Date: Sat, 5 Jul 2003 15:25:05 +0200 From: Wilko Bulte <wkb@freebie.xs4all.nl> To: Maxime Henrion <mux@freebsd.org> Cc: current@freebsd.org Subject: Re: Call for testers: patch to convert dc(4) to busdma Message-ID: <20030705132505.GA11334@freebie.xs4all.nl> In-Reply-To: <20030704001335.GM42121@elvis.mu.org> References: <20030704001335.GM42121@elvis.mu.org>
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Could it be there is something fishy with mbuf handling?
I ran netperf from my DS10 Alpha box towards a 4-stable
netperf-receiver (called freebie)
As in:
ds10#ls
netperf tcp_range_script udp_rr_script
netserver tcp_rr_script udp_stream_script
snapshot_script tcp_stream_script
ds10#./tcp_range_script freebie
------------------------------------
Testing with the following command line:
/usr/local/netperf/netperf -l 60 -H freebie -t TCP_STREAM -i 10,2 -I 99,3 --
-m 1 -s 32768 -S 32768
TCP STREAM TEST to freebie : +/-1.5% @ 99% conf. : histogram
After some time one gets:
Out of mbuf address space!
Consider increasing NMBCLUSTERS
All mbufs or mbuf clusters exhausted, please see tuning(7).
Out of mbuf address space!
Consider increasing NMBCLUSTERS
All mbufs or mbuf clusters exhausted, please see tuning(7).
Initially things were like:
ds10#netstat -m
mbuf usage:
GEN cache: 0/0 (in use/in pool)
CPU #0 cache: 2195/2240 (in use/in pool)
Total: 2195/2240 (in use/in pool)
Mbuf cache high watermark: 512
Maximum possible: 18176
Allocated mbuf types:
2195 mbufs allocated to data
12% of mbuf map consumed
mbuf cluster usage:
GEN cache: 0/0 (in use/in pool)
CPU #0 cache: 2189/2192 (in use/in pool)
Total: 2189/2192 (in use/in pool)
Cluster cache high watermark: 128
Maximum possible: 9088
24% of cluster map consumed
4944 KBytes of wired memory reserved (99% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
and after the machine ran out of buffers it displayed:
ds10#netstat -m
mbuf usage:
GEN cache: 0/0 (in use/in pool)
CPU #0 cache: 9061/9088 (in use/in pool)
Total: 9061/9088 (in use/in pool)
Mbuf cache high watermark: 512
Maximum possible: 18176
Allocated mbuf types:
9061 mbufs allocated to data
50% of mbuf map consumed
mbuf cluster usage:
GEN cache: 0/0 (in use/in pool)
CPU #0 cache: 9058/9072 (in use/in pool)
Total: 9058/9072 (in use/in pool)
Cluster cache high watermark: 128
Maximum possible: 9088
99% of cluster map consumed
20416 KBytes of wired memory reserved (99% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
ds10#
During the test run there was a steady increase in the % for the cluster
map.
Wilko
--
| / o / /_ _ wilko@FreeBSD.org
|/|/ / / /( (_) Bulte
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