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Network performance openbsd 3.6
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: Network performance openbsd 3.6
- From: Matthew Whittaker-Williams <m_(_dot_)_whittaker-williams_(_at_)_iu_(_dot_)_nl>
- Date: Tue, 12 Apr 2005 14:08:03 +0200
- Organization: Internet Unie Services B.V
- Reply-to: m_(_dot_)_whittaker-williams_(_at_)_iu_(_dot_)_nl
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Hash: SHA1
Hi there,
I`ve been using openbsd for quite some time now.
I used to tweak my machines alot to get as much out of it as i could.
But since the 3.6 release some options has been removed from the
kernel and been replaced by sysctl settings.
There for i was trying to figure out what option would actually raise
the nmbclusters.
Unfortunally i wasn`t able to find any documentation on this and from
reading the mailing list alot of people say you shouldn`t tweak
anything anymore and just be happy with the defaults.
After talking to some people they pointed out to tune kern.maxclusters
what would be in effect nmbclusters.
My main concern at the moment is this weird report netstat gives me.
- - ( Test machine ) Bridged setup between em interfaces and 1 fxp
management interface
With a newly build kernel without unnessecary hardware as well as no
options tweaked.
OpenBSD z1c-a20.fw 3.6 Z1CA20.MP#4 i386
real mem = 1072717824 (1047576K)
avail mem = 975048704 (952196K)
mainbus0: Intel MP Specification (Version 1.4) (INTEL Lindenhurst )
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: apic clock running at 200 MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Xeon(TM) CPU 2.80GHz ("GenuineIntel" 686-class) 2.80 GHz
cpu1:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,PNI,MWAIT,CNXT-ID
reports:
=====
netstat -m :
602 mbufs in use:
~ 576 mbufs allocated to data
~ 1 mbuf allocated to packet headers
~ 25 mbufs allocated to socket names and addresses
576/592/6144 mbuf clusters in use (current/peak/max)
1344 Kbytes allocated to network (96% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
vmstat -m:
Memory statistics by bucket size
~ Size In Use Free Requests HighWater Couldfree
~ 16 2096 720 65135 1280 0
~ 32 392 1272 18746 640 843
~ 64 1174 106 18718 320 0
~ 128 1335 73 13642 160 0
~ 256 185 23 4525 80 0
~ 512 1255 97 10125 40 3693
~ 1024 246 34 2076 20 269
~ 2048 27 1 232 10 0
~ 4096 24 1 375 5 0
~ 8192 3 0 3 5 0
~ 16384 7 0 7 5 0
~ 32768 3 0 3 5 0
Memory usage type by bucket size
~ Size Type(s)
~ 16 devbuf, pcb, routetbl, ifaddr, sysctl, vnodes, namecache,
