So using the read-only cache doesn't fix the problem. It's interesting in
that the compiler doesn't always handle doing so properly. Theoretically
declaring a pointer to be const __restrict__ should activate it. Well,
sort of, sometimes...
That said, using the "__ldg" intrinsic to load data works around the
problem. It looks like this, instead of x = *p, use x = __ldg(p)...
NVIDIA is taking a while to figure this out because the repro case runs for
3-10 hours before it occurs. The issues I already fixed take 10-60
minutes. Wish them luck! This is the sort of bug that drives an engineer
batty...
Scott
On Tue, Jun 11, 2013 at 4:38 AM, filip fratev <filipfratev.yahoo.com> wrote:
> Hi Scott,
> Thanks a lot also from me for your update!
>
> Regards,
> Filip
>
>
> ________________________________
> From: Marek Maly <marek.maly.ujep.cz>
> To: AMBER Mailing List <amber.ambermd.org>
> Sent: Tuesday, June 11, 2013 1:23 PM
> Subject: Re: [AMBER] experiences with EVGA GTX TITAN Superclocked -
> memtestG80 - UNDERclocking in Linux ?
>
>
> Hi Scott,
> thanks for update !
>
> It's good starting point that the NVIDIA guys were able
> to reproduce "cuFFT" errs on Titan GPU.
>
> Thanks also for your personal effort and let's hope
> that this issue will be resolved soon.
>
> M.
>
>
>
>
> Dne Tue, 11 Jun 2013 06:31:37 +0200 Scott Le Grand <varelse2005.gmail.com
> >
> napsal/-a:
>
> > So the issue is now reproed at NVIDIA and I'm playing with a GK110
> > feature
> > called the read-only data cache as an alternative to using the texture
> > unit
> > (the apparent root cause). It's a slightly different path through the
> > hw.
> > I doubt it will change anything, but it's worth a shot.
> >
> >
> >
> >
> > On Sun, Jun 9, 2013 at 8:22 AM, ET <sketchfoot.gmail.com> wrote:
> >
> >> Nice one Scott! Thanks for sorting this out! :)
> >>
> >>
> >> On 7 June 2013 23:50, Scott Le Grand <varelse2005.gmail.com> wrote:
> >>
> >> > All sorts of possible explanations: better binning, different ASICs,
> >> > different process, dumb luck, etc...
> >> >
> >> >
> >> >
> >> > On Fri, Jun 7, 2013 at 3:41 PM, filip fratev <filipfratev.yahoo.com>
> >> > wrote:
> >> >
> >> > > I am curious why GTX780 works, but Titan not..i.e. what might be the
> >> > > specific reason for cuFFT/Titan problem?
> >> > >
> >> > > Regards,
> >> > > F.
> >> > >
> >> > >
> >> > > ________________________________
> >> > > From: Scott Le Grand <varelse2005.gmail.com>
> >> > > To: AMBER Mailing List <amber.ambermd.org>
> >> > > Sent: Saturday, June 8, 2013 1:05 AM
> >> > > Subject: Re: [AMBER] experiences with EVGA GTX TITAN Superclocked -
> >> > > memtestG80 - UNDERclocking in Linux ?
> >> > >
> >> > >
> >> > > Jonathan: Oh ye of little faith...
> >> > >
> >> > > They just got the thing running at their end, give 'em a some time.
> >> > CuFFT
> >> > > is mission critical to CUDA - they'll fix it...
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > > On Fri, Jun 7, 2013 at 2:40 PM, Jonathan Gough
> >> > > <jonathan.d.gough.gmail.com>wrote:
> >> > >
> >> > > > I wonder if could i trade in my titan for a gtx 780...
> >> > > >
> >> > > >
> >> > > > On Fri, Jun 7, 2013 at 5:16 PM, Marek Maly <marek.maly.ujep.cz>
> >> wrote:
> >> > > >
> >> > > > > Thanks Scott for good news !
> >> > > > >
> >> > > > > Let's hope that guys from NVIDIA resolve
> >> > > > > the cuFFT/TITAN problem before the new
> >> > > > > chip architecture is released :))
> >> > > > >
> >> > > > > M.
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > > >
> >> > > > > Dne Fri, 07 Jun 2013 22:45:50 +0200 Scott Le Grand <
> >> > > > varelse2005.gmail.com>
> >> > > > > napsal/-a:
> >> > > > >
> >> > > > > > Really really interesting...
> >> > > > > >
> >> > > > > > I seem to have found a fix for the GB issues on my Titan -
> >> not so
> >> > > > > > surprisingly, it's the same fix as on GTX4xx/GTX5xx...
> >> > > > > >
> >> > > > > > But this doesn't yet explain the weirdness with cuFFT so we're
> >> not
> >> > > done
> >> > > > > > here yet...
