Hi all!
I have pair of routers configured with CARP, pfsync, trunk interface
and a really simple pf. The main purpose of this system is
load-balancing WWW traffic among two web servers. In production
environment rdr will be replaced by relayd(8). All of them running on
Dell R200 (see attached dmesg below). There is one external interface,
one pfsync (both bge(4)) and internal interface is trunk(4) configured
with two em(4) in round-robin mode. My pf.conf:
ext_if=3Dbge0
ext_carp_if=3Dcarp0
pfsync_if=3Dbge1
int_if=3Dtrunk0
trunk_part_1=3Dem0
trunk_part_2=3Dem1
set limit states 262144
set skip on lo0
set skip on $pfsync_if
set skip on $trunk_part_1
set skip on $trunk_part_2
rdr on $ext_if inet proto tcp \
from any to ($ext_carp_if) port http -> <webhosts> port http
round-robin sticky-address
block in on $ext_if
pass in quick on $ext_if inet proto tcp \
from any to <webhosts> port http \
keep state
The highest packet rate which this system is able to forwarding is
about 30k pps. It is rather small and I expected at least 80k pps and
even two times more because of trunk interface at internal side. I
tested it with siege running on several machines connected to switch
at external side. During test top shows very high interrupt CPU
utilization - even 90 %.
I tried bsd and bsd.mp kernel (the second one has a little lower
performance but 3-5 % is acceptable for me). I also replaced
integrated bge(4) with em(4) (Intel PRO 1000/PT Dual port) but without
noticeable improvement. I tried to run all interfaces on the same IRQ
but without effect. I did system tuning according to
https://calomel.org/network_performance.html (changed send and
recevspace to 256144 and several more minor improvements) but without
effect.
How can I improve packet forwarding speed? Or I just reached upper
limit of packet forwarding for this machine?
If anyone need more information about this system (sysctls,
configurations, etc) please ask and I'll post it.
dmesg:
OpenBSD 4.6 (GENERIC) #58: Thu Jul 9 21:24:42 MDT 2009
dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Xeon(R) CPU X3220 @ 2.40GHz ("GenuineIntel" 686-class) 2.41 =
GHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE=
36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST=
,TM2,CX16,xTPR
real mem =3D 2145689600 (2046MB)
avail mem =3D 2065989632 (1970MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 05/15/09, BIOS32 rev. 0 @
0xfac90, SMBIOS rev. 2.5 @ 0x7ff9c000 (46 entries)
bios0: vendor Dell Inc. version "1.4.3" date 05/15/2009
bios0: Dell Inc. PowerEdge R200
acpi0 at bios0: rev 2
acpi0: tables DSDT FACP APIC SPCR HPET MCFG WD__ SLIC ERST HEST BERT
EINJ SSDT SSDT SSDT SSDT SSDT
acpi0: wakeup devices PCI0(S5)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: apic clock running at 266MHz
cpu at mainbus0: not configured
cpu at mainbus0: not configured
cpu at mainbus0: not configured
ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 0, remapped to apid 4
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (PEX1)
acpiprt2 at acpi0: bus 2 (SBE0)
acpiprt3 at acpi0: bus 3 (SBE4)
acpiprt4 at acpi0: bus 4 (SBE5)
acpiprt5 at acpi0: bus 5 (COMP)
acpicpu0 at acpi0: PSS
bios0: ROM list: 0xc0000/0x9000 0xec000/0x4000!
ipmi at mainbus0 not configured
cpu0: Enhanced SpeedStep 2401 MHz: speeds: 2400, 2133, 1867, 1600 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 3200/3210 Host" rev 0x01
ppb0 at pci0 dev 1 function 0 "Intel 3200/3210 PCIE" rev 0x01: apic 4
int 16 (irq 15)
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x02: apic 4
int 16 (irq 15)
pci2 at ppb1 bus 2
em0 at pci2 dev 0 function 0 "Intel PRO/1000 PT (82571EB)" rev 0x06:
apic 4 int 16 (irq 15), address 00:15:17:c8:90:36
em1 at pci2 dev 0 function 1 "Intel PRO/1000 PT (82571EB)" rev 0x06:
apic 4 int 17 (irq 15), address 00:15:17:c8:90:37
ppb2 at pci0 dev 28 function 4 "Intel 82801I PCIE" rev 0x02
pci3 at ppb2 bus 3
bge0 at pci3 dev 0 function 0 "Broadcom BCM5721" rev 0x21, BCM5750 C1
(0x4201): apic 4 int 16 (irq 15), address 00:25:64:3c:10:17
brgphy0 at bge0 phy 1: BCM5750 10/100/1000baseT PHY, rev. 0
ppb3 at pci0 dev 28 function 5 "Intel 82801I PCIE" rev 0x02
pci4 at ppb3 bus 4
bge1 at pci4 dev 0 function 0 "Broadcom BCM5721" rev 0x21, BCM5750 C1
(0x4201): apic 4 int 17 (irq 15), address 00:25:64:3c:10:18
brgphy1 at bge1 phy 1: BCM5750 10/100/1000baseT PHY, rev. 0
uhci0 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x02: apic 4
int 21 (irq 11)
uhci1 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x02: apic 4
int 20 (irq 11)
uhci2 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x02: apic 4
int 21 (irq 11)
ehci0 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x02: apic 4
int 21 (irq 11)
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb4 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0x92
pci5 at ppb4 bus 5
vga1 at pci5 dev 5 function 0 "ATI ES1000" rev 0x02
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
radeondrm0 at vga1: apic 4 int 19 (irq 5)
drm0 at radeondrm0
ichpcib0 at pci0 dev 31 function 0 "Intel 82801IR LPC" rev 0x02: PM disable=
d
pciide0 at pci0 dev 31 function 2 "Intel 82801I SATA" rev 0x02: DMA,
channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide0: using apic 4 int 23 (irq 6) for native-PCI interrupt
wd0 at pciide0 channel 0 drive 0: <WDC WD1602ABKS-18N8A0>
wd0: 16-sector PIO, LBA48, 152587MB, 312500000 sectors
atapiscsi0 at pciide0 channel 0 drive 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <TSSTcorp, DVD-ROM TS-L333A, D450> ATAPI
5/cdrom removable
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
cd0(pciide0:0:1): using PIO mode 4, Ultra-DMA mode 5
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at ichpcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
mtrr: Pentium Pro MTRR support
uhub4 at uhub0 port 5 "Cypress Semiconductor USB2 Hub" rev 2.00/0.0b addr 2
softraid0 at root
root on wd0a swap on wd0b dump on wd0b
carp: carp0 demoted group carp to 129
carp1: state transition: INIT -> BACKUP
carp: pfsync0 demoted group carp to 130
carp: pfsync0 demoted group pfsync to 1
--
Kind regards, Bartosz Kuzma.
