On Wed, 04 Apr 2018 11:46:01 +0300, Kevin Wilson said: > Hello, > I have an x86_64 host with 4GB of Physical RAM running Fedora 25. > > I have a question about hugepages allocation on this host. > In: > https://www.kernel.org/doc/Documentation/vm/hugetlbpage.txt > > I see that you can use "hugepages=N" kernel parameter (in grub) for > specifying the number > of hugepages you want to allocate at boot time. First off, have you considered transparent hugepages, where the kernel will auto-coalesce memory allocation of contiguous pages into a hugepage? > The default hugepage size on this host is 2MB. > > For example, I am thinking of using > hugepagesz=2MB hugepages=4096 > in the kernel command line. Why? What are you hoping to accomplish? (Hint: Figure out why the default page size is only 4K rather than 2M - how much I/O do you need to do per page fault if you have a 2M pagesize) Do you have a workload that has a good chance of performing better with hugepages? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