> >> > > > > >
> >> > > > > >
> >> > > > > >
> >> > > > > > On Fri, Jun 7, 2013 at 12:48 PM, Jonathan Gough
> >> > > > > > <jonathan.d.gough.gmail.com>wrote:
> >> > > > > >
> >> > > > > >> Good News (maybe)
> >> > > > > >>
> >> > > > > >> 1. The nucleosome calculations were reproducible at
> >> > nstlim=100000
> >> > > > > >> 2. My new GTX 780 seems to be stable See results below
> >> > > > > >>
> >> > > > > >> CentOs 6
> >> > > > > >> gnu compilers
> >> > > > > >> Cuda 5.0 and Driver Version: 319.23
> >> > > > > >> AmberTools version 13.09
> >> > > > > >> Amber version 12.18
> >> > > > > >>
> >> > > > > >> EVGA 06G-P4-2793-KR GeForce GTX TITAN
> >> > > > > >> GB-Nucleosome
> >> > > > > >> nucleosome/1/mdout: Etot = -66858.7444 EKtot =
> >> > > 19709.4492
> >> > > > > >> EPtot = -86568.1936
> >> > > > > >> nucleosome/2/mdout: Etot = -66858.7444 EKtot =
> >> > > 19709.4492
> >> > > > > >> EPtot = -86568.1936
> >> > > > > >> nucleosome/3/mdout: Etot = -66858.7444 EKtot =
> >> > > 19709.4492
> >> > > > > >> EPtot = -86568.1936
> >> > > > > >> nucleosome/4/mdout: Etot = -66858.7444 EKtot =
> >> > > 19709.4492
> >> > > > > >> EPtot = -86568.1936
> >> > > > > >>
> >> > > > > >>
> >> > > > > >> FWIW: Here is data for GTX 780
> >> > > > > >> EVGA 03G-P4-2781-KR GeForce GTX 780
> >> > > > > >> Ran each of the tests at nstlim=100000 4x
> >> > > > > >>
> >> > > > > >> Not that I know if there was an issue, but paranoia has set
> >> in,
> >> > and
> >> > > I
> >> > > > > >> felt
> >> > > > > >> the need to be comprehensive
> >> > > > > >> Everything is looking reproducible.
> >> > > > > >>
> >> > > > > >> JAC_production_NPT/1/mdout: Etot = -58221.1921 EKtot
> >> =
> >> > > > > >> 14415.7754 EPtot = -72636.9675
> >> > > > > >> JAC_production_NPT/2/mdout: Etot = -58221.1921 EKtot
> >> =
> >> > > > > >> 14415.7754 EPtot = -72636.9675
> >> > > > > >> JAC_production_NPT/3/mdout: Etot = -58221.1921 EKtot
> >> =
> >> > > > > >> 14415.7754 EPtot = -72636.9675
> >> > > > > >> JAC_production_NPT/4/mdout: Etot = -58221.1921 EKtot
> >> =
> >> > > > > >> 14415.7754 EPtot = -72636.9675
> >> > > > > >>
> >> > > > > >> JAC_production_NVE/1/mdout: Etot = -58139.8773 EKtot
> >> =
> >> > > > > >> 14266.4307 EPtot = -72406.3079
> >> > > > > >> JAC_production_NVE/2/mdout: Etot = -58139.8773 EKtot
> >> =
> >> > > > > >> 14266.4307 EPtot = -72406.3079
> >> > > > > >> JAC_production_NVE/3/mdout: Etot = -58139.8773 EKtot
> >> =
> >> > > > > >> 14266.4307 EPtot = -72406.3079
> >> > > > > >> JAC_production_NVE/4/mdout: Etot = -58139.8773 EKtot
> >> =
> >> > > > > >> 14266.4307 EPtot = -72406.3079
> >> > > > > >>
> >> > > > > >> FactorIX_production_NVE/1/mdout: Etot = -234189.5802
> >> EKtot
> >> > =
> >> > > > > >> 54845.8359 EPtot = -289035.4162
> >> > > > > >> FactorIX_production_NVE/2/mdout: Etot = -234189.5802
> >> EKtot
> >> > =
> >> > > > > >> 54845.8359 EPtot = -289035.4162
> >> > > > > >> FactorIX_production_NVE/3/mdout: Etot = -234189.5802
> >> EKtot
> >> > =
> >> > > > > >> 54845.8359 EPtot = -289035.4162
> >> > > > > >> FactorIX_production_NVE/4/mdout: Etot = -234189.5802
> >> EKtot
> >> > =
> >> > > > > >> 54845.8359 EPtot = -289035.4162
> >> > > > > >>
> >> > > > > >> FactorIX_production_NPT/1/mdout: Etot = -234493.4304
> >> EKtot
> >> > =
> >> > > > > >> 55062.0156 EPtot = -289555.4460
