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Gustavo Rios [rios.gust...@gmail.com] wrote:
> Hi folks!
>
> I have a simple question: how many cores does OBSD support ?
>
There's various hard-coded limits at something like 64-128 cores (depending on
architecture)
Depending on your application, a useful number of cores is somewhere between
4 and 16 right now, although a purely computational multi-thread/multi-process
application could perhaps use much more.
Applications that make heavy use of kernel services are all undergoing
acceleration as the kernel unlocks and things are changed to take advantage
of parallelization where this is possible.
Here's a 16 core box doing NAT on 250kpps (250k in and out) with vlan tagging
and if_ix multiqueue. One more interesting item here is that the majority of
work is spread across four CPUs. It's running OpenBSD 7.4 (not current
which is has a bit more unlocked.) The same config starts to putter
around 800-900kpps in/out (increased latency) but doesn't drop traffic.
load averages: 1.91, 2.11, 2.04test 18:33:34
35 processes: 34 idle, 1 on processorup 0 days 09:56:29
CPU00: 0.0% user, 0.0% nice, 0.0% sys, 0.4% spin, 4.8% intr, 94.8% idle
CPU01: 0.0% user, 0.0% nice, 39.4% sys, 1.4% spin, 0.0% intr, 59.2% idle
CPU02: 0.0% user, 0.0% nice, 36.8% sys, 0.4% spin, 1.0% intr, 61.8% idle
CPU03: 0.0% user, 0.0% nice, 32.6% sys, 1.6% spin, 0.8% intr, 65.0% idle
CPU04: 0.0% user, 0.0% nice, 23.6% sys, 0.6% spin, 0.8% intr, 75.0% idle
CPU05: 0.0% user, 0.0% nice, 6.0% sys, 0.2% spin, 0.6% intr, 93.2% idle
CPU06: 0.0% user, 0.0% nice, 0.2% sys, 0.2% spin, 1.4% intr, 98.2% idle
CPU07: 0.0% user, 0.0% nice, 0.0% sys, 0.4% spin, 1.8% intr, 97.8% idle
CPU08: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 1.8% intr, 98.2% idle
CPU09: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 2.0% intr, 98.0% idle
CPU10: 0.0% user, 0.0% nice, 0.0% sys, 0.2% spin, 1.8% intr, 98.0% idle
CPU11: 0.0% user, 0.0% nice, 0.0% sys, 0.2% spin, 0.8% intr, 99.0% idle
CPU12: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 1.4% intr, 98.6% idle
CPU13: 0.0% user, 0.0% nice, 0.0% sys, 0.2% spin, 1.4% intr, 98.4% idle
CPU14: 0.0% user, 0.0% nice, 0.0% sys, 0.2% spin, 1.0% intr, 98.8% idle
CPU15: 0.0% user, 0.0% nice, 0.0% sys, 0.0% spin, 1.8% intr, 98.2% idle
Memory: Real: 57M/M act/tot Free: 60G Cache: 815M Swap: 0K/2035M
