource limits, that won't help
you as the same user will always contend with itself. We'll need to think
about this some -- good activity for the plane today :-).
Nice work so far, btw. Sounds like we're making real headway!
Robert N M Watson
> * Change the total socket buffer size a user has used.
> chgsbsize(uip, hiwat, to, max)
> struct uidinfo *uip;
> u_int *hiwat;
> u_int to;
> rlim_t max;
> rlim_t new;
> So the next question is how can that be optimized?
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