Platform:All PlatformsVersions:All versions
- Comsol Multiphysics Femlab
- Comsol Multiphysics Mac
- Comsol Multiphysics Tutorial Pdf
- Comsol Multiphysics Mac Os
The system requirements for the license manager are the same as for COMSOL Multiphysics ®. FlexNet ® version 11.13.1.4 is used on Windows ® and version 11.13.1.3 on Linux ® and Mac OS X. The version of lmgrd must be the same or higher than the FlexNet ® version used by COMSOL. FlexNet ® License Manager on Linux ®. Watch this demonstration on how to install COMSOL Multiphysics® software on a Mac with a Computer-Locked license file or a trial passcode. After following the steps in this video, you will be ready to run COMSOL Multiphysics® on your Mac.
Problem Description
Mac finderbar download. This solution describes how COMSOL takes advantage of multicore computers.
![Multiphysics Multiphysics](https://pic.macw.com/pic/202006/08163208_344c8c7cd1.png)
Solution
COMSOL supports two mutual modes of parallel operation: shared-memory parallelism and distributed-memory parallelism (cluster support). Shared-memory parallelism is supported with all COMSOL license types, while distributed-memory parallelism requires a floating network license. Using shared-memory parallelism is possible to utilize all CPU sockets on a computer, but for computers with multiple sockets, it can sometimes be advantageous with a floating network license to utilize the computer's full capacity; for further information, please see Hybrid Computing: Advantages of Shared and Distributed Memory Combined. This solution is dedicated to shared-memory parallel operations. For distributed-memory parallel operations, see Solution 1001.
Shared-memory processing, or multithreading is important for the performance of COMSOL computations. Some terms that are frequently used in when describing multithreading are
- Core: A physical processor core used in shared-memory parallelism by a computational node with multiple processors.
- Speedup: is how many times faster a job runs on N cores compared to 1 core, on a specific compute node. The speedup depends both on the problem type, the hardware used, and hardware drivers used.
Windows
On Windows platforms, the default number of processor cores used by COMSOL is the total number of available physical cores. For example, if you have a 2 x dual core machine, 4 cores will be used in parallel by a COMSOL Multiphysics process by default.
If you want COMSOL to leave out one or more processor cores you can manually set the number of cores used for a job, you can change the default behavior by starting the COMSOL Desktop and setting the Number of processors option on the Multicore and Cluster Computing section in the Preferences menu.
Alternatively, create a new shortcut on your Desktop to the COMSOL executable and modify it to set the desired number of threads.
- Create a new shortcut on the Desktop.
- Right-click the shortcut and select Properties.
- Change the Target field to
'C:Program FilesCOMSOLCOMSOL55Multiphysicsbinwin64comsol.exe' -np 2
if you want COMSOL to use only 2 cores.
Mac OS X
On Mac OS X, controlling the number of processor cores used by COMSOL is only possible when launching COMSOL from the Terminal. Motogp 3 game full version torrent. The default behavior is to use all available physical processor cores for the COMSOL Multiphysics application. You can find how many processor cores you have in the System Profiler application, or by using the command sysctl hw.ncpu. You can override the default behavior by using the command line switches. For example, start by the command
/Applications/COMSOL55/Multiphysics/bin/comsol -np 2.
/Applications/COMSOL55/Multiphysics/bin/comsol -np 2.
Linux
The number of cores available to a COMSOL process in parallel can be displayed on some systems by the command
more /proc/cpuinfo | grep proc
more /proc/cpuinfo | grep proc
Note that if you have hyperthreading activated you need to divide the cores count reported by the above command by relevant hyperthreading factor (2) to get the physical core count. COMSOL does not benefit from hyperthreading; if COMSOL is started with more threads than there are physical CPU cores, performance will decrease.
On Linux the default behavior is to use all available physical cores for the COMSOL Multiphysics application. You can override the default behavior by using the command line switches. For example, start by the command comsol -np 2.
Hyperthreading
COMSOL does currently not benefit from hyperthreading. COMSOL will use only as many threads as there are physical CPU cores on the system. The result is that if hyperthreading is active, the Windows Task Manager will show at most 50% CPU utilization for the COMSOL process. This is expected and not an indication that CPU utilization is too low. It is recommended to have hyperthreading enabled such that other applications running simultaneously can take advantage of it.
The -mpmode option
The values 'turnaround' and 'throughput' for -mpmode correlate directly with the OpenMP runtime settings for the KMPLIBRARY environment variable. The -mpmode option overwrites the system settings (if KMPLIBRARY is not set). For more information on the turnaround and throughput modes, please see the section on 'Execution modes' on https://software.intel.com/en-us/node/522689.
All options use KMP_BLOCKTIME = 200 by default. turnaround is also the default, when -mpmode is not set at all. The 'serial' mode is not used by COMSOL. The third value that COMSOL lists for -mpmode is 'owner'. The owner option is similar to turnaround, the difference is that owner also specifies a thread affinity that is optimized for the number of sockets on the computer, so owner is more aggressive than turnaround.
All options use KMP_BLOCKTIME = 200 by default. turnaround is also the default, when -mpmode is not set at all. The 'serial' mode is not used by COMSOL. The third value that COMSOL lists for -mpmode is 'owner'. The owner option is similar to turnaround, the difference is that owner also specifies a thread affinity that is optimized for the number of sockets on the computer, so owner is more aggressive than turnaround.
