Re: Named pipes vs. Unix sockets

On 22 Nov 2024 07:29:16 GMT, vallor <vallor@cultnix.org> wrote in
<lqaq6cF8btnU3@mid.individual.net>:

However, the speed appears to be limited by dd in my examples -- setting
a block size to fill the pipe/packets seems to increase throughput:
 
$ nc -l -U -N /tmp/socket > /dev/null & time -p ( dd if=/dev/zero
count=$[1024*1024*4] bs=1024 | nc -U -N /tmp/socket > /dev/null )

Realized the bottleneck would be the pipe between dd and nc, so wrote
a program to connect to /tmp/socket and spew data at it -- it sends
46950 212992-byte buffers (9999974400 bytes) in 2.41 seconds.
(4149366971 bytes/second, or 4.1GB/s).

(The default "MTU" for a Linux Unix socket connection
is 212992 bytes.  Default pipe size is 8*512 bytes.)

--
-v System76 Thelio Mega v1.1 x86_64 NVIDIA RTX 3090 Ti
   OS: Linux 6.12.0 Release: Mint 21.3 Mem: 258G
   "Profanity is the one language all programmers know best."