mirror of
https://github.com/paboyle/Grid.git
synced 2026-08-29 13:59:36 +01:00
181 lines
9.8 KiB
Bash
181 lines
9.8 KiB
Bash
#!/bin/bash -l
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#SBATCH --job-name=smoother-modes
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#SBATCH --nodes=36
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#SBATCH --ntasks-per-node=8
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#SBATCH --cpus-per-task=7
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#SBATCH --gpus-per-node=8
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#SBATCH --time=1:45:00
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#SBATCH --account=phy157_dwf
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#SBATCH --gpu-bind=none
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#SBATCH --exclusive
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#SBATCH --mem=0
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#SBATCH -S 0
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##############################################################################
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# The 1402.2585 p.13 comparison on this machine: adaptive GCR smoothers vs
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# the same polynomials frozen (GCRReplaySmoother: recorded for the first
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# PolyRecordIters outer steps, then replayed with no inner products), vs a
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# Chebyshev 1/x fit on the measured interval. Same banked point otherwise.
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#
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# M1 gcr / gcr reference
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# M2 replay / replay both levels frozen after PolyRecordIters steps
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# M3 replay / gcr fine frozen only (the fine smoother is the reduction-
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# heavy one at Nrhs=1)
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# M4 cheb / gcr fine Chebyshev [FineChebLo,FineChebHi] order Fso
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# M5 cheb / cheb
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# M6 gcr / replay coarse frozen only
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#
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# Laptop 8^4 findings (hot config, Ls=4, NBASIS=8): replay/replay converges
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# (28 vs 23 outer); cheb on the FINE level diverges there while cheb on the
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# coarse level is fine -- the tiny operator has modes the fixed polynomial
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# amplifies (left of / off the axis) that GCR handles adaptively. Production
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# spectrum is near-normal with edge 130.5 (shift 0.1) so M4/M5 may behave
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# differently; they are cheap to include and cheap to discard.
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#
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# Readouts per mode: Fouter count, s/RHS, and the FINAL exact-halo residual.
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##############################################################################
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cat << EOF > select_gpu
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#!/bin/bash
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export GPU_MAP=(0 1 2 3 7 6 5 4)
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export NUMA_MAP=(3 3 1 1 2 2 0 0)
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export GPU=\${GPU_MAP[\$SLURM_LOCALID]}
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export NUMA=\${NUMA_MAP[\$SLURM_LOCALID]}
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export HIP_VISIBLE_DEVICES=\$GPU
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unset ROCR_VISIBLE_DEVICES
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if [ \$SLURM_PROCID = "0" ]; then echo \$*; fi
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exec numactl -m \$NUMA -N \$NUMA \$*
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EOF
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chmod +x ./select_gpu
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root=$HOME/ParallelIO/systems/Frontier
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source $root/sourceme-rocm7.2.sh
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export OMP_NUM_THREADS=7
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export FI_MR_CACHE_MONITOR=kdreg2 # REQUIRED for device-buffer MPI on Slingshot: libfabric memhooks monitor (default) is defective, see systems/WorkArounds.txt (libfabric #11451)
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export MPICH_GPU_SUPPORT_ENABLED=1
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export MPICH_SMP_SINGLE_COPY_MODE=CMA
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export MPICH_OFI_NIC_POLICY=GPU
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module load libfabric
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unset DENSE_GATHER DENSE_GATHER_FORCE DENSE_GATHER_DEBUG DENSE_GATHER_MIN_BYTES
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OPTS1="--accelerator-threads 8 --shm 4096 --shm-mpi 1 --device-mem 32000"
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vol=48.48.48.96
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MPI_GEOM=3.6.4.4
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# banked point (2026-08-26 sweep): Css 2.0, Nstep 2, Fso 6, mmax 4, svm 8
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export FineSmootherShift=0.1
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export FineSmootherOrder=6
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export FineSmootherMmax=4
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export CoarseSmootherShift=2.0
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export CoarseSmootherNstep=2
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export CoarseSmootherMmax=2
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export CoarseSolverTol=0.05
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export CoarseSolverOrder=200
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export CoarseSolverMmax=8
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export OuterTol=1e-8
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export OuterMmax=6