> >> > > > > >> FactorIX_production_NPT/2/mdout: Etot = -234493.4304
> >> EKtot
> >> > =
> >> > > > > >> 55062.0156 EPtot = -289555.4460
> >> > > > > >> FactorIX_production_NPT/3/mdout: Etot = -234493.4304
> >> EKtot
> >> > =
> >> > > > > >> 55062.0156 EPtot = -289555.4460
> >> > > > > >> FactorIX_production_NPT/4/mdout: Etot = -234493.4304
> >> EKtot
> >> > =
> >> > > > > >> 55062.0156 EPtot = -289555.4460
> >> > > > > >>
> >> > > > > >>
> >> > > > > >> Cellulose_production_NPT/1/mdout: Etot = -441074.6000
> >> EKtot
> >> > =
> >> > > > > >> 258388.7500 EPtot = -699463.3500
> >> > > > > >> Cellulose_production_NPT/2/mdout: Etot = -441074.6000
> >> EKtot
> >> > =
> >> > > > > >> 258388.7500 EPtot = -699463.3500
> >> > > > > >> Cellulose_production_NPT/3/mdout:* *Etot = -441074.6000
> >> EKtot
> >> > > =
> >> > > > > >> 258388.7500 EPtot = -699463.3500
> >> > > > > >> Cellulose_production_NPT/4/mdout: Etot = -441074.6000
> >> EKtot
> >> > =
> >> > > > > >> 258388.7500 EPtot = -699463.3500
> >> > > > > >>
> >> > > > > >>
> >> > > > > >> Cellulose_production_NVE/1/mdout: Etot = -443246.3519
> >> EKtot
> >> > =
> >> > > > > >> 258074.3125 EPtot = -701320.6644
> >> > > > > >> Cellulose_production_NVE/2/mdout: Etot = -443246.3519
> >> EKtot
> >> > =
> >> > > > > >> 258074.3125 EPtot = -701320.6644
> >> > > > > >> Cellulose_production_NVE/3/mdout: Etot = -443246.3519
> >> EKtot
> >> > =
> >> > > > > >> 258074.3125 EPtot = -701320.6644
> >> > > > > >> Cellulose_production_NVE/4/mdout: Etot = -443246.3519
> >> EKtot
> >> > =
> >> > > > > >> 258074.3125 EPtot = -701320.6644
> >> > > > > >>
> >> > > > > >>
> >> > > > > >>
> >> > > > > >>
> >> > > > > >> On Thu, Jun 6, 2013 at 10:29 AM, Marek Maly
> >> <marek.maly.ujep.cz
> >> >
> >> > > > wrote:
> >> > > > > >>
> >> > > > > >> > OK, let us know your NUCLEOSOME results (this test will
> >> take
> >> > some
> >> > > > time
> >> > > > > >> > ...).
> >> > > > > >> >
> >> > > > > >> > M.
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> > Dne Thu, 06 Jun 2013 16:37:03 +0200 Jonathan Gough
> >> > > > > >> > <jonathan.d.gough.gmail.com> napsal/-a:
> >> > > > > >> >
> >> > > > > >> > > I have the:
> >> > > > > >> > > EVGA 06G-P4-2793-KR GeForce GTX TITAN SuperClocked
> >> Signature
> >> > 6GB
> >> > > > > >> 384-bit
> >> > > > > >> > > GDDR5 PCI Express 3.0 x16 HDCP, SLI Ready Video Card
> >> > > > > >> > >
> >> > > > > >> > > and the previously posted results were with bugfix 18.
> >> > Checking
> >> > > > GB
> >> > > > > >> > > nucleosome now
> >> > > > > >> > >
> >> > > > > >> > >
> >> > > > > >> > > On Thu, Jun 6, 2013 at 6:40 AM, Marek Maly <
> >> > marek.maly.ujep.cz>
> >> > > > > >> wrote:
> >> > > > > >> > >
> >> > > > > >> > >> Welcome in the club :))
> >> > > > > >> > >>
> >> > > > > >> > >> First of all do not panic. Scott recently identified and
> >> > > reported
> >> > > > > >> > >> some cuFFT "bug" in connection with Titans and sent it
> >> to
> >> > > NVIDIA,
> >> > > > > >> > >> now we have to wait what the NVIDIA experts answer.
> >> There
> >> is
> >> > > also
> >> > > > > >> > >> another
> >> > > > > >> > >> Amber/Titan issue
> >> > > > > >> > >> which has some another origin (GB of big systems i.e.
> >> > > NUCLEOSOME)
> >> > > > > >> you
> >> > > > > >> > >> may
> >> > > > > >> > >> try it
> >> > > > > >> > >> as well. Amber guys are working perhaps also on that.
