em0, polling performance, P4 2.8ghz FSB 800mhz

From: Deepak Jain (deepak_at_ai.net)
Date: 02/29/04

  • Next message: Don Bowman: "RE: em0, polling performance, P4 2.8ghz FSB 800mhz" 
    Date: Sat, 28 Feb 2004 21:02:11 -0500
To: freebsd-hackers@freebsd.org

    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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  • Next message: Don Bowman: "RE: em0, polling performance, P4 2.8ghz FSB 800mhz"

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