And another way try CONFIG_OMAP_32K_TIMER_HZ=1024 in your kernel CONFIG
2014-11-25 9:59 GMT+08:00 liyaoshi <liyao...@gmail.com>: > And if you really want the low latency instead of output throw > > > http://git.omapzoom.org/?p=kernel/omap.git;a=blob;f=drivers/tty/serial/omap-serial.c;h=f3aed1f4766742cac97419ff214577b58d19e01b;hb=7e6408234000c6526dae3f55c851adbcaae2d9ef#l1460 > > Try use lower fifo water marker , > > Try up->port.fifosize = 8; > > This might cause data overflow , No guarantee about this ,just try it > > > 2014-11-25 9:53 GMT+08:00 liyaoshi <liyao...@gmail.com>: > >> speed up to 921600bps or more if your remote uart can work >> >> 2014-11-24 19:17 GMT+08:00 Thomas O <skjor...@gmail.com>: >> >>> Hi all i am writing some software using the OMAP_SERIAL drivers to send >>> and receive data from a c program (TERMIOS). >>> >>> I am seeing large delays 10ms ticks when sending and receiving data on >>> the UARTS. >>> >>> In the normal linux driver there is a option called ASYNC_LOW_LATENCY. >>> When i am setting this flag via IOCTL i was expecting this latency to >>> drop. But it seems ti be ignored by the OMAP_SERIAL driver. >>> I have tried to set the option both via the following code snippet and >>> via the STTY command line interface. >>> >>> Any information on this or any way to get the latency down would be much >>> appreciated. >>> >>> /Thomas >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to beagleboard+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
