[mythtv-users] gt 240, fanless card .. issues
david.durham.jr at gmail.com
Tue Feb 2 15:46:25 UTC 2010
> Now that you are experiencing the fantastic CPU savings of vdpau, you
> may find that the cpu power saving configuration kicks in.
> With the CPU underutilised, the cpu speed drops to the lowest clock
> rate, and (depending on your mobo/chipset/cpu) this can also slow the
> bus (pci/pci-e/disk/memory etc).
> If you do experience stuttering, make sure you turn all power-saving
> modes off and retest. I personally
> have the cpu's drop to their lowest setting, while a friend finds
> stuttering when the cpu speed drops
> because their chipset also reduces (throttles?) PCI-E bandwidth.
Is this typically a bios setting?
Actually I do experience stuttering, but only from drives connected to
an external eSata enclosure (no problems with internal drives). Here
are what I think are the relevant specs:
04:00.0 RAID bus controller : Silicon Image, Inc. SiI 3132
Serial ATA Raid II Controller [1095:3132] (rev 01)
Subsystem: Silicon Image, Inc. Device [1095:7132]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at feaffc00 (64-bit, non-prefetchable) [size=128]
Region 2: Memory at feaf8000 (64-bit, non-prefetchable) [size=16K]
Region 4: I/O ports at dc00 [size=128]
Expansion ROM at fea00000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: sata_sil24
$ sudo hdparm -tT /dev/sdh
Timing cached reads: 7820 MB in 2.00 seconds = 3913.46 MB/sec
Timing buffered disk reads: 40 MB in 4.31 seconds = 9.27 MB/sec
Any suggestions about improving harddrive performance? Could be PCI-E
throttling if the internal drives aren't using that bus.
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