Nvidia Visual Profiler错误：无法创建性能分析文件

Question

我是nvprof的新用户，当我尝试使用nvprof来剖析我的代码时出现错误。我在代码中添加了一些OpenACC指令。我使用的cuda工具包是Cuda8.0。我的代码是用fortran90 + OpenMPI编写的。我使用16个核心进行并行计算。下面是我用来提交代码的脚本：

#!/bin/bash -l 
# 
#SBATCH --nodes=1 
#SBATCH --ntasks=16 
#SBATCH --ntasks-per-node=24 
#SBATCH --ntasks-per-core=2 
#SBATCH --cpus-per-task=1 
#SBATCH --constraint=gpu 
#SBATCH --time=24:00:00 
#SBATCH --account=s807 

export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK 
export CRAY_CUDA_MPS=1 
export TMPDIR=/scratch/snx3000/guow/Incompact3d_GPU/test1 
export PGI_ACC_TIME=1 

set -ex 

# set some parameters 
OUT=log.txt 
#WMIN=1400 
NP=16 


# tasks: $SLURM_NTASKS 
# tasks-per-node: $SLURM_NTASKS_PER_NODE 
# cpus-per-task: $SLURM_CPUS_PER_TASK 
srun nvprof -o nvprof.out ./incompact3d $WMIN >> $OUT 

的作业几秒钟后运行结束，我得到了以下错误信息：生成nvprof.out文件

+ OUT=log.txt 
+ NP=16 
+ srun nvprof -o nvprof.out ./incompact3d 
==20144== NVPROF is profiling process 20144, command: ./incompact3d 
==20148== NVPROF is profiling process 20148, command: ./incompact3d 
==20140== NVPROF is profiling process 20140, command: ./incompact3d 
==20133== NVPROF is profiling process 20133, command: ./incompact3d 
==20134== NVPROF is profiling process 20134, command: ./incompact3d 
==20150== NVPROF is profiling process 20150, command: ./incompact3d 
==20146== NVPROF is profiling process 20146, command: ./incompact3d 
==20128== NVPROF is profiling process 20128, command: ./incompact3d 
==20154== NVPROF is profiling process 20154, command: ./incompact3d 
==20156== NVPROF is profiling process 20156, command: ./incompact3d 
==20152== NVPROF is profiling process 20152, command: ./incompact3d 
==20136== NVPROF is profiling process 20136, command: ./incompact3d 
==20130== NVPROF is profiling process 20130, command: ./incompact3d 
==20158== NVPROF is profiling process 20158, command: ./incompact3d 
==20138== NVPROF is profiling process 20138, command: ./incompact3d 
==20142== NVPROF is profiling process 20142, command: ./incompact3d 
==20146== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
==20142== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
==20138== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
==20133== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
==20134== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
==20136== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
==20156== Error: Cannot create profiling file: /scratch/snx3000/guow/Incompact3d_GPU/test2_OpenAcc/nvprof.out 
srun: First task exited 30s ago 
srun: tasks 0,4,6-7,9-13: running 
srun: tasks 1-3,5,8,14-15: exited 
srun: Terminating job step 3892463.0 
slurmstepd: error: *** STEP 3892463.0 ON nid04439 CANCELLED AT 2017-10-12T15:04:00 *** 
srun: Job step aborted: Waiting up to 32 seconds for job step to finish. 
srun: error: nid04439: tasks 0,4,6-7,9-13: Killed 
srun: Terminating job step 3892463.0 

但当我使用命令“nvvp nvprof.out”来检查它时什么都没有显示。你以前遇到过这种情况吗？任何建议将不胜感激！

Answer 1

尝试使用下面的命令：

srun nvprof -o nvprof.%p.out ./incompact3d $WMIN >> $OUT 

“％P”将得到与每个MPI排名的进程ID所以每个级别将输出它的配置文件，不同的文件填写。否则，所有的等级都试图使用可能导致问题的相同文件。