I'm still testing on linux. Akaros comes later :-) On Mon, Mar 28, 2016 at 2:59 PM Barret Rhoden <[email protected]> wrote:
> On 2016-03-28 at 21:46 ron minnich <[email protected]> wrote: > > https://github.com/akaros/fputest > > > > > > We're getting there. It's now using gcc intrinsics, which hopefully > > are more correct. Still trying to get sane timing for the "no op" > > case. > > i'd be concerned if the intrinsics are right and our own versions are > wrong. hopefully that won't be the case after this gets sorted out. > > > given that n = 1000000 and rdtsc alone takes O(30) ticks, you're > probably getting interference from the timer IRQ, even on Akaros Core 0. > here's two quick things to try: > > call uthread_mcp_init() somewhere in main. that'll make you an MCP. > it's a bit hacky. verify that it's working with a ps or pip. > > check your tsc overhead against __procinfo.timing_overhead or against > the console output during boot, e.g. > > TSC overhead (Min: 32, Max: 36) > > i didn't look at any of the actual FPU stuff for issues yet. > > barret > > -- > You received this message because you are subscribed to the Google Groups > "Akaros" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Akaros" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/d/optout.
