Date: Thu, 30 Mar 2006 13:45:17 -0500 From: Stephen Clark <Stephen.Clark@seclark.us> To: stable@freebsd.org Subject: Re: 4.9 network not freeing memory Message-ID: <442C273D.105@seclark.us> In-Reply-To: <20060330053231.GS60807@ufanet.ru> References: <442B23CA.3060808@seclark.us> <20060330034353.GR60807@ufanet.ru> <442B56B2.1070107@seclark.us> <20060330053231.GS60807@ufanet.ru>
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damir bikmuhametov wrote:
>On Wed, Mar 29, 2006 at 10:55:30PM -0500, Stephen Clark wrote:
>
>
>>>Try to increase net.inet.ip.intr_queue_maxlen and monitor
>>>net.inet.ip.intr_queue_drops.
>>>
>>>
>>Increasing net.inet.ip.intr_queue_maxlen to 400 seems to have fixed the
>>problem.
>>
>>
>
>Could you please report this to the list after some testing?
>
>Thanks.
>
>
>
Do you know if the queue_maxlen is exceeded do the mbufs get lost? It
sort of seems that is
what happens.
This is after a test where I was increment queue_maxlen til queue_drops
were not increasing.
$ sysctl net.inet.ip.intr_queue_drops
net.inet.ip.intr_queue_drops: 27444
X10001:~
At this point the network after my test the network is pretty much quiet.
But there are still mbufs allocated for data??
$ netstat -m
689/5504/131072 mbufs in use (current/peak/max):
689 mbufs allocated to data
265/4958/32768 mbuf clusters in use (current/peak/max)
11292 Kbytes allocated to network (11% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
After a reboot:
X10001:~
$ sysctl net.inet.ip.intr_queue_drops
net.inet.ip.intr_queue_drops: 0
X10001:~
$ netstat -m
2/416/131072 mbufs in use (current/peak/max):
2 mbufs allocated to data
0/44/32768 mbuf clusters in use (current/peak/max)
192 Kbytes allocated to network (0% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
This after a reboot and another test with queue_maxlen=400
Note there are only 3 mbufs allocated to data.
sysctl net.inet.ip.intr_queue_drops
net.inet.ip.intr_queue_drops: 0
X10001:~
$ netstat -m
3/416/131072 mbufs in use (current/peak/max):
3 mbufs allocated to data
0/44/32768 mbuf clusters in use (current/peak/max)
192 Kbytes allocated to network (0% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
Is there some way to see what the current queue length is? Like the
queue drops.
What do you think?
Regards,
Steve
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