On Thu, May 11, 2017 at 11:03:40PM +0800, Junchang Wang wrote: > Hi Paul, > > Please check the updated patch. The first patch is to replace existing > ACCESS_ONCE to new READ/WRITE_ONCE primitives, and the second to protect global > share variable stopflag. > > BTW, I didn't see any performance differences between versions using volatile > and READ/WRITE_ONCE primitives on my 16 cores Intel machine. I guess the major > reason is that the sample code is simple such that registers are enough even if > keyword volatile is used. Very nice, sometimes we get lucky. ;-) Queue and pushed, thank you! Thanx, Paul > Junchang Wang (2): > count_stat_eventual: Switch from ACCESS_ONCE() to > READ_ONCE()/WRITE_ONCE() > count_stat_eventual: Add READ_ONCE() to protect global shared variable > stopflag > > CodeSamples/count/count_stat_eventual.c | 19 ++++++++++--------- > 1 file changed, 10 insertions(+), 9 deletions(-) > > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe perfbook" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe perfbook" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
