[haiku-development] Networking speed
- From: Oliver Tappe <zooey@xxxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Thu, 17 Jul 2008 23:40:36 +0200
Hi there,
the last two days I have spent some time doing networking benchmarks with
netperf on different operating systems in order to get more than just a
feeling about how our own netstack performs compared to others.
As I believe the localhost interface should be the least complicated to
analyze (with no hardware to interfere), the results below reflect only the
tests that were run on that interface.
With a netserver listening on localhost, netperf has been invoked as follows:
netperf -f M -t UDP_STREAM -- -m 32768 -s 65500,65500 -S 65500,65500
netperf -f M -t TCP_STREAM -- -m 32768 -s 65500,65500 -S 65500,65500
netperf -t UDP_RR
netperf -t TCP_RR
These were the results (please excuse the ascii-art):
=================================================================
Operating | UDP_STREAM | TCP_STREAM | UDP_RR | TCP_RR
System | (MB/s) | (MB/s) | (req/s) | (req/s)
-------------------+------------+------------+---------+---------
Ubuntu (VM) | 88 | 52 | 7549 | 7379
-------------------+------------+------------+---------+---------
Zeta (VM) | send: 182 | 109 | 3256 | 3256
| recv: 42 | | |
-------------------+------------+------------+---------+---------
OpenSolaris (VM) | send: 567 | 195 | 2295 | 2653
| recv: 49 | | |
-------------------+------------+------------+---------+---------
haiku (VM) | 2 | 29 | 1510 | 911
===================+============+============+=========+=========
OpenSUSE (native) | 737 | 576 | 41932 | 32091
-------------------+------------+------------+---------+---------
haiku (native) | 2 | 127 | 15898 | 12216
=================================================================
Well, obviously, there's quite some room for improvement ;-)
AFAICS, the split values for UDP_STREAM (send/recv) mean that the system
could send much more packets than it could receive (i.e. lots of packets were
dropped).
During the next days, I would like to dive into the net stack in order to
find reasons for the pretty poor performance and do something to improve it.
But before I start, I'd like to ask everyone if you already know about
specific problems/weaknesses in the net stack (or elsewhere in the kernel!)
that could explain the slowness.
cheers,
Oliver
Other related posts:
