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Questions - benchmarking

c - what is the most efficient way to copying a string?

what is the most efficient way for the cpu (benchmark way) to copy a string? I am new to c and i am currently copying a string like this char a[]="copy me"; char b[sizeof(a)]; fo...
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dn70a

c

string

loops

for-loop

benchmarking

Votes: 0

Answers: 3

Latest Answer

Don't write your own copy loops when you can use a standard function like memcpy (when the length is known) or strcpy (when it isn't). Modern compilers treat these as "builtin" functions, so...
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Peter Cordes

How exactly does JMH do the calculations?Where in the code or in which file can you see the process and formula for calculating "score" and "error"?

How exactly does JMH do the calculations? Where in the code or in which file can you see the process and formula for calculating "score" and "error"? CopyOnWriteBenchmark.testAdd ...
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ТудыСюды

java

java-8

benchmarking

jmh

Votes: 0

Answers: 1

Latest Answer

looking into debugger I see that the code responsible for calculations is generated at compilation time separately for each benchmark. Below there is an example of generated method: public static void...
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Sergey Tsypanov

How can I benchmark or profile an embedded ARM platform emulated?

I'm developing performance sensitive code for an embedded platform. In general, there are multiple ways to test for an embedded platform, and I'm doing so by developing on a full Linux machine, using...
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SRobertJames

performance

assembly

embedded

benchmarking

qemu

Votes: 0

Answers: 0

Same compute intensive function running on two different cores resulting in different latency

#include <pthread.h> #include <fcntl.h> #include <unistd.h> #include <iostream> #include <chrono> using namespace std; static inline void stick_this_thread_to_core(int...
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avernus

c++

performance

pthreads

x86-64

benchmarking

Votes: 0

Answers: 1

Latest Answer

It turns out that cores 0, 16, 17 were running at much higher frequency on my Skylake server.
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avernus

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