tjh.dev
nixpkgs mirror (for testing)
github.com/NixOS/nixpkgs
nix
dpdk: simplify optimization for CPU family
Make it easier optimize DPDK for a CPU family. The conservative default
remains (e.g. nehalem for x86_64), but a user may override it for better
utilization of recent CPU models, e.g. `{ machine = "x86-64-v4"; }` for
AVX512 support.
+8
-3
+8
-3
pkgs/os-specific/linux/dpdk/default.nix
+8
-3
pkgs/os-specific/linux/dpdk/default.nix
···
5
5
, libbsd, numactl, libbpf, zlib, libelf, jansson, openssl, libpcap, rdma-core
6
6
, doxygen, python3, pciutils
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7
, withExamples ? []
8
-
, shared ? false }:
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+
, shared ? false
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+
, machine ? (
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if stdenv.isx86_64 then "nehalem"
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else if stdenv.isAarch64 then "generic"
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else null
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+
)
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+
}:
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let
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mod = kernel != null;
···
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# kni kernel driver is currently not compatble with 5.11
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++ lib.optional (mod && kernel.kernelOlder "5.11") "-Ddisable_drivers=kni"
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++ lib.optional (!shared) "-Ddefault_library=static"
72
-
++ lib.optional stdenv.isx86_64 "-Dmachine=nehalem"
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-
++ lib.optional stdenv.isAarch64 "-Dmachine=generic"
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+
++ lib.optional (machine != null) "-Dmachine=${machine}"
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++ lib.optional mod "-Dkernel_dir=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
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++ lib.optional (withExamples != []) "-Dexamples=${builtins.concatStringsSep "," withExamples}";
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