oh heck. I'll find a better way to do this. ron
On Tue, Mar 29, 2016 at 3:23 PM Dan Cross <[email protected]> wrote: > So that it will run on Akaros as well. The call will fail (but emit a > diagnostic) and we'll still actually run. > > On Tue, Mar 29, 2016 at 6:15 PM, ron minnich <[email protected]> wrote: > >> Why would I want to not check the error? >> >> ron >> >> On Tue, Mar 29, 2016 at 2:57 PM Dan Cross <[email protected]> wrote: >> >>> Oh.... Well, here's another patch. :-) >>> >>> On Tue, Mar 29, 2016 at 5:55 PM, ron minnich <[email protected]> wrote: >>> >>>> I was only kidding anyway. I included it as another target :-) >>>> >>>> >>>> On Tue, Mar 29, 2016 at 2:48 PM Dan Cross <[email protected]> wrote: >>>> >>>>> Don't include that part, then; the rdtsc and rdtscp changes are what >>>>> you want. >>>>> >>>>> On Tue, Mar 29, 2016 at 5:46 PM, ron minnich <[email protected]> >>>>> wrote: >>>>> >>>>>> but this was not what we want :-) >>>>>> >>>>>> x86_64-ucb-akaros-gcc -Ofast -mfxsr -mxsave -mxsaveopt -o >>>>>> fputest fputest.c >>>>>> >>>>>> On Tue, Mar 29, 2016 at 2:42 PM Dan Cross <[email protected]> wrote: >>>>>> >>>>>>> FYI, please see attached patch. >>>>>>> >>>>>>> On Mon, Mar 28, 2016 at 6:32 PM, ron minnich <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> The timing is per-operation, not per total run. Even if we get one >>>>>>>> timer interrupt in there, it's going to be one bad data point. I'm fine >>>>>>>> with that. >>>>>>>> >>>>>>>> But, me, i'm only taking 128 samples. I think that's more the >>>>>>>> enough and it runs in maybe several dozen microseconds. >>>>>>>> >>>>>>>> ron >>>>>>>> >>>>>>>> On Mon, Mar 28, 2016 at 3:29 PM ron minnich <[email protected]> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> 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. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>>> 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. >>>>>> >>>>> >>>>> -- >>>>> 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. >>>> >>> >>> -- >>> 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. >> > > -- > 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. 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