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export OuterNstep=12
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export SUBSPACE_FILE=/lustre/orion/phy157/proj-shared/phy157_dwf/paboyle/subspace_nb64.scidac
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unset SLAB_FILE
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export DENSE_SCHUR=1
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export DENSE_SCHUR2D=1
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export MASS=0.00078
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export BLOCK=2.2.3.3
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export BLOCK2=4.4.2.4
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export L3_TOL=3.0e-1
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export L3_MAXIT=2
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export L3_NSTEP=50
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export DENSE_CC=1
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export DENSE_APPLY_PROFILE=1
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unset DENSE_CC_CHECK
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export DENSE_SPLITK=128
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export DENSE_DEVICE_SUM=4 # cartesian P2P ring ALLGATHER: ~8x fewer bytes than the padded allreduce (=2); no collectives, no size cliff
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export SUMMA_HANDSHAKE=1 # ring histogram splits each message into 4-byte handshake (partner wait) + transfer
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# SCHUR2D_PROBE: leave unset (probe on by default; =0 disables); probe now also runs 2/3/4 MB
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export GRID_ALLOC_NCACHE_LARGE=64
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export NRHS=4
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export PowerIterations=0
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export SmootherCoeffLog=0
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# frozen-polynomial controls
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export PolyRecordIters=8 # outer steps recorded
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export PolyRecordStart=8 # ...starting here: the early-step polynomials are unrepresentative (M3)
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export PolyRecordSelect=last # replay ONE recorded call's polynomial (PB: every individual call beats the coefficient mean)
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export PolyRefresh=5 # re-record every 5 outer steps: BFM BfmHDCG.C:2243, k%5==1 -> LdopM1MirsPolyRecord, single call, replayed 4 steps
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# Inverse ring-rate hypotheses (2026-08-27): OMP threads and MPI thread level both NIL
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# (schur2d_env.job); the cause was partial ring participation -> SCHUR2D_LEAF_SPAN.
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export PolyVerbose=1 # frozen smoothers print |r_m|/|r_0| per call: separates 'bad polynomial' from 'linear V-cycle stagnates the outer'
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export FineChebLo=3.0 # harvested |R|<0.1 edge / PowerIteration edge x1.05
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export FineChebHi=137.0
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export CoarseChebLo=8.0
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export CoarseChebHi=47.0 # shift 2.0: edge 43.3 x1.08
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# Reference: the banked ADAPTIVE optimum, Fso6 / sm4 / Css2.0 / Nstep2 / svm8 ->
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# 28.57 s (Nrhs=1), ~14.9 s/RHS (Nrhs=4). The stationary smoother converged at
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# the deliberate overshoot (order 12, fine shift 1.0, coarse Nstep 6); the
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# ladder below walks back towards the banked point. A cell wins if it stays
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# convergent AND beats 28.57 s. Each cell ~5 min.
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run_cell () {
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name=$1; export FineSmootherOrder=$2; export FineSmootherShift=$3; export CoarseSmootherNstep=$4
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export FineSmootherMode=$5; export CoarseSmootherMode=$6
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echo "----- $name : Fso=$FineSmootherOrder Fss=$FineSmootherShift Csn=$CoarseSmootherNstep fine=$FineSmootherMode coarse=$CoarseSmootherMode -----"
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fname=log.ladder.$name
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srun -N36 -n288 --kill-on-bad-exit=1 ./select_gpu $root/examples/Example_pvdagm_v2_3level_DenseCoarseMatrix \
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--mpi ${MPI_GEOM} --grid $vol $OPTS1 --comms-overlap > $fname 2>&1
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echo " exit $?"; sleep 60
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echo " $(grep -h 'V2 3-level solve Nrhs' $fname | sed 's/.*V2/V2/' | tr '\n' ' ')"
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echo " $(grep -h 'Fouter MrhsPGCR: Converged' $fname | sed 's/.*Converged/Converged/' | cut -c1-60 | tr '\n' ' ')"
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echo " replay per-call |r|/|r0| (Nrhs=1 solve): $(awk '/THREE-level solve, Nrhs = 1/{s=1} s && /Fsmoother replay \|r\|/{v=$NF; n++; t+=v; if(v>mx)mx=v} END{if(n) printf "mean %.4f max %.4f over %d calls", t/n, mx, n}' $fname)"
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grep -h "SCHUR fp64 distributed invert took\|GB/s/rank\|BIG LEAVES\|ring histogram\|^Grid : Message : [0-9.]* s : >=" $fname | sed 's/^Grid : Message : [0-9.]* s : //' | cut -c1-150 | head -12
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}
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# Ladder 2 (after L0-L3 of the first ladder): the stationary polynomial
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# wants a LARGER shift than the adaptive one -- it must suppress the
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# high-mode deviation on average, not per call. Measured (Csn=2):
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# (12,1.0) 48 outer 31.4 s (8,1.0) 58 outer 30.9 s (8,0.5) 60 outer 34.3 s
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# Reference (adaptive, Fso6/Fss0.1): 56 outer, 28.57 s. So walk the SHIFT UP
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# at orders 8 and 6, trading shift against order. Nrhs=1 is the target.