UFS mount,
~ dirhash, proc, in_multi, exec, xform_data, VM swap, UVM amap,
~ UVM aobj, USB, packet tags, temp
~ 32 devbuf, pcb, routetbl, ifaddr, vnodes, UFS mount, sem, dirhash,
~ VFS cluster, ether_multi, xform_data, VM swap, UVM amap,
USB, temp
~ 64 devbuf, pcb, routetbl, ifaddr, UFS mount, sem, dirhash,
in_multi,
~ exec, pfkey data, UVM amap, USB, NDP, temp
~ 128 devbuf, routetbl, ifaddr, vnodes, UFS mount, dirhash, ttys,
UVM amap,
~ USB, USB device, NDP
~ 256 devbuf, routetbl, ifaddr, sysctl, ioctlops, vnodes, shm, VM
map,
~ dirhash, file desc, NFS srvsock, NFS daemon, ttys, newblk,
UVM amap,
~ USB, USB device, temp
~ 512 devbuf, pcb, ifaddr, ioctlops, mount, UFS mount, shm, dirhash,
~ file desc, proc, exec, UVM amap, USB device, temp
~ 1024 devbuf, sysctl, ioctlops, file, ttys, exec, UVM amap, UVM aobj,
~ crypto data, temp
~ 2048 devbuf, ifaddr, ioctlops, UFS mount, proc, pagedep, VM swap,
UVM amap,
~ temp
~ 4096 devbuf, ioctlops, UFS mount, temp
~ 8192 devbuf, MSDOSFS mount
~ 16384 devbuf, NFS node, namecache, UFS quota, UFS mount, ISOFS mount,
~ inodedep
~ 32768 devbuf, namecache
Memory statistics by type Type Kern
~ Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
~ devbuf 4528 1016K 1017K 39322K 10228 0 0
16,32,64,128,256,512,1024,2048,4096,8192,16384,32768
~ pcb 99 8K 10K 39322K 1195 0 0
16,32,64,512
~ routetbl 83 7K 8K 39322K 1813 0 0
16,32,64,128,256
~ ifaddr 115 19K 19K 39322K 117 0 0
16,32,64,128,256,512,2048
~ sysctl 3 2K 2K 39322K 3 0 0
16,256,1024
~ ioctlops 0 0K 4K 39322K 2111 0 0
256,512,1024,2048,4096
~ mount 5 3K 3K 39322K 7 0 0 512
~ NFS node 1 16K 16K 39322K 1 0 0 16384
~ vnodes 53 8K 46K 39322K 5064 0 0
16,32,128,256
~ namecache 3 49K 49K 39322K 3 0 0
16,16384,32768
~ UFS quota 1 16K 16K 39322K 1 0 0 16384
~ UFS mount 21 49K 49K 39322K 21 0 0
16,32,64,128,512,2048,4096,16384
~ shm 2 1K 1K 39322K 2 0 0 256,512
~ VM map 3 1K 1K 39322K 3 0 0 256
~ sem 2 1K 1K 39322K 2 0 0 32,64
~ dirhash 57 11K 51K 39322K 642 0 0
16,32,64,128,256,512
~ file 0 0K 1K 39322K 2 0 0 1024
~ file desc 4 2K 8K 39322K 199 0 0 256,512
~ proc 8 5K 5K 39322K 14 0 0
16,512,2048
~ VFS cluster 0 0K 1K 39322K 108 0 0 32
~ NFS srvsock 2 1K 1K 39322K 2 0 0 256
~ NFS daemon 1 1K 1K 39322K 1 0 0 256
~ in_multi 36 2K 2K 39322K 36 0 0 16,64
~ ether_multi 10 1K 1K 39322K 10 0 0 32
~ ISOFS mount 1 16K 16K 39322K 1 0 0 16384
~ MSDOSFS mount 1 8K 8K 39322K 1 0 0 8192
~ ttys 420 245K 245K 39322K 420 0 0
128,256,1024
~ exec 0 0K 2K 39322K 1864 0 0
16,64,512,1024
~ pfkey data 1 1K 1K 39322K 2 0 0 64
