kern/108954: 'sleep(1)' sleeps >1 seconds when speedstep (Cx) is in economy mode

Fri Feb 9 16:50:27 UTC 2007

The following reply was made to PR kern/108954; it has been noted by GNATS.

From: Brad Huntting <huntting at glarp.com>
To: Bruce Evans <bde at zeta.org.au>
Cc: Brad Huntting <huntting at glarp.com>, FreeBSD-gnats-submit at freebsd.org,
        freebsd-bugs at freebsd.org
Subject: Re: kern/108954: 'sleep(1)' sleeps >1 seconds when speedstep (Cx) is in economy mode 
Date: Fri, 09 Feb 2007 09:40:29 -0700

 > Do they work without the lapic timer?  (Not configuring "device apic"
 > is the only easy way to avoid using the lapic timer.  I forget if acpi
 > can work without apic.)  On some systems, the lapic timer doesn't work
 > at all because the CPU enters a deep sleep on the hlt instruction in
 > the idle process, and one workaround is to run other timers at a higher
 > frequency than the lapic timer frequency to kick the CPU out of its
 > deep sleep and thus keep the lapic timer interrupting.

 Yea!  Putting 'nodevice apic' in my kernel config appears to have
 fixed the over sleeping problem.

 ACPI seems to be happier as well.  For example I can now suspend
 the machine (acpiconf -s 3) and wake it up and the only things that
 dont come back are the display (neither in text mode nor running
 X) and the iwi wireless.  (It used to be _completely_ unresponsive).

 brad

 PS:  Here are the diffs in dmesg:  except for ioapic0 missing, all
 the diffs appear to be IRQ related.

