fxkl4...@protonmail.com wrote: > i have a video capture card with 4 separate chips > when i start up i get bttv0 - bttv3 > i'm getting a lot of errors in syslog on bttv2 and bttv3 > like > bttv: 2: timeout: drop=3888442 irq=27910652/28054718, risc=338f048c, bits: > HSYNC > bttv: 3: timeout: drop=3940265 irq=27929862/27929862, risc=33adc01c, bits: > HSYNC > > could it be related to interrupts and cpus > cat /proc/interrupts > CPU0 CPU1 CPU2 CPU3 > 16: 0 26950435 0 0 IO-APIC 16-fasteoi bttv1 > 17: 0 0 28079982 0 IO-APIC 17-fasteoi bttv2 > 18: 0 0 27950635 0 IO-APIC 18-fasteoi i801_smbus, > bttv3 > 19: 66003 0 0 0 IO-APIC 19-fasteoi bttv0 > > i notice bttv2 and bttv3 are on the same cpu > and bttv3 is sharing an interrupt > is this related to my timeout errors > if so is it correctable
Depending on the hardware -- I don't remember the ins and outs of most video capture cards these days -- you should be able to set the interrupt per card either in hardware or at kernel module load time. This could certainly be an issue, especially on a relatively low-powered machine; if you don't have the irqbalance daemon installed, you might try that first. -dsr-
