From: Eric Dumazet <dada1@xxxxxxxxxxxxx> Date: Fri, 21 Nov 2008 09:51:32 +0100 > Now, I wish sockets and pipes not going through dcache, not tbench affair > of course but real workloads... > > running 8 processes on a 8 way machine doing a > > for (;;) > close(socket(AF_INET, SOCK_STREAM, 0)); > > is slow as hell, we hit so many contended cache lines ... > > ticket spin locks are slower in this case (dcache_lock for example > is taken twice when we allocate a socket(), once in d_alloc(), another one > in d_instantiate()) As you of course know, this used to be a ton worse. At least now these things are unhashed. :) -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
