Re: HyperThreading on Intel Xeon Haswell, a benefit?

2014-12-18 Thread Jia-Shiun Li
On Mon, Dec 15, 2014 at 1:40 PM, grarpamp wrote: > Thus to see what people were seeing perf wise. HTT good for *some* workload? Definitely yes. HTT good for yours? It depends. It is not a solution to boost everything. You really need your own evaluation methods for your own real world workload.

Re: HyperThreading on Intel Xeon Haswell, a benefit?

2014-12-10 Thread Jia-Shiun Li
On Tue, Dec 9, 2014 at 12:15 AM, Adrian Chadd wrote: > I've found that a memcpy heavy load (read: normal, non-zero copy > network traffic) brings SMT threads to their knees. A pair of threads > gets as much work done in normal UDP transmit/receive as a single > non-SMT thread. It looks like it's b

Re: FreeBSD 9.1 vs CentOS 6.3

2013-04-29 Thread Jia-Shiun Li
> Il 29/04/13 14:20, Jia-Shiun Li ha scritto: > >> On Fri, Mar 22, 2013 at 5:03 PM, Davide D'Amico >> wrote: >>> >>> Hi, I'm doing performance tests on a DELL R720, follows dmesg: >>> >>> Copyright (c) 1992-2012 The FreeBSD Project. &g

Re: FreeBSD 9.1 vs CentOS 6.3

2013-04-29 Thread Jia-Shiun Li
On Fri, Mar 22, 2013 at 5:03 PM, Davide D'Amico wrote: > Hi, I'm doing performance tests on a DELL R720, follows dmesg: > > Copyright (c) 1992-2012 The FreeBSD Project. > Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > The Regents of the University of California.

Re: FreeBSD 8.0 ixgbe Poor Performance

2010-04-22 Thread Jia-Shiun Li
On Thu, Apr 22, 2010 at 5:34 AM, Stephen Sanders wrote: > According to pciconf, the card is a "82598EB 10 Gigabit AF Dual Port > Network Connection". > > It looks to me like the card is plugged into a 4xPCIe slot.  I'm sure > this means we're not going to make the 10Gbps but I would imagine that >