Is there a limit on the number of hugepage entries that can be stored in the TLB
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I'm trying to analyze the network performance boosts that VMs get when they use hugepages. For this I configured the hypervisor to have several 1G hugepages (36) by changing the grub command line and rebooting and when launching the VMs I made sure the hugepages were being passed on to the VMs. On launching 8 VMs (each with 2 1G huge pages) and running network throughput tests between them, it was found that the throughput was drastically lower than when running without hugepages. That got me wondering, if it had something to do with the number of hugepages I was using. Is there a limit on the number of 1G hugepages that can be referenced using the TLB and if so, is it lower than the limit for regular sized pages? How do I know this information. In this scenario I was using an Ivy Bridge system, and...