Parallel processing is not able to use all my cores
I have the same problem.
The SuperMicro MBD-H12DSI-N6-B motherboard has 2 x 48-core AMD EPYC 7K62 processors.
But MATLAB (R2024a) sees only one of them and opens a pool with 48 workers.
When multiplying and inverting matrices, the dual-processor system load is 50…65%.
The operating system is Microsoft Windows 10 Pro for Workstations 22H2.
The maxNumCompThreads command produces the following result:
>> N = maxNumCompThreads
N =
48
An attempt to set the maximum number of workers to 96 succeeds:
>> LASTN = maxNumCompThreads(96)
LASTN =
48
>> N = maxNumCompThreads
N =
96
But after that, a pool is opened with 48 workers as well:
>> parpool
Starting parallel pool (parpool) using the ‘Processes’ profile …
Connected to parallel pool with 48 workers.
ans =
ProcessPool with properties:
Connected: true
NumWorkers: 48
However, I did not find in the settings where I can set the maximum number of workers.
The feature(‘numcores’) command produces the following result:
>> feature(‘numcores’)
MATLAB detected: 96 physical cores.
MATLAB detected: 96 logical cores.
MATLAB was assigned: 48 logical cores by the OS.
MATLAB is using: 48 logical cores.
MATLAB is not using all logical cores because Operating System restricted the number of cores to: 48.
ans =
48
That is, MATLAB complains about the Windows operating system
What to do?
Is it possible to run all 96 cores?I have the same problem.
The SuperMicro MBD-H12DSI-N6-B motherboard has 2 x 48-core AMD EPYC 7K62 processors.
But MATLAB (R2024a) sees only one of them and opens a pool with 48 workers.
When multiplying and inverting matrices, the dual-processor system load is 50…65%.
The operating system is Microsoft Windows 10 Pro for Workstations 22H2.
The maxNumCompThreads command produces the following result:
>> N = maxNumCompThreads
N =
48
An attempt to set the maximum number of workers to 96 succeeds:
>> LASTN = maxNumCompThreads(96)
LASTN =
48
>> N = maxNumCompThreads
N =
96
But after that, a pool is opened with 48 workers as well:
>> parpool
Starting parallel pool (parpool) using the ‘Processes’ profile …
Connected to parallel pool with 48 workers.
ans =
ProcessPool with properties:
Connected: true
NumWorkers: 48
However, I did not find in the settings where I can set the maximum number of workers.
The feature(‘numcores’) command produces the following result:
>> feature(‘numcores’)
MATLAB detected: 96 physical cores.
MATLAB detected: 96 logical cores.
MATLAB was assigned: 48 logical cores by the OS.
MATLAB is using: 48 logical cores.
MATLAB is not using all logical cores because Operating System restricted the number of cores to: 48.
ans =
48
That is, MATLAB complains about the Windows operating system
What to do?
Is it possible to run all 96 cores? I have the same problem.
The SuperMicro MBD-H12DSI-N6-B motherboard has 2 x 48-core AMD EPYC 7K62 processors.
But MATLAB (R2024a) sees only one of them and opens a pool with 48 workers.
When multiplying and inverting matrices, the dual-processor system load is 50…65%.
The operating system is Microsoft Windows 10 Pro for Workstations 22H2.
The maxNumCompThreads command produces the following result:
>> N = maxNumCompThreads
N =
48
An attempt to set the maximum number of workers to 96 succeeds:
>> LASTN = maxNumCompThreads(96)
LASTN =
48
>> N = maxNumCompThreads
N =
96
But after that, a pool is opened with 48 workers as well:
>> parpool
Starting parallel pool (parpool) using the ‘Processes’ profile …
Connected to parallel pool with 48 workers.
ans =
ProcessPool with properties:
Connected: true
NumWorkers: 48
However, I did not find in the settings where I can set the maximum number of workers.
The feature(‘numcores’) command produces the following result:
>> feature(‘numcores’)
MATLAB detected: 96 physical cores.
MATLAB detected: 96 logical cores.
MATLAB was assigned: 48 logical cores by the OS.
MATLAB is using: 48 logical cores.
MATLAB is not using all logical cores because Operating System restricted the number of cores to: 48.
ans =
48
That is, MATLAB complains about the Windows operating system
What to do?
Is it possible to run all 96 cores? parallel processing MATLAB Answers — New Questions
