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Re: Slow read(2) and write(2) syscalls

On Wed, 29 Apr 2020 09:17:54 +0100
Chavdar Ivanov <> wrote:

> On my VirtualBox 6.1.6 guest running -current amd64 I get:
> $  time cat 80mb > /dev/null
> cat 80mb > /dev/null  0.00s user 0.02s system 98% cpu 0.021 total

Yeah this test is not very useful, 80MiB is hardly anything and most of
it is probably going from/to file cache.

If you write around 10GiB

dd if=/dev/zero of=out bs=1m count=10000

do you get similar I/O throughput on NetBSD and Linux guests?

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