odd -CURRENT performance issue

Don Lewis truckman at FreeBSD.org
Mon Feb 7 23:49:09 GMT 2005 

I happened to try running
	time make all-depends-list
ten times in a row in /usr/ports/x11/gnome2.  The system was freshly
booted, and other than a niced setiathome, the system was idle.  I got
the following results:

      122.63 real        29.83 user        66.29 sys
      117.86 real        29.58 user        66.55 sys
      119.89 real        29.80 user        67.27 sys
      121.68 real        30.31 user        67.55 sys
      122.10 real        30.41 user        67.66 sys
      120.90 real        29.67 user        68.24 sys
      121.21 real        30.27 user        67.69 sys
      219.85 real        30.35 user       148.12 sys
      312.54 real        30.49 user       224.79 sys
      312.83 real        30.23 user       225.83 sys

The last three lines are rather strange ...

Kernel and world are 6.0-CURRENT, built from February 3rd sources.
WITNESS, INVARIANTS, DEBUG_VFS_LOCKS, and SMP enabled, and it is fairly
close to GENERIC.

Here's dmesg.boot:


Copyright (c) 1992-2005 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 6.0-CURRENT #290: Fri Feb  4 05:40:28 PST 2005
    dl at scratch.catspoiler.org:/usr/obj/usr/src/sys/GENERICSMB
WARNING: WITNESS option enabled, expect reduced performance.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Unknown CPU Type (2010.28-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x681  Stepping = 1
  Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
  AMD Features=0xc0400000<AMIE,DSP,3DNow!>
real memory  = 1073676288 (1023 MB)
avail memory = 1042026496 (993 MB)
ACPI APIC Table: <GBT    AWRDACPI>
ioapic0 <Version 1.1> irqs 0-23 on motherboard
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <GBT AWRDACPI> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0x6000-0x607f,0x5000-0x500f,0x4080-0x40ff,0x4000-0x407f,0xcf8-0xcff on acpi0
pci_link0: <ACPI PCI Link LNKA> irq 11 on acpi0
pci_link1: <ACPI PCI Link LNKB> on acpi0
pci_link2: <ACPI PCI Link LNKC> irq 10 on acpi0
pci_link3: <ACPI PCI Link LNKD> irq 5 on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <AMD 761 host to AGP bridge> port 0xc000-0xc003 mem 0xef020000-0xef020fff,0xe8000000-0xebffffff at device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 5.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C686B UDMA100 controller> port 0xc400-0xc40f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 7.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
uhci0: <VIA 83C572 USB controller> port 0xc800-0xc81f irq 5 at device 7.2 on pci0
uhci0: [GIANT-LOCKED]
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <VIA 83C572 USB controller> port 0xcc00-0xcc1f irq 5 at device 7.3 on pci0
uhci1: [GIANT-LOCKED]
usb1: <VIA 83C572 USB controller> on uhci1
usb1: USB revision 1.0
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
viapropm0: SMBus I/O base at 0x5000
viapropm0: <VIA VT82C686A Power Management Unit> port 0x5000-0x500f at device 7.4 on pci0
viapropm0: SMBus revision code 0x40
smbus0: <System Management Bus> on viapropm0
smb0: <SMBus generic I/O> on smbus0
pci0: <multimedia, audio> at device 7.5 (no driver attached)
fxp0: <Intel 82550 Pro/100 Ethernet> port 0xdc00-0xdc3f mem 0xef000000-0xef01ffff,0xef021000-0xef021fff irq 18 at device 10.0 on pci0
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: Ethernet address: 00:02:b3:5c:8c:e0
ahc0: <Adaptec 19160B Ultra160 SCSI adapter> port 0xe000-0xe0ff mem 0xef022000-0xef022fff irq 16 at device 12.0 on pci0
ahc0: [GIANT-LOCKED]
aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
fdc0: <floppy drive controller> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x30 on acpi0
sio0: type 16550A, console
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0: <ECP parallel printer port> port 0x778-0x77b,0x378-0x37f irq 7 drq 3 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/8 bytes threshold
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model VersaPad, device ID 0
pmtimer0 on isa0
orm0: <ISA Option ROM> at iomem 0xc0000-0xcc7ff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 2010280389 Hz quality 800
Timecounters tick every 1.000 msec
Waiting 3 seconds for SCSI devices to settle
acpi_cpu: throttling enabled, 2 steps (100% to 50.0%), currently 100.0%
da1 at ahc0 bus 0 target 1 lun 0
da1: <SEAGATE ST336737LW 0105> Fixed Direct Access SCSI-3 device 
da1: 160.000MB/s transfers (80.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da1: 35242MB (72176566 512 byte sectors: 255H 63S/T 4492C)
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST336706LW 010A> Fixed Direct Access SCSI-3 device 
da0: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da0: 35003MB (71687370 512 byte sectors: 255H 63S/T 4462C)
cd0 at ahc0 bus 0 target 6 lun 0
cd0: <NEC CD-ROM DRIVE:462 1.14> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present
Trying to mount root from ufs:/dev/da0s1a

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