Hi, my application is written in std C++ and it makes a matrix multiplication: so it uses only CPU and memory (no i/o, no network). I''m quite surprise that with CAP = 100% I got my results in about 600 seconds and with CAP = 50% I got my results in about 1800 seconds (around 3 times longer). For this kind of application I was expecting to get results in about 1200 seconds (2 times longer) for the second scenario with respect to the first one. Of course, the HW and SW are exactly the same for the 2 experiments. Am I wrong or the CAP mechanism is not working well? Thanks, Massimo
This is a good question. Vitaly. -----Original Message----- From: xen-users-bounces@lists.xen.org [mailto:xen-users-bounces@lists.xen.org] On Behalf Of Massimo Canonico Sent: Thursday, December 25, 2008 7:35 PM To: xen-users@lists.xen.org Subject: [Xen-users] CAP and performance problem Hi, my application is written in std C++ and it makes a matrix multiplication: so it uses only CPU and memory (no i/o, no network). I''m quite surprise that with CAP = 100% I got my results in about 600 seconds and with CAP = 50% I got my results in about 1800 seconds (around 3 times longer). For this kind of application I was expecting to get results in about 1200 seconds (2 times longer) for the second scenario with respect to the first one. Of course, the HW and SW are exactly the same for the 2 experiments. Am I wrong or the CAP mechanism is not working well? Thanks, Massimo _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Thanks, but this good question is still waiting for a good answer. Anyone? Cheers, Massimo On 05/15/2013 04:42 PM, Grinberg, Vitaly wrote:> This is a good question. > > Vitaly. > > > > -----Original Message----- > From: xen-users-bounces@lists.xen.org [mailto:xen-users-bounces@lists.xen.org] On Behalf Of Massimo Canonico > Sent: Thursday, December 25, 2008 7:35 PM > To: xen-users@lists.xen.org > Subject: [Xen-users] CAP and performance problem > > Hi, > my application is written in std C++ and it makes a matrix > multiplication: so it uses only CPU and memory (no i/o, no network). > > I''m quite surprise that with CAP = 100% I got my results in about 600 > seconds and with CAP = 50% I got my results in about 1800 seconds > (around 3 times longer). > > For this kind of application I was expecting to get results in about > 1200 seconds (2 times longer) for the second scenario with respect to > the first one. > > Of course, the HW and SW are exactly the same for the 2 experiments. > > Am I wrong or the CAP mechanism is not working well? > > Thanks, > Massimo > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users