Thanks for the very clear explanation, Ian. I figured there was something like that. It turns out I was using a fifo badly (I was trying to model a sysfs attribute - clearly incorrectly as I now find out that poll should wait on POLLPRI for sysfs attributes). The original problem is now solved.
On Thu, 2016-09-15 at 20:07 -0700, Ian Lance Taylor wrote: > Opening a FIFO for reading blocks until some process opens the FIFO > for writing. So your program is not testing what you think it is > testing. In the case where you don't open the FIFO for writing, the > program simply blocks as os.Open before it ever calls poll. In the > case where you do write to the FIFO, the program blocks in Open until > the write, then records the time, runs poll which finds something to > read, and then prints the time it took to call poll. > > One way to fix this is to use > os.OpenFile(*path, os.O_RDONLY|syscall.O_NONBLOCK, 0) > > Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
