[linux-audio-user] 2.6.18-rt5

        Hi.
        I have achieved booting a 2.6.18-rt5 on a dual Opteron X2
system. As I've just had the idea of disabling HPET with this version of
the patch, I can't say if it could work on an earlier version (it hanged
on all versions theretofore). HPET has always been activated in the kernel
I've compiled before.
        The config is there, it's only made for an AMD 8111 motherboard
with Sil SATA chipset, but IDE is activated without any need of initrd :
http://ypotin.nerim.net/myconfig
        Apparately, the rtc works better.
        This kind of messages (2.6.17.7) :

Sep 25 10:43:42 fairlight kernel: softirq-tasklet/20[CPU#1]: BUG in
__tasklet_action at kernel/softirq.c:493
Sep 25 10:43:42 fairlight kernel: [<c011e467>] __WARN_ON+0x67/0x90 (8)
Sep 25 10:43:42 fairlight kernel: [<c0122d0b>] __tasklet_action+0xeb/0xf0
(48)
Sep 25 10:43:42 fairlight kernel: [<c01234f6>] ksoftirqd+0xf6/0x1a0 (24)
Sep 25 10:43:42 fairlight kernel: [<c0123400>] ksoftirqd+0x0/0x1a0 (48)
Sep 25 10:43:42 fairlight kernel: [<c01318bb>] kthread+0xab/0xe0 (4)
Sep 25 10:43:42 fairlight kernel: [<c0131810>] kthread+0x0/0xe0 (12)
Sep 25 10:43:42 fairlight kernel: [<c0100e65>]
kernel_thread_helper+0x5/0x10 (1
6)

        And also that (I had tons of that) :

Sep 28 21:35:13 fairlight kernel: bug in rtc_read(): called in state
S_IDLE!
Sep 28 21:35:13 fairlight kernel: Read missed before next interrupt
Sep 28 21:35:48 fairlight kernel: bug in rtc_read(): called in state
S_IDLE!

        All this *seems* to have disappear, after three hours using the
kernel. The rtc have stopped saying « eek » sometimes in the logs.
        Instead, I have tons of this kind of things :

Sep 30 13:08:09 fairlight kernel: rtc: lost some interrupts at 1024Hz.
Sep 30 13:08:31 fairlight last message repeated 1899 times
Sep 30 13:09:01 fairlight kernel: 1024Hz.
Sep 30 13:09:01 fairlight kernel: rtc: lost some interrupts at 1024Hz.
Sep 30 13:09:16 fairlight last message repeated 1545 times
[...]
Sep 30 14:20:00 fairlight kernel: rtc: lost some interrupts at 1024Hz.
Sep 30 14:20:31 fairlight last message repeated 2346 times
Sep 30 14:21:32 fairlight last message repeated 3067 times
Sep 30 14:21:54 fairlight last message repeated 1148 times

         IRQ balancing is activated, and the litlle redhat's software for
that is installed and running. I have chosen to compile the enhanced rtc
in module, and have disabled its graphs because it flooded my logs without
any use for me.
        I have two questions :
        - Could someone tell me, more clearly than in the kernel help :),
what's the use of this HPET beast ?
        - Does it matter to disable it for real time audio purposes ?
        Thanks in advance for any enlightenment.
        Cheers,

Y.

P.S. : /proc/interrupts :

           CPU0 CPU1 CPU2 CPU3
  0: 3237178 3211763 3204014 3202106 IO-APIC
[........N/ 0]-edge timer
  6: 2 0 0 1 IO-APIC
[........./ 1]-edge floppy
  8: 0 0 0 0 IO-APIC
[........./ 0]-edge rtc
  9: 0 0 0 0 IO-APIC
[........./ 0]-level acpi
 14: 89780 107867 194304 1819 IO-APIC
[........./ 0]-edge ide0
 15: 31 0 1 1 IO-APIC
[........./ 0]-edge ide1
 16: 24128 57874 47830 32380 IO-APIC
[........./ 0]-level libata
 17: 27659 0 0 1 IO-APIC
[........./ 0]-level eth0
 18: 17715 30803 28025 12471 IO-APIC
[........./ 0]-level ohci_hcd:usb1, ohci_hcd:usb2, ohci1394
 19: 991430 1208684 744999 1458384 IO-APIC
[........./ 0]-level hdsp
NMI: 0 0 0 0
LOC: 18863126 17966846 18728772 17747659
ERR: 0
MIS: 0
Received on Sat Sep 30 16:15:04 2006