114 lines
3.7 KiB
Nix
114 lines
3.7 KiB
Nix
######################################################################################
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# Saiph, scalability experiment:
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#
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# App:Heat 3D - garlic/tampi+isend+oss+task+simd branch
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# App details:
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# 3D mesh of ~400*400*400 points
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# nbgx = global blocks in the X dimension
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# nbgy = global blocks in the Y dimension
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# nbgz = global blocks in the Z dimension
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# --> nbgx*nbgy*nbgz = global distributed blocks
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# nbly = local blocks in the Y dimension
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# nblz = local blocks in the Z dimension
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# --> nbly*nblz = local blocks (#tasks)
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#
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# Scalability experiment configuration:
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# From a single-core granularity experiment, use a suited local blocking set:
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# --> nbly*nblz >= 48 (at least 3tasks/proc)
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# MPI binded to sockets: MPI procs = 2*nodes
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# Mesh distributed across third dimension to ensure contiguous communications
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# --> nbgx = 1, nbgy = 1
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# Global distribution limited by global mesh size
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# First dimension cannot be locally blocked (simd reasons)
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# Second and third dimension local blocking limited by local mesh size
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#
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######################################################################################
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# Common packages, tools and options
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{
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stdenv
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, stdexp
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, bsc
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, targetMachine
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, stages
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}:
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with stdenv.lib;
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let
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#*** Variable configurations ***
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varConf = with bsc; {
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# Local blocks per dimension
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nbl1 = [ 1 2 3 4 6 12 24 48 96 ];
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nbl2 = [ 1 2 3 4 6 12 24 48 96 ];
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# Number of nodes
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nodes = [ 1 2 4 8 ];
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};
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#*** Generate the complete configuration for each unit ***
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genConf = with bsc; c: targetMachine.config // rec {
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# Experiment, units and job names
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expName = "saiph-scalability";
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unitName = "${expName}-N${toString nodes}" + "nbg_${toString nbgx}-${toString nbgy}-${toString nbgz}" + "nbl_1-${toString nbly}-${toString nblz}";
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jobName = "${unitName}";
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# saiph options
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nodes = c.nodes; # takes values from varConf
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enableManualDist = true; # allows to manually set nbg{x-y-z}
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nbgx = 1;
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nbgy = 1;
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nbgz = nodes*2; # forcing distribution by last dim
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nblx = 1; # simd reasons
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nbly = c.nbl1; # takes values from varConf
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nblz = c.nbl2; # takes values from varConf
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mpi = impi;
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gitBranch = "garlic/tampi+isend+oss+task+simd";
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gitCommit = "8052494d7dc62bef95ebaca9938e82fb029686f6"; # fix a specific commit
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rev = "0";
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# Repeat the execution of each unit 30 times
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loops = 30;
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# Resources
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inherit (targetMachine.config) hw;
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qos = "bsc_cs";
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ntasksPerNode = hw.socketsPerNode; # MPI binded to sockets
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cpusPerTask = hw.cpusPerSocket; # Using the 24 CPUs of each socket
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};
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#*** Compute the final set of configurations ***
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# Compute the array of configurations: cartesian product of all factors
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allConfigs = stdexp.buildConfigs {
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inherit varConf genConf;
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};
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# Filter to remove non-desired configurations:
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# --> tasks/proc < 3
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# --> nblz > 25
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configs = filter (el: if ((builtins.mul el.nbly el.nblz) < (builtins.mul 3 el.cpusPerTask) || el.nblz > 25) then false else true) allConfigs;
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#*** Sets the env/argv of the program ***
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exec = {nextStage, conf, ...}: with conf; stages.exec {
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inherit nextStage;
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env = ''
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export OMP_NUM_THREADS=${toString hw.cpusPerSocket}
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'';
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};
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#*** Configure the program according to the app ***
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program = {nextStage, conf, ...}:
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let
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customPkgs = stdexp.replaceMpi conf.mpi;
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in
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customPkgs.apps.saiph.override {
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inherit (conf) enableManualDist nbgx nbgy nbgz nblx nbly nblz mpi gitBranch gitCommit;
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};
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#*** Add stages to the pipeline ***
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pipeline = stdexp.stdPipeline ++ [ exec program ];
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in
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stdexp.genExperiment { inherit configs pipeline; }
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