 --- /tmp/olddmesg	Fri Feb  9 09:33:33 2007
 +++ /tmp/dmesg	Fri Feb  9 09:34:57 2007
 @@ -2,7 +2,7 @@
  Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
  	The Regents of the University of California. All rights reserved.
  FreeBSD is a registered trademark of The FreeBSD Foundation.
 -FreeBSD 6.2-STABLE #0: Wed Jan 24 19:25:21 MST 2007
 +FreeBSD 6.2-STABLE #1: Thu Feb  8 23:56:11 MST 2007
      root at studious.glarp.com:/usr/src/sys/i386/compile/STUDIOUS
  WARNING: MPSAFE network stack disabled, expect reduced performance.
  Timecounter "i8254" frequency 1193182 Hz quality 0
 @@ -13,9 +13,6 @@
    AMD Features=0x100000<NX>
  real memory  = 527302656 (502 MB)
  avail memory = 505974784 (482 MB)
 -ACPI APIC Table: <MATBIO CFW4-1  >
 -ioapic0: Changing APIC ID to 1
 -ioapic0 <Version 2.0> irqs 0-23 on motherboard
  kbd1 at kbdmux0
  acpi0: <PTLTD   RSDT> on motherboard
  acpi_bus_number: can't get _ADR
 @@ -36,21 +33,21 @@
  acpi_panasonic0: <Panasonic Notebook Hotkeys> on acpi0
  pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
  pci0: <ACPI PCI bus> on pcib0
 -acpi_video0: <ACPI video extension> port 0x1800-0x1807 mem 0xb0080000-0xb00fffff,0xc0000000-0xcfffffff,0xb0000000-0xb003ffff irq 16 at device 2.0 on pci0
 +acpi_video0: <ACPI video extension> port 0x1800-0x1807 mem 0xb0080000-0xb00fffff,0xc0000000-0xcfffffff,0xb0000000-0xb003ffff irq 11 at device 2.0 on pci0
  pci0: <display> at device 2.1 (no driver attached)
 -uhci0: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-A> port 0x1820-0x183f irq 23 at device 29.0 on pci0
 +uhci0: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-A> port 0x1820-0x183f irq 10 at device 29.0 on pci0
  uhci0: [GIANT-LOCKED]
  usb0: <Intel 82801FB/FR/FW/FRW (ICH6) 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 82801FB/FR/FW/FRW (ICH6) USB controller USB-B> port 0x1840-0x185f irq 19 at device 29.1 on pci0
 +uhci1: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-B> port 0x1840-0x185f irq 7 at device 29.1 on pci0
  uhci1: [GIANT-LOCKED]
  usb1: <Intel 82801FB/FR/FW/FRW (ICH6) 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
 -ehci0: <Intel 82801FB (ICH6) USB 2.0 controller> mem 0xb0040000-0xb00403ff irq 23 at device 29.7 on pci0
 +ehci0: <Intel 82801FB (ICH6) USB 2.0 controller> mem 0xb0040000-0xb00403ff irq 10 at device 29.7 on pci0
  ehci0: [GIANT-LOCKED]
  usb2: EHCI version 1.0
  usb2: companion controllers, 2 ports each: usb0 usb1
 @@ -60,20 +57,20 @@
  uhub2: 4 ports with 4 removable, self powered
  pcib1: <ACPI PCI-PCI bridge> at device 30.0 on pci0
  pci6: <ACPI PCI bus> on pcib1
 -rl0: <RealTek 8139 10/100BaseTX> port 0x3000-0x30ff mem 0xb0100000-0xb01000ff irq 19 at device 1.0 on pci6
 +rl0: <RealTek 8139 10/100BaseTX> port 0x3000-0x30ff mem 0xb0100000-0xb01000ff irq 7 at device 1.0 on pci6
  miibus0: <MII bus> on rl0
  rlphy0: <RealTek internal media interface> on miibus0
  rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
  rl0: Ethernet address: 00:0b:97:95:6a:73
  rl0: [GIANT-LOCKED]
 -iwi0: <Intel(R) PRO/Wireless 2915ABG> mem 0xb0101000-0xb0101fff irq 21 at device 4.0 on pci6
 +iwi0: <Intel(R) PRO/Wireless 2915ABG> mem 0xb0101000-0xb0101fff irq 5 at device 4.0 on pci6
  iwi0: Ethernet address: 00:12:f0:5e:b5:3c
  iwi0: [GIANT-LOCKED]
 -cbb0: <RF5C476 PCI-CardBus Bridge> mem 0xb0102000-0xb0102fff irq 22 at device 5.0 on pci6
 +cbb0: <RF5C476 PCI-CardBus Bridge> mem 0xb0102000-0xb0102fff irq 3 at device 5.0 on pci6
  cardbus0: <CardBus bus> on cbb0
  pccard0: <16-bit PCCard bus> on cbb0
  pci6: <base peripheral> at device 5.1 (no driver attached)
 -pcm0: <Intel ICH6 (82801FB)> port 0x1c00-0x1cff,0x18c0-0x18ff mem 0xb0040800-0xb00409ff,0xb0040400-0xb00404ff irq 17 at device 30.2 on pci0
 +pcm0: <Intel ICH6 (82801FB)> port 0x1c00-0x1cff,0x18c0-0x18ff mem 0xb0040800-0xb00409ff,0xb0040400-0xb00404ff irq 9 at device 30.2 on pci0
  pcm0: <SigmaTel STAC9750/51 AC97 Codec>
  pci0: <simple comms, generic modem> at device 30.3 (no driver attached)
  isab0: <PCI-ISA bridge> at device 31.0 on pci0
 @@ -81,7 +78,7 @@
  atapci0: <Intel ICH6 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1810-0x181f at device 31.1 on pci0
  ata0: <ATA channel 0> on atapci0
  ata1: <ATA channel 1> on atapci0
 -ichsmb0: <SMBus controller> port 0x18a0-0x18bf irq 19 at device 31.3 on pci0
 +ichsmb0: <SMBus controller> port 0x18a0-0x18bf irq 7 at device 31.3 on pci0
  ichsmb0: [GIANT-LOCKED]
  smbus0: <System Management Bus> on ichsmb0
  smb0: <SMBus generic I/O> on smbus0
 @@ -98,7 +95,7 @@
  sc0: <System console> at flags 0x100 on isa0
  sc0: VGA <16 virtual consoles, flags=0x300>
  vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
 -Timecounter "TSC" frequency 1197008625 Hz quality 800
 -Timecounters tick every 10.000 msec
 +Timecounter "TSC" frequency 1197008252 Hz quality 800
 +Timecounters tick every 1.000 msec
  ad0: 38154MB <TOSHIBA MK4025GASL SC104A> at ata0-master UDMA100
  Trying to mount root from ufs:/dev/ad0s1a