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# Ladder 2 result (jobs 5353561/5353660/5356490): stationary polynomials floor
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# at ~31 s vs adaptive 28.57 s -- CLOSED. Cells kept for reference:
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# name Fso Fss Csn fine coarse
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#run_cell S1_08_20 8 2.0 2 replay gcr # 57 outer 30.55 s
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#run_cell S2_08_30 8 3.0 2 replay gcr # 60 / 31.29
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#run_cell S3_06_20 6 2.0 2 replay gcr # 69 / 32.74
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#run_cell S4_06_10 6 1.0 2 replay gcr # 78 / 35.74
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#run_cell S5_10_20 10 2.0 2 replay gcr # 53 / 31.13
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#run_cell S6_coarse6 8 2.0 6 replay replay # 61 / 42.53 (intermittent GPU page fault at outer step 22 on one run)
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#run_cell S7_coarse4 8 2.0 4 replay replay # 60 / 84.12
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# SCHUR2D_LEAF_SPAN sweep (2026-08-27). The SUMMA ring histogram put 93% of
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# the inverse's ring time in 3.7 MB single-block panels: the recursion levels
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# below span Pr=18 / Pc=16 run their rings on a few process rows/columns while
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# the rest wait. Big leaves gather each sub-block of <= s blocks to one rank,
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# invert locally (rocSOLVER getrf/getri), scatter back. Readout per cell:
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# "SCHUR fp64 distributed invert took" -- the number that matters (ref 73-148 s)
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# "BIG LEAVES ... inverse (max over ranks)" -- rocSOLVER time at W = s*480 (unmeasured on a GCD)
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# histogram ">= 2.0 MB" row -- should shrink to ~nothing at s>=9; handshake column = partner wait
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# Solver settings are the banked adaptive point (solve time is the same in every cell; only setup changes).
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# name Fso Fss Csn fine coarse
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# Sweep result (job 2026-08-27): span 1 132.5 s | 4 37.0 s | 9 27.6 s | 18 30.6 s; VERIFY 3.3939e-5 in all.
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# Span 9 optimal: above it the SERIAL leaf chain (32 x 0.53 s at W=4320, 16 x 1.84 s at 8640,
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# 287 ranks waiting) dominates; below it the partial rings return.
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#export SCHUR2D_LEAF_SPAN=1; run_cell I1_span01 6 0.1 2 gcr gcr # 132.5 s
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#export SCHUR2D_LEAF_SPAN=9; run_cell I2_span09 6 0.1 2 gcr gcr # 27.6 s
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#export SCHUR2D_LEAF_SPAN=18; run_cell I3_span18 6 0.1 2 gcr gcr # 30.6 s
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#export SCHUR2D_LEAF_SPAN=4; run_cell I4_span04 6 0.1 2 gcr gcr # 37.0 s
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# Leaf inverse: rocSOLVER getri_batched scales n^1.2-1.8 here (overhead bound). SCHUR2D_LEAF_LU=1
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# replaces it with blocked zgetrf_64 + one identity zgetrs_64 (the N=69120 1-rank path).
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# Readout: "BIG LEAVES ... inverse (max over ranks)" vs 0.53 s (span 9) / 1.84 s (span 18);
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# if the leaf gets ~3x cheaper, span 18's clean rings (10.3 GB/s) may win overall.
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export SCHUR2D_LEAF_LU=1
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export SCHUR2D_LEAF_SPAN=9; run_cell I5_span09_LU 6 0.1 2 gcr gcr # vs I2 27.6 s
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export SCHUR2D_LEAF_SPAN=18; run_cell I6_span18_LU 6 0.1 2 gcr gcr # vs I3 30.6 s
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unset SCHUR2D_LEAF_SPAN SCHUR2D_LEAF_LU
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echo "========================================================="
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echo "summary"
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for f in log.ladder.I*; do echo "$f: $(grep -h "SCHUR fp64 distributed invert took" $f | sed "s/.*invert took//" | cut -c1-40) $(grep -h "BIG LEAVES" $f | sed "s/.*leaves,//" | cut -c1-90)"; done
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echo "reference inverse (span 1): 73-148 s run to run; solve 28.57 s Nrhs=1"
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echo "========================================================="
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