MEMBW(8)

💖 MEMBW 💖 (that's section 8 of the System Manager's Manual, bestie)

okay so welcome to membw, a whole entire tool for generating memory bandwidth, and yes it lives in the System Manager's Manual like the little sysadmin icon it is 🎀

✨ NAME ✨

membw — the tool for generating memory bandwidth 💫

🌸 SYNOPSIS 🌸

membw [OPTIONS][OPERATION]

🦋 DESCRIPTION 🦋

okay so here's the tea 🍓 — the membw software tool is literally the way to stress local and remote memory bandwidth, using a whole variety of memory operations. not me being versatile, we love to see it 💅

and the best part? you get to choose which operation runs, so you can generate a specified amount of memory bandwidth on a selected core. you're the main character, you pick the core, you pick the vibe, the bandwidth follows. periodt ✨

👑 OPTIONS 👑

the membw options are as follow, bestie, and we are going through ALL of them, no skipping, no cap:

• --help — show help 🫶 (the classic "help me help you" moment)
• -c, --cpu — the cpu you want to generate B/W on 👑 pick your fighter
• -b, --bandwidth — memory B/W, specified in MBps 🔥 like, how much bandwidth are we cooking with

🌈 OPERATION 🌈

here's the menu of operations, and honestly? it's giving variety. every single one is listed below, exactly as it is, no edits, no cuts 🙈

• --prefetch-t0 — prefetcht0
• --prefetch-t1 — prefetcht1
• --prefetch-t2 — prefetcht2
• --prefetch-nta — prefetchtnta
• --prefetch-w — prefetchw
• --read — x86 loads
• --read-sse — SSE loads
• --nt-read-sse — SSE NT loads
• --read-mod-write — x86 load XOR write
• --write — x86 stores
• --write-avx512 — AVX512 stores
• --write-clwb — x86 stores + clwb
• --write-flush — x86 stores & clflush (naturally generates loads & stores)
• --write-sse — SSE stores
• --write-sse-flush — SSE stores & clflush (naturally generates loads & stores)
• --nt-write — x86 NT stores
• --nt-write-avx512 — AVX512 NT stores
• --nt-write-clwb — x86 NT stores + clwb
• --nt-write-sse — SSE NT stores

like okay the flush ones "naturally generate loads & stores" too, that's just how they do 💀 noted, respected, moving on.

💜 AUTHOR 💜

membw was written by Michal Aleksinski <michalx.aleksinski@intel.com>, Adrian Boczkowski <adrianx.boczkowski@intel.com>, Wojciech Andralojc <wojciechx.andralojc@intel.com>, and Marcel Cornu <marcel.d.cornu@intel.com>, 💖

This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 😭 like fr fr, zero warranty, none, not even a little one, do not come for them.

and that's the whole page, bestie 🌸 this one's dated Jul 29, 2021, straight from the System Manager's Manual — so go stress that bandwidth responsibly, mwah 💅✨