NUMA awareness
COMSOL is aware of NUMA (Non-Uniform Memory Access) systems. NUMA systems can be systems with several CPU sockets or systems with CPUs based on multiple tiles. These systems are characterized by RAM memory modules that can be reached with different access times. COMSOL is automatically detecting the number of available sockets. Manual changes can be applied by specifying the Number of sockets in Preferences / Multicore and Cluster Computing. From the command line, the number of NUMA sets (sockets) can be set by means of the flag -numasets If you are using the MUMPS direct solver, switch to the PARDISO direct solver in COMSOL. It provides better shared-memory speedup for hight number of cores than MUMPS. By default, the Intel MKL library is used. For AMD processors with Linux you could also try the BLIS library by specifying -blas blis.
Import (10)
Installation (39)
Geometry (13)
Physics (10)
Solver (33)
Mesh (14)
General (22)
Structural Mechanics (3)
Fluid Dynamics (1)
ALE / Parameterized Geometry (1)
Postprocessing (4)
Export (1)
Product Information (2)
Drawing (1)
Multiphysics (1)
User Models (1)
Import (10)
Installation (39)
Geometry (13)
Physics (10)
Solver (33)
Mesh (14)
General (22)
Structural Mechanics (3)
Fluid Dynamics (1)
ALE / Parameterized Geometry (1)
Postprocessing (4)
Export (1)
Product Information (2)
Drawing (1)
Multiphysics (1)
User Models (1)
See Also
See also Selecting hardware (solution 866).
See also Running COMSOL on clusters (solution 1001).
Browse by Category
Error Messages (63)Import (10)
Installation (39)
Geometry (13)
Physics (10)
Solver (33)
Mesh (14)
General (22)
Structural Mechanics (3)
Fluid Dynamics (1)
ALE / Parameterized Geometry (1)
Postprocessing (4)
Export (1)
Product Information (2)
Drawing (1)
Multiphysics (1)
User Models (1)
COMSOL makes every reasonable effort to verify the information you view on this page. Resources and documents are provided for your information only, and COMSOL makes no explicit or implied claims to their validity. COMSOL does not assume any legal liability for the accuracy of the data disclosed. Any trademarks referenced in this document are the property of their respective owners. Consult your product manuals for complete trademark details.
Platform:MacintoshVersions:5.5
Problem Description
After upgrading to macOS 11, COMSOL Multiphysics 5.5 fails to launch.
Solution
Make sure you are running COMSOL Multiphysics 5.5 Update 3.
From the COMSOL Multiphysics installation directory, go to the directory called
uninstall
. In that directory, locate the file fl.ver
. Right-click on the file and select Open With > Text Edit.If the line
ver.build
says 359, you have Update 3 installed. Alesis hd24 and fst connect for mac. In that case, proceed to the section called Installing the patch for macOS 11Update your COMSOL Multiphysics installation.
To update your COMSOL Multiphysics installation, run the app COMSOL Update from your COMSOL Multiphysics installation directory.
Then, verify that your COMSOL Multiphysics installation is up to date as per the instructions above.
Comsol Multiphysics Femlab
Installing the patch for macOS 11
If you have a COMSOL Multiphysics installation without COMSOL Compiler, please go here
If you have a COMSOL Multiphysics installation with COMSOL Compiler, please go here
Installing the patch for COMSOL Multiphysics without COMSOL Compiler.
Download the file
comsol55_hotfix_for_big_sur.dat
below.Run the app COMSOL Update from your COMSOL Multiphysics installation directory.
On the first page, select Manual download and point to the downloaded DAT file by clicking Browse. Click Next and continue with the installation.
Installing the patch for COMSOL Multiphysics with COMSOL Compiler.
Note: please follow the instructions below exactly. Do not attempt to copy the folders in the ZIP archive to the installation as that might lead to a invalid installation.
- Right-click on
comsol55_hotfix_for_big_sur.zip
(see the link below) and select Download Linked File. - Launch the Terminal Application.
- Connect to your installation directory, for example, /Applications/COMSOL55/Multiphysics:
cd /Applications/COMSOL55/Multiphysics
- Extract the downloaded file:
unzip {download path}/comsol55_hotfix_for_big_sur.zip
In response to the prompt to Replace files, typeA
and press return. (If you do not get a prompt about replacing files, it is likely that you connected to the wrong directory.)
Related Files
Comsol Multiphysics Mac
comsol55_hotfix_for_big_sur.dat | 74.5 MB |
comsol55_hotfix_for_big_sur.zip | 87.0 MB |
Comsol Multiphysics Tutorial Pdf
Browse by Category
Error Messages (63)Import (10)
Installation (39)
Geometry (13)
Physics (10)
Solver (33)
Mesh (14)
General (22)
Structural Mechanics (3)
Fluid Dynamics (1)
ALE / Parameterized Geometry (1)
Postprocessing (4)
Export (1)
Product Information (2)
Drawing (1)
Multiphysics (1)
User Models (1)
Comsol Multiphysics Mac Os
COMSOL makes every reasonable effort to verify the information you view on this page. Resources and documents are provided for your information only, and COMSOL makes no explicit or implied claims to their validity. COMSOL does not assume any legal liability for the accuracy of the data disclosed. Any trademarks referenced in this document are the property of their respective owners. Consult your product manuals for complete trademark details.