[2.5.54 + ACPI] Slow [Was: Re: [2.5.53] So sloowwwww......]

[Paul Rolland]

Hello,
> 
> Did you try using acpi=no-idle in your kernel append line (if using
> lilo) and see what difference that makes?  It works in 2.4.
> 
Followed your advice, and due to lack of documentation regarding
the acpi= kernel parameters, I tried :
 - acpi=no-idle
 - acpi=noidle
 - acpi=no_idle 
without success on a 2.5.54 kernel.

2.5.54 and ACPI (not only ACPI enumaration) is definitely slow.
Messages at boot :
Machine check exception polling timer started.
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz stepping 04
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
enabled ExtINT on CPU#0
ESR value before enabling vector: 00000000
ESR value after enabling vector: 00000000
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 pin1=2 pin2=0
testing the IO APIC.......................

 WARNING: unexpected IO-APIC, please mail
          to [e-mail]
.................................... done.
Using local APIC timer interrupts.
calibrating APIC timer ...
..... CPU clock speed is 2423.0564 MHz.
..... host bus clock speed is 134.0642 MHz.
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
mtrr: v2.0 (20020519)
PCI: PCI BIOS revision 2.10 entry at 0xf11a0, last bus=1
PCI: Using configuration type 1
BIO: pool of 256 setup, 14Kb (56 bytes/bio)
biovec pool[0]:   1 bvecs: 256 entries (12 bytes)
biovec pool[1]:   4 bvecs: 256 entries (48 bytes)
biovec pool[2]:  16 bvecs: 256 entries (192 bytes)
biovec pool[3]:  64 bvecs: 256 entries (768 bytes)
biovec pool[4]: 128 bvecs: 256 entries (1536 bytes)
biovec pool[5]: 256 bvecs: 256 entries (3072 bytes)
ACPI: Subsystem revision 20021217
    ACPI-0262: *** Info: GPE Block0 defined as GPE0 to GPE15
    ACPI-0262: *** Info: GPE Block1 defined as GPE16 to GPE31
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 6 7 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 *7 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15, enabled
at IRQ 9)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 11 12 14 15, enabled
at IRQ 9)
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 15, enabled
at IRQ 9)
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 11 12 14 15, enabled
at IRQ 9)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)

Paul ROlland, [e-mail]