On Nov 29, 2007 11:20 AM, Kris Kennaway <[EMAIL PROTECTED]> wrote: > Matt Reimer wrote: > > On Nov 29, 2007 10:58 AM, Kris Kennaway <[EMAIL PROTECTED]> wrote: > >> Pete French wrote: > >>> On the dual core processors this takes about 20 seconds. On the quad > >>> cores it takes about 3 minutes! This is true for both the 32 and 64 bit > >>> versions of FreeBSD :-( > >> That almost certainly has nothing to do with how many CPUs your system > >> has, since rm -rf is a single process running on a single core. > > > > I wonder if I'm seeing this too. Running super-smack on a 2 x quad > > core 1.6GHz Dell 1950 I get about 40000 qps, whereas on a 2 x dual > > core 3.0GHz box I've seen 80000 qps. > > Please, let's try to stay focused :) rm -rf has nothing to do with > super-smack and vice versa.
It's relevant to $subject. > > Is this expected? > > It is not very surprising. super-smack is not a good SMP benchmark, it > does stupid things like 1-byte I/O, so it is not very scalable nor a > good model of real-world database activity. Accounting for your CPUs > being twice as fast on the dual core, it roughly says that the benchmark > is not scaling beyond 4 CPUs, which is in line with my own observations. Is sysbench a better benchmark? It gives me 2362.99 on the 2 x dual-core box vs 1327.26 on the 2 x quad-core box. Matt _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
