On Tue, Aug 23, 2005 at 02:32:36PM +0200, Jens Axboe wrote: > Hi, > > This is a little something I have played with. It allows you to see > exactly what is going on in the block layer for a given queue. Currently > it can logs request queueing and building, dispatches, requeues, and > completions.
Ah, fabulous. Thanks Jens! > + t.magic = BLK_IO_TRACE_MAGIC | BLK_IO_TRACE_VERSION; > + t.sequence = atomic_add_return(1, &bt->sequence); > + t.time = sched_clock() / 1000; Wouldn't it be better to pass out the highest precision available here & then do the conversion in userspace instead? I guess one might want that little bit more for a RAM disk or something ... actually, talking to one of the SGI people here with alot of experience on IRIX with a similar facility, the msec resolution there is apparently sometimes an issue already with fast storage. cheers. -- Nathan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
