Linked Questions

Trying to optimize concurrent linked lists access, I tried to benchmark the average time that dereferencing takes in x86_64 (my specific processor is a Ryzen). While I knew that the nice old days of ...

When I test the cycle number of the module, the results of each test are quite different？ 1781344-->First test 1264558-->Second test 1388058-->Third test I use __rdtsc() to record cycles，...

I'm following this whitepaper by intel to benchmark code execution. It uses cpuid to fence the reads of the timestamp registers, which seems to work alright. I'm more interested in the commands ...

"I want to write a program that consumes 5 seconds of CPU time, where the time spent off the CPU due to IO, context switches, etc., is not counted towards this 5-second time quota. Currently, I'...

I spent many time to measure exact clock cycles of given instructions, a portion of code written in C. However, I never could measure exactly how many cycles will take during the runtime, I used PAPI, ...

I'm interested in how Invariant TSC behaves on a multi-core CPU, on a classic PC with a single physical CPU. The only thing I could find is that its frequency is constant and the same for all CPU ...

I'm designing a benchmark for a critical system operation. Ideally the benchmark can be used to detect performance regressions. I'm debating between using the total time for a large workload passed ...

I need to add two memory fences into my codes, in order to prevent my codes from being reordered by either the compiler or CPU. Like this: rec.time_stamp0 = std::system_clock::now(); std::...

I am currently working on an assembly function that sets a buffer to zero. I am measuring the clock cycles it takes to execute the function. However, I have encountered an issue where the number of ...

I'm measuring the latency of a store instruction on an x86-64 processor and would like to understand the nuances of timing this instruction. Here’s my setup and the specific questions I have: Setup: I ...

Recently, I have been trying to run some performance anlaysis on my program. I want to measure the latency of some functions in cpu ticks and later convert the delta to nanosecond. (I intentionally am ...