Alex Guteniev

Alex Guteniev has asked 26 questions and find answers to 89 problems.

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I'm from Kharkiv, Ukraine

How to help Ukraine army: https://savelife.in.ua/en/donate/

Русский военный корабль иди нахуй!

Alex Guteniev questions

In which cases GetSystemInfo/GetLogicalProcessorInformationEx returns different processor count within the same program run?
Intel JCC Erratum - should JCC really be treated separately?
Does cmpxchg write destination cache line on failure? If not, is it better than xchg for spinlock?
Has Hardware Lock Elision gone forever due to Spectre Mitigation?
How C++ Standard prevents deadlock in spinlock mutex with memory_order_acquire and memory_order_release?
Why do separate arrive and wait exist in C++20 barrier?
How to use Intel TSX with C++ memory model?
Why is std::mutex so much worse than std::shared_mutex in Visual C++?
Why is std::mutex a standard-layout class?

Alex Guteniev answers

MSVC C++ 17 - warning C4121 "alignment of a member was sensitive to packing"
AVX2: Is there a way to implement _mm256_mul_epi8 function for a constant power of 2?
Optimizing a memswap function
Is there a way to have a version of std::atomic's compare_exchange_strong method that exchanges on inequality?
How to safely use callbacks when the bound function could be deleted
How to remove the surrounding rectangle around the current line in Visual Studio?
How is CONDITION_VARIABLE implemented?
std::popcount identifier not found in MSVC 16.6.0
Deduce if a program is going to use threads
How to disable automatic double quotation marks in Visual Studio 2022