22 Oct
2018
22 Oct
'18
6:18 p.m.
Hi Ricardo, I was able to select 4K and 2M pages in the following way (attached txt file). I'll try to see if I can get a system up with 1G pages, and I'll follow up with you. M On 2018-10-22 10:59 a.m., Michel Thebeau wrote: > Hi Ricardo, > > The documentation indicates to configure the the huge pages per numa > node on the compute, and to configure the flavour extra specs for the > VM. I am not aware of anything else in particular. There's some tips > and caveats in the document, but I don't see anything in your message > to think of those. > > If there's any chance you are trying to do this under virtualization, > I am not aware that that is currently supported. > > M > > > On 2018-10-19 6:14 p.m., Perez, Ricardo O wrote: >> Hi Michael, >> >> Thanks for your answer, I just forgot to put the computes information >> about memory configuration, here is the info: >> >> Compute-0 >> >> VM Pages >> 0 Reserved for Platform: 8000 MiB >> Usable Total: 86387 MiB >> Available: 84787 MiB >> 4K Pages: >> Total: 230656 >> 2M Hugepages: >> Total: 1271 >> Available: 983 >> 1G Hugepages: >> Total: 80 >> Available: 80 >> >> 1 Reserved for Platform: 2000 MiB >> Usable Total: 93698 MiB >> Available: 92674 MiB >> 4K Pages: >> Total: 29696 >> 2M Hugepages: >> Total: 5319 >> Available: 5319 >> 1G Hugepages: >> Total: 80 >> Available: 80 >> >> *********************************** >> Compute-1 >> Processor >> Memory >> VM Pages >> 0 Reserved for Platform: 8000 MiB >> Usable Total: 86504 MiB >> Available: 84968 MiB >> 4K Pages: >> Total: 0 >> 2M Hugepages: >> Total: 1780 >> Available: 1524 >> 1G Hugepages: >> Total: 80 >> Available: 80 >> >> 1 Reserved for Platform: 2000 MiB >> Usable Total: 93552 MiB >> Available: 92528 MiB >> 4K Pages: >> Total: 0 >> 2M Hugepages: >> Total: 5304 >> Available: 5304 >> 1G Hugepages: >> Total: 80 >> Available: 80 >> >> Am I missing something else to made use of 1G memory pages ? >> >> Thanks >> -Richo >> >>> -----Original Message----- >>> From: Michel Thebeau [mailto:michel.thebeau@windriver.com] >>> Sent: Friday, October 19, 2018 1:39 PM >>> To: Perez, Ricardo O <ricardo.o.perez@intel.com>; starlingx- >>> discuss@lists.starlingx.io >>> Subject: Re: [Starlingx-discuss] Question - Using 1Gb mem pages >>> >>> On 2018-10-19 1:45 p.m., Perez, Ricardo O wrote: >>>> Hello, >>>> >>>> I'm trying to execute a test, which his goal is to made use of huge >>>> pages (2M / >>> 1G) launching a VM. >>>> I have already verified the configuration of the controllers GRUB >>>> options and >>> we have defined the variable hugepagesz=1G, however, inside the same >>> parameters list, there is a "default_hugepagesz=2M". The default >>> hugepagesz, >>> has been modified to 1G, and the compute has been restarted with no >>> issues. >>> >>> >>> Hi Ricardo, >>> >>> You wrote, "controllers GRUB options" then "the compute has been >>> restarted >>> with no issues". Is there a GRUB option one can configure on the >>> controller that >>> is for the computes? I don't remember seeing one. If you're >>> actually changing >>> /etc/default/grub, I doubt that's supported. >>> I did not find a procedure for changing default_hugepagesz on >>> controllers or >>> computes grub configuration. >>> >>> It's supposed to be an option, for example through in horizon >>> interface or >>> 'system host-memory-modify'... but you didn't quote either of those. >>> >>> >>>> The flavor has been modified, with the following option: " >>> hw:mem_page_size=104875" (1G) page. >>> >>> >>> Is "104875" a typo? It looks a lot like 1024 * 1024 = 1048576, but not >>> quite. >>> >>> >>> M >>> >>> >>>> However when I launch a VM using the modified flavor it creates the >>>> VM, but if >>> I check the field values of the VM using " openstack server show >>> <vm_name>". >>> I'm getting the following value for pgsize: >>>> wrs-res:topology | node:0, 512MB, pgsize:2M, >>>> vcpus:0, pol:sha | >>>> >>>> So, seems like it's still taking the 2M pagesize instead of the 1G. >>>> >>>> What I have already tried is to: >>>> >>>> * Change also the image metadata: hw:mem_page_size=large and >>>> also >>> 104875. Result, VM launched successfully, but pgsize value still 2M. >>> >>> There's the interesting "104875" again. >>> >>> >>>> * Leave the GRUB default values, and use modified flavor to >>> hw:mem_page_size=104875, launch the VM with ERROR status. >>> >>> 104875 >>> >>>> * Leave the GRUB default values, and use modified flavor to >>> hw:mem_page_size=2048, launch the VM with success, , pgsize value is >>> 2M, >>> which is expected, ok. >>>> * Leave the GRUB default values, and use modified flavor to >>> hw:mem_page_size=small launch the VM with success, , pgsize value is >>> 4k, >>> which is expected, ok. >>>> * Leave the GRUB default values, and use modified flavor to >>> hw:mem_page_size=any launch the VM with success, , pgsize value is >>> 2M, which >>> is expected, ok. >>>> Could be this an issue trying to use 1G mem pages or do I'm missing >>>> some >>> other configuration parameter? >>>> Thanks in advance for your help >>>> >>>> >>>> _______________________________________________ >>>> Starlingx-discuss mailing list >>>> Starlingx-discuss@lists.starlingx.io >>>> http://lists.starlingx.io/cgi-bin/mailman/listinfo/starlingx-discuss >