~ xform_data 0 0K 1K 39322K 36 0 0 16,32
~ pagedep 1 2K 2K 39322K 1 0 0 2048
~ inodedep 1 16K 16K 39322K 1 0 0 16384
~ newblk 1 1K 1K 39322K 1 0 0 256
~ VM swap 5 3K 3K 39322K 5 0 0
16,32,2048
~ UVM amap 1157 66K 122K 39322K 100572 0 0
16,32,64,128,256,512,1024,2048
~ UVM aobj 2 2K 2K 39322K 2 0 0 16,1024
~ USB 68 7K 7K 39322K 68 0 0
16,32,64,128,256
~ USB device 20 9K 9K 39322K 20 0 0
128,256,512
~ crypto data 1 1K 1K 39322K 1 0 0 1024
~ packet tags 0 0K 1K 39322K 4 0 0 16
~ NDP 13 2K 2K 39322K 16 0 0 64,128
~ temp 21 7K 11K 39322K 8993 0 0
16,32,64,256,512,1024,2048,4096
Memory Totals: In Use Free Requests
~ 1588K 161K 133593
Memory resource pool statistics
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg
Maxpg Idle
extentpl 20 187 0 150 1 0 1 1
0 8 0
phpool 40 772 0 89 8 0 8 8
0 8 0
pmappl 76 1730 0 1711 1 0 1 1
0 8 0
vmsppl 216 1730 0 1711 2 0 2 2
0 8 0
vmmpepl 88 72710 0 72020 29 6 23 25
0 8 8
vmmpekpl 88 5161 0 5146 1 0 1 1
0 8 0
aobjpl 52 1 0 0 1 0 1 1
0 8 0
amappl 40 29958 0 29583 6 0 6 6
0 8 0
bufpl 116 11 0 11 1 0 1 1
0 8 1
mbpl 256 91316 0 90711 40 0 40 40
1 8 2
mclpl 2048 56089 0 55512 296 0 296 296 4
3072 7
sockpl 200 2440 0 2344 7 0 7 7
0 8 2
procpl 328 1743 0 1711 4 0 4 4
0 8 1
zombiepl 72 1711 0 1711 1 0 1 1
0 8 1
ucredpl 80 464 0 404 2 0 2 2
0 8 0
pgrppl 24 114 0 100 1 0 1 1
0 8 0
sessionpl 48 59 0 46 1 0 1 1
0 8 0
pcredpl 24 1743 0 1711 1 0 1 1
0 8 0
lockfpl 48 2112 0 2110 1 0 1 1
0 8 0
filepl 48 66512 0 66374 3 0 3 3
0 8 1
fdescpl 292 1744 0 1711 4 0 4 4
0 8 1
pipepl 72 1706 0 1700 1 0 1 1
0 8 0
sigapl 316 1730 0 1711 3 0 3 3
0 8 1
scxspl 128 33442 0 33442 1 0 1 1
0 8 1
wdcspl 96 8 0 8 1 0 1 1
0 8 1
namei 1024 268025 0 268025 2 0 2 2
0 8 2
vnodes 196 4191 0 0 210 0 210 210
0 8 0
nchpl 64 2398 0 0 39 0 39 39
0 8 0
ffsino 284 192215 0 188031 299 0 299 299
0 8 0
dirhash 1024 744 0 685 104 89 15 93
0 8 0
pfrulepl 556 154 0 118 11 0 11 11
0 8 3
pfstatepl 256 1784 0 1783 5 0 5 5 0
1250 4
pfrktable 1240 21 0 16 3 0 3 3
0 8 0
pfrkentry 152 28 0 21 1 0 1 1
0 8 0
pfosfpen 108 1725 0 1380 18 8 10 10
0 8 0
pfosfp 28 940 0 752 2 0 2 2
0 8 0
rtentpl 108 36 0 2 1 0 1 1
0 8 0
tcpcbpl 360 351 0 346 1 0 1 1
0 8 0
tcpqepl 20 2 0 2 1 0 1 1
0 16 1
synpl 180 3 0 3 1 0 1 1
0 8 1
plimitpl 152 247 0 237 1 0 1 1
0 8 0
inpcbpl 216 1254 0 1248 1 0 1 1
0 8 0
In use 3718K, total allocated 4056K; utilization 91.7%
I am totaly confused about this utilization, because how can it be 91%
in use without anything running.
This even when pf is disabled and the only connection to the machine
is my ssh connection.
