Recent questions tagged CPU

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cpu - How are shifts implemented on the hardware level?

How are bit shifts implemented at the hardware level when the number to shift by is unknown? I can't imagine ... or is there some clever trick? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - What does "extend immediate to 32 bits" mean in MIPS?

I'm reading about the Instruction Decode (ID) phase in the MIPS datapath, and I've got the following quote: " ... from 26 to 32 bits. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - Address translation with multiple pagesize-specific TLBs

For Intel 64 and IA-32 processors, for both data and code independently, there may be both a 4KB ... reference to a current microarchetucture? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - Regarding instruction ordering in executions of cache-miss loads before cache-hit stores on x86

Given the small program shown below (handcrafted to look the same from a sequential consistency / TSO perspective), ... for the loads? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - Relation between endianness and stack-growth direction

Is there a relation between endianness of a processor and the direction of stack growth? For example, x86 ... reason? Thanks in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu - What has a better performance: multiplication or division?

Which version is faster ? x * 0.5 or x / 2 Ive had a course at the university called computer systems ... answer because of the great link. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - Why is LOCK a full barrier on x86?

Why does the LOCK prefix cause a full barrier on x86? (And thus it drains the store buffer and has ... is there some other limitation? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu - Python multiprocessing.cpu_count() returns '1' on 4-core Nvidia Jetson TK1

Can anyone tell me why Python's multiprocessing.cpu_count() function would return 1 when called on a Jetson TK1 ... one of the list elements. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu usage - Accurately Calculating CPU Utilization in Linux using /proc/stat

There are a number of posts and references on how to get CPU Utilization using statistics in /proc/stat. However, most ... ); } return(0); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu speed - How can I programmatically find the CPU frequency with C

I'm trying to find out if there is anyway to get an idea of the CPU frequency of the system my C code is ... have an idea use standard C code? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu - c# Environment.ProcessorCount does not always return the full number of Logical Processor, why?

On my machine, windows 7 - Enterprise with 1 x Intel Xeon E5-1660 0 @ 3.30Ghz (6 cores/cpu ... configuration were inducing windows in error. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - Why are C++ int and long types both 4 bytes?

Many sources, including Microsoft, reference both the int and long type as being 4 bytes and having a range of ( ... a larger range of values? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu usage - Visual Studio 2013 Update 2 maxes out core

I recently installed Visual Studio 2013 Professional Update 2 on a Windows 7 virtual machine. I had been running ... trace more often than not: See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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552 views

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cpu architecture - Write-back vs Write-Through caching?

My understanding is that the main difference between the two methods is that in "write-through" method data is ... benefit of "write-through"? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu architecture - How does 32-bit address 4GB if 2³² bits = 4 Billion bits not Bytes?

Essentially, how does 4Gb turn into 4GB? If the memory is addressing Bytes, should not the possibilities be 2(32/8)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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459 views

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cpu - Out-of-order instruction execution: is commit order preserved?

On the one hand, Wikipedia writes about the steps of the out-of-order execution: Instruction fetch. Instruction ... light on this discrepancy? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu - Difference between core and processor

What is the difference between a core and a processor? I've already looked for it on Google, but I only get ... not what I am looking for. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cpu - How instructions are differentiated from data?

While reading ARM core document, I got this doubt. How does the CPU differentiate the read data from data bus ... for enlightening me! /MS See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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