Margaret Bloom

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Margaret Bloom has asked 21 questions and find answers to 157 problems.

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Margaret Bloom questions

How do *move elimination* slots work in Intel CPU?
Why is this specpoline not working on Kaby lake?
What are the microarchitectural details behind MSBDS (Fallout)?
How does the indexing of the Ice Lake's 48KiB L1 data cache work?
What does the PCOMMIT instruction do?
Can the LSD issue uOPs from the next iteration of the detected loop?
Can the A20 line still be masked off on Haswell and successors?
Why flush the pipeline for Memory Order Violation caused by other logical processors?
How are MMIO, IO and PCI configuration request routed and handled by the OS in a NUMA system?
Understanding the impact of lfence on a loop with two long dependency chains, for increasing lengths

Margaret Bloom answers

what is segment 00 in my Linux executable program (64 bits)
AVX feature detection using SIGILL versus CPU probing
Can kernel code make things read-only in a way that other kernel code can't undo?
What's the difference between "Sub-NUMA Clustering" and "Hemisphere and Quadrant Modes" in Intel CPU?
Indirect Y indexed addressing mode in MOS 6502
Load-Acquire/Store-Release and interrupts
Assembly infinite loop (jmp -2)
CS: override on access to global variables in IDA output, like mov eax, cs:x?
Docker and -march native
How does the `asm()` function works in C language?