HPCG¶
简介¶
HPCG(High Performance Conjugate Gradient)基准测试程序作为超级计算机系统的性能评估指标之一，可有效评估超算系统在下述基本操作中的性能表现：
Sparse matrix-vector multiplication
Vector updates
Global dot products
Local symmetric Gauss-Seidel smoother
Sparse triangular solve (as part of the Gauss-Seidel smoother)
Driven by multigrid preconditioned conjugate gradient algorithm that exercises the key kernels on a nested set of coarse grids
导入HPCG环境¶
版本 |
平台 |
构建方式 |
模块名 |
|---|---|---|---|
3.1 |
|
spack |
oneapi/2021.4.0 思源一号 |
3.1 |
|
spack |
oneapi/2021.4.0 π2.0 |
mkdir ~/HPCG && cd ~/HPCG
module load oneapi/2021.4.0
cp -r $MKLROOT/benchmarks/hpcg ./
cd hpcg
HPCG运行的重要参数¶
problem_size和run_time_in_seconds在hpcg/bin/hpcg.dat中的默认值为192,60，这两个参数均可在运行脚本中指定。
在思源一号上运行¶
HPCG运行脚本 (每个计算节点上共有两个CPU Socket，每个CPU Socket启动1个进程，每个计算节点启动2个进程)
#!/bin/bash
#SBATCH --job-name=2nodes_hpcg
#SBATCH --partition=64c512g
#SBATCH -n 4
#SBATCH --ntasks-per-node=2
#SBATCH --cpus-per-task=32
#SBATCH --exclusive
#SBATCH --output=%j.out
#SBATCH --error=%j.err
module load oneapi/2021.4.0
export OMP_NUM_THREADS=32
export KMP_AFFINITY=granularity=fine,compact,1,0
export problem_size=192
export run_time_in_seconds=60
mpiexec.hydra -genvall bin/xhpcg_avx -n$problem_size -t$run_time_in_seconds
使用如下命令提交作业
sbatch run_hyper.slurm
运行结束后，将产生如下文件，n192-4p-32t_V3.1_2022-02-09_16-43-22.txt，其中192代表问题规模，4代表使用的进程，32代表1个进程包含的线程数。
Final Summary =
Final Summary ::HPCG result is VALID with a GFLOP/s rating of=109.132
Final Summary :: HPCG 2.4 Rating (for historical value) is=109.691
Final Summary ::Reference version of ComputeDotProduct used=Performance results are most likely suboptimal
Final Summary ::Results are valid but execution time (sec) is=65.1121
Final Summary :: Official results execution time (sec) must be at least=1800
在π2.0上运行¶
HPCG运行脚本 (每个计算节点上共有两个CPU Socket，每个CPU Socket启动1个进程，每个计算节点启动2个进程)
#!/bin/bash
#SBATCH --job-name=2nodes_hpcg
#SBATCH --partition=cpu
#SBATCH -n 4
#SBATCH --ntasks-per-node=2
#SBATCH --cpus-per-task=20
#SBATCH --exclusive
#SBATCH --output=%j.out
#SBATCH --error=%j.err
module load oneapi/2021.4.0
export OMP_NUM_THREADS=20
export KMP_AFFINITY=granularity=fine,compact,1,0
export problem_size=192
export run_time_in_seconds=60
mpiexec.hydra -genvall bin/xhpcg_avx -n$problem_size -t$run_time_in_seconds
使用如下命令提交作业
sbatch run_hyper.slurm
运行结束后，将产生如下文件，n192-4p-20t_V3.1_2022-02-26_16-34-36.txt，其中192代表问题规模，4代表使用的进程，32>代表1个进程包含的线程数。
Final Summary =
Final Summary ::HPCG result is VALID with a GFLOP/s rating of=74.4941
Final Summary :: HPCG 2.4 Rating (for historical value) is=74.829
Final Summary ::Reference version of ComputeDotProduct used=Performance results are most likely suboptimal
Final Summary ::Results are valid but execution time (sec) is=62.6445
Final Summary :: Official results execution time (sec) must be at least=1800
运行结果¶
思源一号¶
problem_size:192 run_time_in_seconds:60 |
||
|---|---|---|
核数 |
64 |
128 |
GFOLP/s |
56.09485 |
112.07949 |
π2.0¶
problem_size:192 run_time_in_seconds:60 |
||
|---|---|---|
核数 |
40 |
80 |
GFOLP/s |
37.9614 |
74.4941 |