PAR_OPS(8)

✨ PAR_OPS(8) — basic CPU operation parallelism ✨

okay bestie, welcome to par_ops, a page from the LMBENCH manual, section 8 (that's the sysadmin-y one 🫶). sit down, hydrate, let's talk CPU parallelism.

🌸 NAME 🌸

par_ops — basic CPU operation parallelism. yes that's the whole vibe. it's giving "how many of these can my CPU do at once" energy 💅

🎀 SYNOPSIS 🎀

par_ops [ -W <warmups> ] [ -N <repetitions> ]

🦋 DESCRIPTION 🦋

so par_ops measures the available parallelism for basic CPU operations, like integer ADD. that's it, that's the job.

and how does it report the tea? Results come out as the average operation latency divided by the minimum average operation latency across all levels of parallelism. yes, a ratio. a little fraction. iconic behavior honestly.

here's the full menu of what it pokes at, no cap:

• integer bit, add, mul, div, mod operations; — maximum parallelism for integer XOR, ADD, MUL, DIV, MOD operations.
• uint64 bit, add, mul, div, mod operations; — maximum parallelism for uint64 XOR, ADD, MUL, DIV, MOD operations.
• float add, mul, div operations; — maximum parallelism for flot ADD, MUL, DIV operations.
• double add, mul, div operations; — maximum parallelism for flot ADD, MUL, DIV operations.

(not me pointing out that "flot" is spelled that way in the original — i'm keeping it exactly as-is, it's part of the lore now 💀)

💀 BUGS 💀

This benchmark is highly experimental and may sometimes (frequently?) give erroneous results.

like. read that again. they really said "sometimes (frequently?)" and just left it there. so if your numbers look cursed, bestie, they might literally be cursed. trust nothing, verify everything 🙈

🌈 SEE ALSO 🌈

• lmbench(8)
• lat_ops(8)
• par_mem(8)

👑 AUTHOR 👑

Carl Staelin and Larry McVoy

Comments, suggestions, and bug reports are always welcome. (they want your feedback fr fr, so send it 🫶)

and that's a wrap, angel ✨ this whole thing is (c)2000 Carl Staelin and Larry McVoy, with the version stamp $Date$ — periodt 💖