Hello again,
I've done some experimenting with the issue and I think I have narrowed
the problem down a bit. The issue is partially introduced in Voyage
0.9.2 with the introduction of libata (see /proc/interrupts below). In
0.9.1. hires files play smoothly.
In solving this problem: I suppose there are two possible scenario's:
either fix the problem with libata or reverse to the legacy PATA
drivers. Where do I go to fix libata (code or configuration)? Else, how
do I reverse to the legacy drivers?
I hope anyone has some suggestions on either strategy.
Thanks in advance, Maarten
0.9.1
cat /proc/interrupts
CPU0
0: 290271 XT-PIC-XT-PIC timer
1: 0 XT-PIC-XT-PIC i8042
2: 0 XT-PIC-XT-PIC cascade
4: 556 XT-PIC-XT-PIC serial
11: 1828 XT-PIC-XT-PIC eth0
14: 6367 XT-PIC-XT-PIC ide0
15: 38 XT-PIC-XT-PIC ehci_hcd:usb1, ohci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 0 Local timer interrupts
SPU: 0 Spurious interrupts
PMI: 0 Performance monitoring interrupts
IWI: 0 IRQ work interrupts
RTR: 0 APIC ICR read retries
RES: 0 Rescheduling interrupts
CAL: 0 Function call interrupts
TLB: 0 TLB shootdowns
ERR: 0
MIS: 0
0.9.2
cat /proc/interrupts
CPU0
0: 16021039 XT-PIC-XT-PIC timer
1: 0 XT-PIC-XT-PIC i8042
2: 0 XT-PIC-XT-PIC cascade
4: 549 XT-PIC-XT-PIC serial
7: 3 XT-PIC-XT-PIC
11: 74406 XT-PIC-XT-PIC eth0
14: 74362 XT-PIC-XT-PIC pata_amd
15: 9406334 XT-PIC-XT-PIC pata_amd, ehci_hcd:usb1, ohci_hcd:usb2
NMI: 0 Non-maskable interrupts
LOC: 0 Local timer interrupts
SPU: 0 Spurious interrupts
PMI: 0 Performance monitoring interrupts
IWI: 0 IRQ work interrupts
RTR: 0 APIC ICR read retries
RES: 0 Rescheduling interrupts
CAL: 0 Function call interrupts
TLB: 0 TLB shootdowns
ERR: 3
MIS: 0
On 17/12/15 21:29, Muffinman wrote:
> Hello all,
>
> I've been running Voyage 0.10.0 for a while but unfortunately it doesn't
> run very smooth compared to 0.7.5. It's running on a Soekris net5501.
> With normal 44.1 files its running fine but with higher resolutions it
> stutters/distorts every few seconds or so, quite annoying.
>
> I've loaded 0.7.5 on the CF card of the 5501 and the main differences
> are in the load IRQ processes are creating.
>
> 5501: The following processes are producing a combined 15-20% cpu load
> depending on the resolution currently being played. In 0.7.5. these
> processes are not visible, so I'm not sure what that means.
> irq/15-ehci_hcd
> irq/15-ohci_
> irq/15-pata_amd_hcd
>
> However:
> - ksoftirq is also slightly elevated at 1.6 when running 0.10.0 compared
> to 0 on the 0.7.5.
> - The si line in 'top' seems also to be quite high (between 2 and 7)
> compared to when running 0.7.5 (between 0 and and occasional 0.3).
> - system load is also quite high
>
> It seems to me I have an irq problem, and the output of cat
> /proc/interrupts (see below) seems to give some confirmation. The pata
> and the usb irq's are shared in 0.10.0. This makes sense since the music
> files are locally stored and accessed through a pata interface.
>
> Anyone any ideas on how to fix this? Does anyone know what has changed
> between 0.7.5 and 0.10 that might have caused this change?
>
> Kind regards and thanks in advance, Maarten
>
> 0.7.5: cat /proc/interrupts
> CPU0
> 0: 2610959 XT-PIC-XT-PIC timer
> 1: 0 XT-PIC-XT-PIC i8042
> 2: 0 XT-PIC-XT-PIC cascade
> 3: 1 XT-PIC-XT-PIC
> 4: 273 XT-PIC-XT-PIC serial
> 7: 1 XT-PIC-XT-PIC
> 11: 41747 XT-PIC-XT-PIC eth0
> 14: 188673 XT-PIC-XT-PIC ide0
> 15: 3926610 XT-PIC-XT-PIC ehci_hcd:usb1, ohci_hcd:usb2
> NMI: 0 Non-maskable interrupts
> LOC: 0 Local timer interrupts
> SPU: 0 Spurious interrupts
> PMI: 0 Performance monitoring interrupts
> IWI: 0 IRQ work interrupts
> RES: 0 Rescheduling interrupts
> CAL: 0 Function call interrupts
> TLB: 0 TLB shootdowns
> ERR: 1
> MIS: 0
>
> 0.10.0: cat /proc/interrupts
> CPU0
> 0: 302642 XT-PIC-XT-PIC timer
> 1: 0 XT-PIC-XT-PIC i8042
> 2: 0 XT-PIC-XT-PIC cascade
> 4: 515 XT-PIC-XT-PIC serial
> 8: 1 XT-PIC-XT-PIC rtc0
> 11: 2473 XT-PIC-XT-PIC eth0
> 14: 11585 XT-PIC-XT-PIC pata_amd
> 15: 38 XT-PIC-XT-PIC pata_amd, ehci_hcd:usb1, ohci_hcd:usb2
> NMI: 0 Non-maskable interrupts
> LOC: 0 Local timer interrupts
> SPU: 0 Spurious interrupts
> PMI: 0 Performance monitoring interrupts
> IWI: 0 IRQ work interrupts
> RTR: 0 APIC ICR read retries
> RES: 0 Rescheduling interrupts
> CAL: 0 Function call interrupts
> TLB: 0 TLB shootdowns
> ERR: 0
> MIS: 0
>
>
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