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49 views

setting affinity for multiple cores on dual cpu system

We are using some systems with 2cpu's with 6 cores/12 threads each so 24 threads in total, for quite a lot of multitread simulations. Because the problem doesnt scale perfectly, i usualy run 4 ...
1
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0answers
93 views

How can I set CPU affinity for a device driver in Windows 7?

Does anybody know how to set on which core a device driver will run and process its interrupt requests? Situation: I'm having iusb3hcs.sys and acpi.sys causing lags when my soundcard processes ...
2
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1answer
137 views

How do I use linux processor affinity to dedicate 2 cores to user1 and 2 cores to user2?

at first I wanted to dedicate 2 cores(4 threads) to one java PID, and 2 cores(4 threads) to the other. However the volatility of these programs makes me think that they will end up crashing and ...
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1answer
271 views

Automatically distributing applications' CPU usage between cores (Windows 8)

I have an Athlon 8 core CPU (4 h/w, 8 logical) and I find that it rarely goes above 12.5% usage. I read this article which explains why, and that there are two solutions: Set processor affinity for ...
1
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0answers
79 views

How does Windows affinity work with hyperthreaded CPUs?

Let me describe our requirement in detail. We are doing some kind of assignment which requires capturing of IP data through NIC card and then processing the captured data in real time. The processing ...
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0answers
7 views

DarkEngine processor affinity bug

Does anybody know what was happening in DarkEngine at multiprocessor systems? The problem was: Application run, but crashed if it had more than one processor affinity. Why was it happening?
1
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0answers
97 views

Can QEMU be used on Mac OS X to emulate a one-core CPU (preferably only the CPU)?

Can QEMU do this kind of emulation? On Macs there's no an easy way to set CPU affinity, so this could an interesting workaround for the older programs that don't work well in multi-core environments.
2
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2answers
846 views

Set default processor affinity for all applications

I'm trying to improve CPU performance in a game, to do this I want to try giving it 2-4 CPU cores that run ONLY that application, and no windows related services. Is there I was where I can set the ...
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0answers
82 views

How to restrict windows service to X cores?

I'm currently trying ot figure out a decent/nice way of determening what core(s) a single service should run on, in Windows Server 2008. I'm aware that for procceses there is two ways to do it: set ...
1
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0answers
151 views

On windows 7 - Set core Affinity on boot, Or bulk affinity/tasking tool? (Like a KsysGuard for windows)

Not even sure if its possible but: you know how you can set custom scheduling in Linux. → and sure, I can set affinity for Windows 7 Programs one @ a time. But do you know of a tool that would allow ...
5
votes
2answers
647 views

Which logical CPU (core) belongs to which socket?

I need to test performance of a multithreaded program on 1 CPU, but I have a dual CPU machine. I need to set affinity to those logical CPU's, that share their socket, oterwise they strongly benefit ...
1
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0answers
186 views

How to set affinity on multi-socket system (2 CPUs)

I have a machine with two six-core processors (hyper-threading turned off). I understand how to set the affinity for a program using the command line when there is only one processor, but how do you ...
0
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1answer
195 views

Setting process affinity in Linux

In Windows, it is possible to make a program run on any number of cores in a multicore processor. It can be set in the Task Manager GUI. Likewise, Is it possible to set the process affinity in Linux, ...
3
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2answers
941 views

Where does Windows store CPU affinity settings?

I’m experiencing a strange issue in Windows XP. On bootup, any processes spawned by the system (services, autorun programs, etc.) are set to use both of the CPU’s threads. Explorer however, and any ...
4
votes
2answers
2k views

How can I automatically adjust the affinity of a process after it is started?

I want to open some programs in the startup without affecting the performance and I want to create shortcuts to them on my startup folder. If I can do this with adding modifiers at the end of the ...
2
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3answers
5k views

How can I set the default affinity for any process in Windows?

I want to run some benchmarks on Windows 7. These benchmarks have to do with hyper-threading on a multi-core CPU. For this, I want to ensure that only the benchmarks are running on their own logical ...
15
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3answers
5k views

How does Windows processor affinity work with hyperthreaded CPUs?

How does Windows processor affinity work with hyperthreaded CPUs? Let's use an example (pictured) of a system with four cores, each with a hyper-threaded virtual core. Which cores correspond to each ...
2
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1answer
3k views

Running a virtual machine on a dedicated processor or core

Our base system runs on Linux but unfortunately the UI has to be on Windows. Its a long story. But thats the requirement. So our idea was to run Windows in a virtual machine using VirtualBox or Xen. ...
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1answer
2k views

“execvp: no such file or directory” when attempting taskset on a running process

I have a process, PID 7150. I want to assign the process to core #4 of my system. (Core numbering starts with zero, so the fourth core should be core #3) I know I can do this by using Taskset. ...
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4answers
9k views

What is Windows Priority and Affinity and what advatanges does it provide?

What exactly is Priority and Affinity (found within Task Manager) and what are they used for: In what situations should/could they be used and what advantages are found while customizing these ...
0
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1answer
76 views

Is it possible to set a more generic process affinity (automatically)?

I know with start /affinity X where X is a hex-number bit-masking the CPUs to be used a process can be started to use certain CPUs only. However, is there a possibility to state something like "start ...
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4answers
10k views

How to set processor affinity on OS X?

How do you set processor affinity in Snow Leopard on a MacBook Pro?I know in Windows you could just switch it in Task Manager.
5
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3answers
2k views

How to set CPU affinity in Wine or CrossOver?

There are some old games who don't like the multicore processors in today's computers. I am wondering if there is a way to set the CPU affinity for them to '1' under Wine or CrossOver? i.e. In a ...