I've programmed an RTDM PCI driver using interrupts. However, I've a few questions regarding the programming practices (especially because I'm not getting the performance I want).
1. The PCI system assigns an interrupt 177 which is totally outside the range 0..15 I'm used to. Is it ok to pass this value to rtdm_irq_request () ? 2. Is it obligatory to use a rtdm_toseq_t in rtdm_event_timedwait() and friends. Or, in other words, can I do rtdm_event_timedwait(&evt, 10000, NULL); ? 3. Currently, I register my ISR in the open() function. I unregister it in close(), after I've disabled the card's interrupt line. Nevertheless, I get a kernel message right after shutting down: irq 177: nobody cared (try booting with the "irqpoll" option) [<c013a18f>] __report_bad_irq+0x24/0x7f [<c013a26a>] note_interrupt+0x62/0xb8 [<c0139c70>] __do_IRQ+0xb7/0xc7 [<c010511b>] do_IRQ+0x53/0x8b ======================= [<c011c045>] profile_tick+0x20/0x49 [<c0114908>] __ipipe_sync_stage+0xf1/0x13a [<c011490d>] __ipipe_sync_stage+0xf6/0x13a [<c0115187>] __ipipe_handle_irq+0x233/0x24c [<c010104a>] default_idle+0x30/0x3b [<c010101a>] default_idle+0x0/0x3b [<c0103b30>] common_interrupt+0x18/0x30 [<c010101a>] default_idle+0x0/0x3b [<c010104a>] default_idle+0x30/0x3b [<c01010c2>] cpu_idle+0x3a/0x52 [<c0327785>] start_kernel+0x179/0x1df [<c0327330>] unknown_bootoption+0x0/0x1b6 handlers: [<f88ae638>] (snd_intel8x0_interrupt+0x0/0x23c [snd_intel8x0]) Disabling IRQ #177 After this message, it is impossible to reuse the interrupt line (after e.g. rmmod and insmod of driver and xeno_... modules) and the computer becomes very slow. Also note that I have traces of snd_intel8x0 appearing in this context. 4. How can I verify the status of running xenomai processes (and the driver). I would like to find out why I'm not meeting my interrupt deadlines. Thanks for any help, Jeroen. Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
