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# # tuned configuration # [main] summary=Optimize for HPC compute workloads description=Configures virtual memory, CPU governors, and network settings for HPC compute workloads. include=latency-performance [vm] # Most HPC application can take advantage of hugepages. Force them to on. transparent_hugepages=always [disk] # Increase the readahead value to support large, contiguous, files. readahead=>4096 [sysctl] # Forces hugepages to be allocated on non-hotpluggable memory vm.hugepages_treat_as_movable=0 # Keep a reasonable amount of memory free to support large mem requests vm.min_free_kbytes=135168 # Most HPC applications are NUMA aware. Enabling zone reclaim ensures # memory is reclaimed and reallocated from local pages. Disabling # automatic NUMA balancing prevents unwanted memory unmapping. vm.zone_reclaim_mode=1 kernel.numa_balancing=0 # Busy polling helps reduce latency in the network receive path # by allowing socket layer code to poll the receive queue of a # network device, and disabling network interrupts. # busy_read value greater than 0 enables busy polling. Recommended # net.core.busy_read value is 50. # busy_poll value greater than 0 enables polling globally. # Recommended net.core.busy_poll value is 50 net.core.busy_read=50 net.core.busy_poll=50 # TCP fast open reduces network latency by enabling data exchange # during the sender's initial TCP SYN. The value 3 enables fast open # on client and server connections. net.ipv4.tcp_fastopen=3