[mythtv-users] mythcomflag - how do I set nice level?
Roman Romaniuk
roman.romaniuk at canada.com
Fri Sep 23 20:55:53 UTC 2005
>On 9/23/05, Ryan Steffes <rbsteffes at gmail.com> wrote:
>>
>>
>> > >
>> > They do not appear to be.
>> >
>> > ivtv0 = 22
>> > ivtv1 = 17
>> > eth0 = 20
>> >
>> > However ivtv1 is sharing with some part fo the chipset:
>> >
>> > dragonfly ~ # cat /proc/interrupts
>> > CPU0
>> > 0: 14871236 IO-APIC-edge timer
>> > 1: 23821 IO-APIC-edge i8042
>> > 9: 0 IO-APIC-level acpi
>> > 12: 308115 IO-APIC-edge i8042
>> > 14: 187334 IO-APIC-edge ide0
>> > 15: 49 IO-APIC-edge ide1
>> > 16: 485287 IO-APIC-level uhci_hcd:usb2, uhci_hcd:usb5,
>> > i915 at pci:0000:00:02.0
>> > 17: 57811 IO-APIC-level ivtv1, Intel ICH5
>> > 18: 109 IO-APIC-level uhci_hcd:usb4
>> > 19: 174 IO-APIC-level uhci_hcd:usb3
>> > 20: 8034881 IO-APIC-level eth0
>> > 22: 38977 IO-APIC-level ivtv0
>> > 23: 4 IO-APIC-level ehci_hcd:usb1
>> > NMI: 0
>> > LOC: 14872124
>> > ERR: 0
>> > MIS: 0
>> > dragonfly ~ #
>> >
>>
>>
>> I was having a very similiar problem, which is why I asked. For me, it
>> wasn't just failing though it was resulting in lock ups. The solution
wa>s
>> to turn off APIC in the BIOS and it's been hunky dory since.
>>
>
>As a test I jsut switched video storage to my local drive and ran a 30
>minute test run recording two programs. Both programs came out 29:55
>second, basically perfect.
>
>One difference I noted was while running this test top said that I was
>98% idle. Sounds great. While running an identical 30 minute test
>storing on my NFS drive top said I was 98% 'waiting'.
>
>I think my problem resides somewhere in the NFS system. I also note
>looking at the output of ifconfig that both the backend side and the
>NFS server are logging thousand up thousand 'collisions'. I need to
>fix that next.
>
>Thanks,
>Mark
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>
>
NFS works very well for reading, not so well for writing. NFS absolutely
insists (for a whole bunch of valid reasons) on commiting the data to disk
before returning, resulting in very poor write performance as there is no
buffering. Your best bet is writing to a local hard disk.
Cheers,
Roman
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