devices:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33224
~ inet 127.0.0.1 netmask 0xff000000
~ inet6 ::1 prefixlen 128
~ inet6 fe80::1%lo0 prefixlen 64 scopeid 0x7
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
~ address: 00:30:48:2c:53:00
~ media: Ethernet autoselect (100baseTX full-duplex)
~ status: active
~ inet6 fe80::230:48ff:fe2c:5300%em0 prefixlen 64 scopeid 0x1
em1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
~ address: 00:30:48:2c:53:01
~ media: Ethernet autoselect (1000baseT full-duplex)
~ status: active
~ inet6 fe80::230:48ff:fe2c:5301%em1 prefixlen 64 scopeid 0x2
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
~ address: 00:0e:0c:73:f3:a2
~ media: Ethernet autoselect (100baseTX full-duplex)
~ status: active
~ inet 192.168.255.131 netmask 0xffffff00 broadcast 192.168.255.255
~ inet6 fe80::20e:cff:fe73:f3a2%fxp0 prefixlen 64 scopeid 0x3
pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33224
pfsync0: flags=0<> mtu 2020
enc0: flags=0<> mtu 1536
bridge0: flags=41<UP,RUNNING> mtu 1500
bridge1: flags=0<> mtu 1500
- --
When i try to tweak some options:
kern.maxclusters=16384
kern.somaxconn=512
kern.maxfiles=16384
The usage reports:
=============
netstat -m:
602 mbufs in use:
~ 576 mbufs allocated to data
~ 1 mbuf allocated to packet headers
~ 25 mbufs allocated to socket names and addresses
576/588/16384 mbuf clusters in use (current/peak/max)
1336 Kbytes allocated to network (97% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
vmstat -m:
Memory statistics by bucket size
~ Size In Use Free Requests HighWater Couldfree
~ 16 2056 248 8306 1280 0
~ 32 1602 62 2812 640 0
~ 64 1174 42 3170 320 0
~ 128 1335 9 2081 160 0
~ 256 185 23 1509 80 0
~ 512 1244 12 1641 40 0
~ 1024 245 3 386 20 0
~ 2048 27 1 82 10 0
~ 4096 24 1 264 5 0
~ 8192 3 0 3 5 0
~ 16384 7 0 7 5 0
~ 32768 3 0 3 5 0
Memory usage type by bucket size
~ Size Type(s)
~ 16 devbuf, pcb, routetbl, ifaddr, sysctl, vnodes, namecache,
UFS mount,
~ dirhash, proc, in_multi, exec, xform_data, VM swap, UVM amap,
~ UVM aobj, USB, packet tags, temp
~ 32 devbuf, pcb, routetbl, ifaddr, vnodes, UFS mount, sem, dirhash,
~ VFS cluster, ether_multi, xform_data, VM swap, UVM amap,
USB, temp
~ 64 devbuf, pcb, routetbl, ifaddr, UFS mount, sem, dirhash,
in_multi,
~ exec, pfkey data, UVM amap, USB, NDP, temp
~ 128 devbuf, routetbl, ifaddr, vnodes, UFS mount, ttys, UVM amap,
USB,
~ USB device, NDP
~ 256 devbuf, routetbl, ifaddr, sysctl, ioctlops, vnodes, shm, VM
map,
~ file desc, NFS srvsock, NFS daemon, ttys, newblk, UVM amap,
USB,
~ USB device, temp
~ 512 devbuf, pcb, ifaddr, ioctlops, mount, UFS mount, shm, dirhash,
~ file desc, proc, exec, UVM amap, USB device, temp
~ 1024 devbuf, ioctlops, file, ttys, exec, UVM amap, UVM aobj,
crypto data,
~ temp
