Hoi, It typically defines hugepages for VPP. Many kernels will ship by default with hugepage support, but no amount of hugepages defined. The contents of a typical 80-vpp.conf sysctl file are:
# Number of 2MB hugepages desired vm.nr_hugepages=3072 # Must be greater than or equal to (2 * vm.nr_hugepages). vm.max_map_count=7168 # All groups allowed to access hugepages vm.hugetlb_shm_group=0 # Shared Memory Max must be greater or equal to the total size of hugepages. # For 2MB pages, TotalHugepageSize = vm.nr_hugepages * 2 * 1024 * 1024 # If the existing kernel.shmmax setting (cat /proc/sys/kernel/shmmax) # is greater than the calculated TotalHugepageSize then set this parameter # to current shmmax value. kernel.shmmax=6442450944 When the system boots, one of the things it does is read all files in /etc/sysctl.d/* and apply those settings. Think of it as a windows registry of sorts - you can query this by running 'sysctl -a' as root, and it'll show you all the variables and which settings they have. Hope that helps. groet, Pim On Fri, Dec 24, 2021 at 7:10 AM Akash S R <akashsr.akas...@gmail.com> wrote: > Hello Mates, > > May I know what is the use of /etc/sysctl.d/80-vpp.conf ? How to use it > or is that not necessary? > > /Akash > > > > -- Pim van Pelt <p...@ipng.nl> PBVP1-RIPE - http://www.ipng.nl/
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