Running and Verification

Procedure

Use PuTTY to log in to the server as the root user.
Run the following command to go to the RUNS directory:
```
cd /path/to/BIFROST/Bifrost_bench_v1.1.1/RUNS
```
Run the following command to create a hostfile file:
1. Create hostfile.
```
vi hostfile
```
2. Press i to enter the insert mode and add the following content:
```
node1
node2
```
  In the preceding command, node1 and node2 are the host names of the test servers. Change them based on the site requirements.
3. Press Esc, type :wq!, and press Enter to save the file and exit.
Open another login window and use PuTTY to log in to node 2 as the root user.
On node 2, run the following command to configure environment variables:
1. Open .bashrc.
```
vi /root/.bashrc
```
2. Press i to enter the insert mode, and add the following content to the end of the .bashrc file:
```
export PATH=/path/to/GNU/bin:/path/to/OPENMPI/bin:$PATH
export LD_LIBRARY_PATH=/path/to/GNU/lib64:/path/to/OPENMPI/lib:$LD_LIBRARY_PATH
```
3. Press Esc, type :wq!, and press Enter to save the file and exit.

On node 1, run the following command to start the Bifrost program:

mpirun --allow-run-as-root -np 192 -N 96 -hostfile hostfile photo_tr.x 2>&1 | tee -a Bifrost.out

**Table 1** Parameters
Parameter	Description
-np	Total number of processes in use
-N	Number of processes running on each server
-hostfile	Host name of the node in use

If the information shown in Figure 1 is displayed at the end of the generated log file Bifrost.out after 500 iterations, the Bifrost program is running properly.

Figure 1 Result example

Check the value of Mz/s (unit: Mz/s) in the Bifrost.out log. A greater value indicates better performance.

Figure 2 shows the command output.

Figure 2 Result example

Parent topic: Bifrost V1.1.1 Porting Guide (CentOS 7.6)