On 31/08/15 18:42, Meng Xu wrote: > Hi Chao, > > I'm Meng Xu from the University of Pennsylvania. > > We purchased a computer that has Intel(R) Xeon(R) CPU E5-2618L v3 @ > 2.30GHz inside. > According to > http://www.intel.com/content/www/us/en/communications/cache-monitoring-cache-allocation-technologies.html, > Intel E5-2618L v3 should support both CAT and CMT. > > I'm playing the latest Xen on the machine to evaluate how CAT and CMT > work > . > > > The commit point I used is in the staging branch, commit > 7b99717f62caeac08eea224a177cd28f047ac4b5, which was push on Aug. 17th, > 2015. > I checked that the branch has merged your code. > > After I boot up the system, I tried the following commands and it > shows some errors. > > *** > My question is > *** > : > 1) Is there any specific BIOS configuration I need to configure? > 2) The CMT is not enabled by default. Do I need to issue any command > to enable it? I didn't find any document about how to enable it, > according to > http://xenbits.xen.org/docs/unstable-staging/misc/xl-psr.html. :-( > 3) I'm not 100% sure if this machine we purchased supports the CAT. > Right now, it shows "No such device" on the machine. > But it may probably because the hypervisor forgot to initialize it? > > > Below is the details of what I tried: > > # xl psr-hwinfo > Cache Monitoring Technology (CMT): > Enabled : 0 > Cache Allocation Technology (CAT): > libxl: error: libxl_psr.c:96:libxl__psr_cat_log_err_msg: CAT is not > supported in this system: No such device > Failed to get cat info > > #xl psr-cmt-attach 0 > libxl: error: libxl_psr.c:70:libxl__psr_cmt_log_err_msg: CMT is not > supported in this system: No such device > > Please let me know if you need any further information to confirm if > the machine support the CAT or if it's because there is some issue > with the software layer. :-) > > Thank you very much for your time and help in this question! > > Best regards, > > Meng
To get started, use "psr=cat,cmt" on the Xen command line. Neither are enabled by default as they can potentially allocate quite a lot of resources behind the scenes. ~Andrew
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