Memcached odd behaviour on intel xeon E5-4610

2015-02-09 Thread Saman Barghi
I am running some tests using memached 1.4.22 over an Intel Xeon E5 (4 sockets with 8 core each, 2 Hyper threads per core, and 4 NUMA nodes) and running Ubuntu trusty. I compiled memcached with gcc-4.8.2 with default CFLAGS and configuration options. The problem is whenever I start memcached

Re: Memcached odd behaviour on intel xeon E5-4610

2015-02-09 Thread dormando
I am running some tests using memached 1.4.22 over an Intel Xeon E5 (4 sockets with 8 core each, 2 Hyper threads per core, and 4 NUMA nodes) and  running Ubuntu trusty. I compiled memcached with gcc-4.8.2 with default CFLAGS and configuration options. The problem is whenever I start

Re: Memcached odd behaviour on intel xeon E5-4610

2015-02-09 Thread Saman Barghi
Thanks for you response, find my response below: On Mon, Feb 9, 2015 at 1:39 PM, dormando dorma...@rydia.net wrote: I am running some tests using memached 1.4.22 over an Intel Xeon E5 (4 sockets with 8 core each, 2 Hyper threads per core, and 4 NUMA nodes) and running Ubuntu trusty. I

Re: Memcached odd behaviour on intel xeon E5-4610

2015-02-09 Thread Saman Barghi
Btw, I already considered avoiding hyper threads and running all server threads on the same socket (to avoid cross socket latencies and better cache usage), but it does not seem to be a hardware related problem. On Mon, Feb 9, 2015 at 4:29 PM, Saman Barghi sama...@gmail.com wrote: Thanks for

Re: Memcached odd behaviour on intel xeon E5-4610

2015-02-09 Thread Saman Barghi
I see, you are right it makes more sense to be a client side problem in this case. I write a small test program and if the problem still exists I will get back to you. Thanks for your help, Saman On Mon, Feb 9, 2015 at 4:39 PM, dormando dorma...@rydia.net wrote: If mc-crusher engages all