Date: Sat, 28 Feb 2004 21:02:11 -0500 From: Deepak Jain <deepak@ai.net> To: freebsd-hackers@freebsd.org Subject: em0, polling performance, P4 2.8ghz FSB 800mhz Message-ID: <40414823.9040507@ai.net>
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I have a machine running 4.9. P4 2.8Ghz, 800mhz bus, Intel PRO/1000
ethernet connected to a Cisco, both sides are locked to 1000/FD.
The kernel has HZ=1000, and DEVICE_POLLING, IPFW, DUMMYNET, etc. After
only a few minutes of run time under an attack ~90,000 pps. The attack
has been limited at the router to JUST incoming TCP port 80 inbound
traffic. I don't know why the machine is having such a hard time under
the load. The cpu shows it is >90% idle even under the worst of the
attack. What am I doing wrong?
Thanks,
DJ
#sysctl -a |grep hz
kern.clockrate: { hz = 1000, tick = 1000, tickadj = 1, profhz = 1024,
stathz = 1
28 }
#sysctl -a |grep polling
kern.polling.burst: 544
kern.polling.each_burst: 30
kern.polling.burst_max: 550
kern.polling.idle_poll: 1
kern.polling.poll_in_trap: 0
kern.polling.user_frac: 50
kern.polling.reg_frac: 30
kern.polling.short_ticks: 44151
kern.polling.lost_polls: 84925
kern.polling.pending_polls: 0
kern.polling.residual_burst: 0
kern.polling.handlers: 1
kern.polling.enable: 1
kern.polling.phase: 0
kern.polling.suspect: 39272
kern.polling.stalled: 5
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.9-RELEASE #8: Sat Feb 28 23:42:41 GMT 2004
Timecounter "i8254" frequency 1193182 Hz
CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2806.38-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf29 Stepping = 9
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,C
MOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Hyperthreading: 2 logical CPUs
real memory = 2147418112 (2097088K bytes)
avail memory = 2085978112 (2037088K bytes)
Preloaded elf kernel "kernel" at 0xc04fa000.
Warning: Pentium 4 CPU: PSE disabled
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 12 entries at 0xc00fdea0
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <PCI to PCI bridge (vendor=8086 device=2579)> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pcib2: <PCI to PCI bridge (vendor=8086 device=257b)> at device 3.0 on pci0
pci2: <PCI bus> on pcib2
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.16> port
0xb000-0xb01f
mem 0xf3000000-0xf301ffff irq 12 at device 1.0 on pci2
em0: Speed:N/A Duplex:N/A
uhci0: <Intel 82801EB (ICH5) USB controller USB-A> port 0xcc00-0xcc1f
irq 11 at
device 29.0 on pci0
usb0: <Intel 82801EB (ICH5) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801EB (ICH5) USB controller USB-B> port 0xc000-0xc01f
irq 3 at d
evice 29.1 on pci0
usb1: <Intel 82801EB (ICH5) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801EB (ICH5) USB controller USB-C> port 0xc400-0xc41f
irq 12 at
device 29.2 on pci0
usb2: <Intel 82801EB (ICH5) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhci3: <Intel 82801EB (ICH5) USB controller USB-D> port 0xc800-0xc81f
irq 11 at
device 29.3 on pci0
usb3: <Intel 82801EB (ICH5) USB controller USB-D> on uhci3
usb3: USB revision 1.0
uhub3: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3: 2 ports with 2 removable, self powered
pci0: <USB controller> at 29.7 irq 7
pcib3: <Intel 82801BA/BAM (ICH2) Hub to PCI bridge> at device 30.0 on pci0
pci3: <PCI bus> on pcib3
ahd0: <Adaptec 29320LP Ultra320 SCSI adapter> port
0x9400-0x94ff,0x9000-0x90ff m
em 0xf2020000-0xf2021fff irq 11 at device 0.0 on pci3
aic7901A: Ultra320 Wide Channel A, SCSI Id=7, PCI 33 or 66Mhz, 512 SCBs
pci3: <unknown card> (vendor=0x105a, dev=0x3373) at 3.0 irq 10
pci3: <ATI Mach64-GR graphics accelerator> at 7.0 irq 11
pci3: <unknown card> (vendor=0x8086, dev=0x1051) at 8.0 irq 5
isab0: <PCI to ISA bridge (vendor=8086 device=24d0)> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH5 ATA100 controller> port
0xf000-0xf00f,0-0x3,0-0x7,0-0x3,0-0
x7 irq 0 at device 31.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <unknown card> (vendor=0x8086, dev=0x24d3) at 31.3 irq 9
orm0: <Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xd17ff on isa0
pmtimer0 on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
ppc0: parallel port not found.
DUMMYNET initialized (011031)
IP packet filtering initialized, divert disabled, rule-based forwarding
enabled,
default to accept, logging limited to 100 packets/entry by default
Waiting 15 seconds for SCSI devices to settle
Mounting root from ufs:/dev/da0s1a
da0 at ahd0 bus 0 target 0 lun 0
da0: <SEAGATE ST336607LW 0007> Fixed Direct Access SCSI-3 device
da0: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged
Queueing Enabl
ed
da0: 35003MB (71687372 512 byte sectors: 255H 63S/T 4462C)
em0: Link is up 1000 Mbps Full Duplex
Limiting closed port RST response from 76352 to 200 packets per second
Limiting closed port RST response from 75963 to 200 packets per second
Limiting closed port RST response from 74737 to 200 packets per second
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