Questions tagged [multiprocessor]
The multiprocessor tag has no usage guidance.
4
questions
49
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6answers
49k views
How to determine the maximum number to pass to make -j option?
I want to compile as fast as possible. Go figure. And would like to automate the choice of the number following the -j option. How can I programmatically choose that value, e.g. in a shell script?
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55
votes
4answers
133k views
So what are logical cpu cores (as opposed to physical cpu cores)?
I was googling about how I could find the number of CPUs in a machine and I found some posts but I am confused as some mentioned that you get the logical cores vs physical cores etc.
So what is the ...
7
votes
1answer
12k views
What does “cpu MHz” field mean in the /proc/cpuinfo of a hyper-threading cpu?
The CPU is a i7-3770@3.40GHz. It has 4 cores and each core has 2 threads. Here is the dmidecode output:
# dmidecode -t 4
# dmidecode 2.9
SMBIOS 2.7 present.
Handle 0x0042, DMI type 4, 42 bytes
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5
votes
1answer
4k views
Should I disable hyperthreading when concerned about performance of single-threaded applications?
I use a i5-2410M processor, which is setup to do hyperthreading by default on my laptop. Considering that this is a 2-core processor, this means it can do 4 threads at a time. This also means that ...