~ 2048 devbuf, ifaddr, ioctlops, UFS mount, proc, pagedep, VM swap,
UVM amap,
~ temp
~ 4096 devbuf, ioctlops, UFS mount, temp
~ 8192 devbuf, MSDOSFS mount
~ 16384 devbuf, NFS node, namecache, UFS quota, UFS mount, ISOFS mount,
~ inodedep
~ 32768 devbuf, namecache
Memory statistics by type Type Kern
~ Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
~ devbuf 4530 1016K 1017K 39322K 4631 0 0
16,32,64,128,256,512,1024,2048,4096,8192,16384,32768
~ pcb 99 8K 8K 39322K 135 0 0
16,32,64,512
~ routetbl 83 7K 8K 39322K 187 0 0
16,32,64,128,256
~ ifaddr 115 19K 19K 39322K 117 0 0
16,32,64,128,256,512,2048
~ sysctl 2 1K 1K 39322K 2 0 0 16,256
~ ioctlops 0 0K 4K 39322K 817 0 0
256,512,1024,2048,4096
~ mount 5 3K 3K 39322K 7 0 0 512
~ NFS node 1 16K 16K 39322K 1 0 0 16384
~ vnodes 1264 46K 46K 39322K 1266 0 0
16,32,128,256
~ namecache 3 49K 49K 39322K 3 0 0
16,16384,32768
~ UFS quota 1 16K 16K 39322K 1 0 0 16384
~ UFS mount 21 49K 49K 39322K 21 0 0
16,32,64,128,512,2048,4096,16384
~ shm 2 1K 1K 39322K 2 0 0 256,512
~ VM map 3 1K 1K 39322K 3 0 0 256
~ sem 2 1K 1K 39322K 2 0 0 32,64
~ dirhash 27 5K 5K 39322K 27 0 0
16,32,64,512
~ file 0 0K 1K 39322K 2 0 0 1024
~ file desc 4 2K 2K 39322K 5 0 0 256,512
~ proc 8 5K 5K 39322K 10 0 0
16,512,2048
~ VFS cluster 0 0K 1K 39322K 60 0 0 32
~ NFS srvsock 2 1K 1K 39322K 2 0 0 256
~ NFS daemon 1 1K 1K 39322K 1 0 0 256
~ in_multi 36 2K 2K 39322K 36 0 0 16,64
~ ether_multi 10 1K 1K 39322K 10 0 0 32
~ ISOFS mount 1 16K 16K 39322K 1 0 0 16384
~ MSDOSFS mount 1 8K 8K 39322K 1 0 0 8192
~ ttys 420 245K 245K 39322K 420 0 0
128,256,1024
~ exec 0 0K 2K 39322K 348 0 0
16,64,512,1024
~ pfkey data 1 1K 1K 39322K 2 0 0 64
~ xform_data 0 0K 1K 39322K 18 0 0 16,32
~ pagedep 1 2K 2K 39322K 1 0 0 2048
~ inodedep 1 16K 16K 39322K 1 0 0 16384
~ newblk 1 1K 1K 39322K 1 0 0 256
~ VM swap 5 3K 3K 39322K 5 0 0
16,32,2048
~ UVM amap 1130 65K 67K 39322K 10731 0 0
16,32,64,128,256,512,1024,2048
~ UVM aobj 2 2K 2K 39322K 2 0 0 16,1024
~ USB 68 7K 7K 39322K 68 0 0
16,32,64,128,256
~ USB device 20 9K 9K 39322K 20 0 0
128,256,512
~ crypto data 1 1K 1K 39322K 1 0 0 1024
~ packet tags 0 0K 1K 39322K 4 0 0 16
~ NDP 13 2K 2K 39322K 16 0 0 64,128
~ temp 21 7K 11K 39322K 1279 0 0
16,32,64,256,512,1024,2048,4096
Memory Totals: In Use Free Requests
~ 1619K 31K 20267
Memory resource pool statistics
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg
Maxpg Idle
extentpl 20 187 0 150 1 0 1 1
0 8 0
phpool 40 511 0 0 6 0 6 6
0 8 0
pmappl 76 207 0 188 1 0 1 1
0 8 0
vmsppl 216 207 0 188 2 0 2 2
0 8 0
vmmpepl 88 9511 0 8833 17 0 17 17
0 8 2
vmmpekpl 88 513 0 502 1 0 1 1
0 8 0
aobjpl 52 1 0 0 1 0 1 1
0 8 0
amappl 40 3140 0 2774 4 0 4 4
0 8 0
bufpl 116 10 0 10 1 0 1 1
0 8 1
mbpl 256 2538 0 1934 40 0 40 40
1 8 2
mclpl 2048 1035 0 458 294 0 294 294 4
8192 4
