On 01/05/2015 08:52 AM, Vineet Gupta wrote: > On Monday 05 January 2015 07:04 PM, Peter Hurley wrote: >>> Also what do u think of the early IER optimization ? >> Seems ok except the commit changelog is wrong: IER is disabled twice per >> _line_. >> How did you profile it? It's ok if the answer is "seemed faster"; I'm just >> curious. > > Looking at the code yes this would be per line - but I vaguely remember > seeing it > for every char - this was when debugging a systemC model for 8250. Its been a > while... > I'd added prints in the model whenever IER would wiggle and it was just being > written with 0's again and again when in the early polling based printing > mode.
Maybe that was while running kgdb through serial8250_put_poll_char(), which is per-char. Regards, Peter Hurley -- 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/
