[mythtv-users] System Load/Performance Question
micha at kovoks.nl
Mon Feb 20 20:47:29 UTC 2006
Brian Wood schreef:
> I know the "can this system do <blank> has been done to death here,
> but I need some comparisons.
> The system is an amd64 3700, running Gentoo 2.6.15, MythTV
> 0.18.1,1.5GB RAM
amd64 3000+, Debian 2.6.15, MythTV 0.18.2, 1GB RAM here
> We are talking strictly about SDTV here.
> GeForce-5700 video card w/256MB.
GeForce-5200 / 128MB
> nVidia 7676 drivers, no XvMC, MythTV compiled with OpenGL support
> Recordings are going onto 2-250GB SATA drives configured Linux kernel
> software RAID0, JFS filesystem.
> Ring Buffer is going onto a UDMA 133 250GB single drive, JFS
> filesystem, no other drive on the IDE channel, The OS is on another
> partition of this drive.
Recordings and Ringbuffer on 1 250GB SATA drive JFS
With 1 remote frontend watching LiveTV: the load is 0.50, almost no CPU
With 1 local frontend watching LiveTV: the load jumps to 1.5,
mythfrontend taking 20% and X11 10% CPU usage.
1 local frontend watching LiveTV + 1 program beeing recorded: the load
jumps to 3 and LiveTV gets jerky now and then. The recording doesn't
have any problems. Still only a combined 30% CPU usage.
I do have the feeling the SATA gives some problems. But the strange
thing is that enabling XvMC brings the load back to acceptable values,
under 1 in almost all cases. But I really miss the option to user PiP then.
The drive is connected to a VIA Technologies, Inc. VIA VT6420 SATA RAID
I've found out that 2.6.15 is a bit better than the previous versions.
At the end... You're not alone, i think.
Met vriendelijke groet,
More information about the mythtv-users