sockpl 200 164 0 68 5 0 5 5
0 8 0
procpl 328 220 0 188 3 0 3 3
0 8 0
zombiepl 72 188 0 188 1 0 1 1
0 8 1
ucredpl 80 67 0 9 2 0 2 2
0 8 0
pgrppl 24 22 0 8 1 0 1 1
0 8 0
sessionpl 48 15 0 2 1 0 1 1
0 8 0
pcredpl 24 220 0 188 1 0 1 1
0 8 0
lockfpl 48 6 0 4 1 0 1 1
0 8 0
filepl 48 2611 0 2473 2 0 2 2
0 8 0
fdescpl 292 221 0 188 3 0 3 3
0 8 0
pipepl 72 126 0 120 1 0 1 1
0 8 0
sigapl 316 207 0 188 2 0 2 2
0 8 0
scxspl 128 1597 0 1597 1 0 1 1
0 8 1
wdcspl 96 8 0 8 1 0 1 1
0 8 1
namei 1024 6404 0 6404 2 0 2 2
0 8 2
vnodes 196 2102 0 0 106 0 106 106
0 8 0
nchpl 64 2398 0 0 39 0 39 39
0 8 0
ffsino 284 2093 0 36 147 0 147 147
0 8 0
dirhash 1024 32 0 0 8 0 8 8
0 8 0
pfrulepl 556 46 0 10 7 0 7 7
0 8 1
pfstatepl 256 11 0 7 1 0 1 1 0
1250 0
pfrktable 1240 9 0 4 3 0 3 3
0 8 0
pfrkentry 152 7 0 0 1 0 1 1
0 8 0
pfosfpen 108 690 0 345 12 2 10 10
0 8 0
pfosfp 28 376 0 188 2 0 2 2
0 8 0
rtentpl 108 35 0 1 1 0 1 1
0 8 0
tcpcbpl 360 5 0 0 1 0 1 1
0 8 0
synpl 180 1 0 1 1 0 1 1
0 8 1
plimitpl 152 13 0 3 1 0 1 1
0 8 0
inpcbpl 216 38 0 32 1 0 1 1
0 8 0
In use 2694K, total allocated 2896K; utilization 93.0%
What i don`t seem to understand is how openbsd can use so much memory
with default settings.
And when tweaking it somewhat it will still report > 90 % usage.
It might be i am interperting this wrong but from what i know is when
it reaches 100 % usage it will deny connections that are being made.
The weird thing is all my freebsd systems only report 3% usage and a
different openbsd box on a via C3 proccessor only reports:
cpu0: VIA Samuel 2 ("CentaurHauls" 686-class) 533 MHz
cpu0: FPU,DE,TSC,MSR,MTRR,PGE,MMX
real mem = 125349888 (122412K)
avail mem = 107626496 (105104K)
netstat -m:
27 mbufs in use:
~ 1 mbuf allocated to data
~ 1 mbuf allocated to packet headers
~ 25 mbufs allocated to socket names and addresses
0/82/6144 mbuf clusters in use (current/peak/max)
208 Kbytes allocated to network (3% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
On my freebsd systems it only reports 3%.
So i am a bit dazed on how openbsd deals with this.
There for i am wondering if any of you fokes can give me any advice on
where to look at next on how to get this usage down some what so i can
change the machine to production.
Could it perhaps have to do with SMP being enabled?
I am having my second thoughts about this em driver aswell, because
since i`ve been using em cards under openbsd it seems to take alot
more memory then the normal fxp card do.
Well let me know
In hope to figure this thing out...
With kind regards
Matthew Whittaker-Williams
- --
Unix & Network Engineer
Internet Unie
Postbus 23667
1100 ED AMSTERDAM
Tel: 020 463 0506
Fax: 020 463 2146
Email: m_(_dot_)_whittaker-williams_(_at_)_iu_(_dot_)_nl
URL: http://iu.nl
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