> >> > > > > >> > >>
> >> > > > > >> > >> So on your place I would wait with RMAing unless you
> >> have
> >> any
> >> > > > other
> >> > > > > >> > >> indications
> >> > > > > >> > >> that your GPU might me damaged. In between you may do
> >> some
> >> > > tests
> >> > > > of
> >> > > > > >> this
> >> > > > > >> > >> GPU with memtestG80.
> >> > > > > >> > >>
> >> > > > > >> > >> here is the most recent version:
> >> > > > > >> > >>
> >> > > > > >> > >> ---
> >> > > > > >> > >> memtestG80
> >> > > > > >> > >> https://github.com/ihaque/memtestG80
> >> > > > > >> > >> here is the sync fix code
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> >
> >> > > > > >>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> https://github.com/ihaque/memtestG80/commit/c4336a69fff07945c322d6c7fc40b0b12341cc4c
> >> > > > > >> > >> ---
> >> > > > > >> > >>
> >> > > > > >> > >> BTW which Titan GPU are you using the stock one or the
> >> > > > superclocked
> >> > > > > >> one
> >> > > > > >> > >> ?
> >> > > > > >> > >>
> >> > > > > >> > >> Anyway I would recommend you to recompile Amber with the
> >> > > latests
> >> > > > > >> > >> Amber 12 patch (bugfix 18) if you did not do it.
> >> > > > > >> > >>
> >> > > > > >> > >> M.
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >> Dne Thu, 06 Jun 2013 12:01:35 +0200 Jonathan Gough
> >> > > > > >> > >> <jonathan.d.gough.gmail.com> napsal/-a:
> >> > > > > >> > >>
> >> > > > > >> > >> > Bad News.
> >> > > > > >> > >> >
> >> > > > > >> > >> > I ran each set of tests 4 times, nstlim=100000.
> >> FactorIX
> >> > was
> >> > > > the
> >> > > > > >> only
> >> > > > > >> > >> one
> >> > > > > >> > >> > that gave consistent results. Again I had a few that
> >> just
> >> > > died
> >> > > > > >> without
> >> > > > > >> > >> > any
> >> > > > > >> > >> > error messages.
> >> > > > > >> > >> >
> >> > > > > >> > >> > CentOs 6
> >> > > > > >> > >> > gnu compilers
> >> > > > > >> > >> > Cuda 5.0 and Driver Version: 319.23
> >> > > > > >> > >> > AmberTools version 13.09
> >> > > > > >> > >> > Amber version 12.18
> >> > > > > >> > >> >
> >> > > > > >> > >> > Cellulose_production_NVE/1/mdout: Etot =
> >> > -443246.3206EKtot
> >> > > > > >> =
> >> > > > > >> > >> > 258074.3438 EPtot = -701320.6644
> >> > > > > >> > >> > Cellulose_production_NVE/2/mdout Died at 4000 steps
> >> - no
> >> > > error
> >> > > > > >> > >> message.
> >> > > > > >> > >> > Cellulose_production_NVE/3/mdout: Etot =
> >> -443238.0345
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 257651.0625 EPtot = -700889.0970
> >> > > > > >> > >> > Cellulose_production_NVE/4/mdout: Etot =
> >> -443246.3206
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 258074.3438 EPtot = -701320.6644
> >> > > > > >> > >> >
> >> > > > > >> > >> > Cellulose_production_NPT/1/mdout: Etot =
> >> -441009.1612
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 257571.2031 EPtot = -698580.3643
> >> > > > > >> > >> > Cellulose_production_NPT/2/mdout: Etot =
> >> -440947.3717
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 257723.3750 EPtot = -698670.7467
> >> > > > > >> > >> > Cellulose_production_NPT/3/mdout: Etot =
> >> -441024.3259
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 257406.5781 EPtot = -698430.9041
> >> > > > > >> > >> > Cellulose_production_NPT/4/mdout: Etot =
> >> -440970.6005
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 257756.1250 EPtot = -698726.7255
> >> > > > > >> > >> >
> >> > > > > >> > >> > FactorIX_production_NVE/1/mdout: Etot =
> >> -234189.5802
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 54845.8359 EPtot = -289035.4162
> >> > > > > >> > >> > FactorIX_production_NVE/2/mdout: Etot =
> >> -234189.5802
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 54845.8359 EPtot = -289035.4162
> >> > > > > >> > >> > FactorIX_production_NVE/3/mdout: Etot =
> >> -234189.5802
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 54845.8359 EPtot = -289035.4162
> >> > > > > >> > >> > FactorIX_production_NVE/4/mdout: Etot =
> >> -234189.5802
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 54845.8359 EPtot = -289035.4162
> >> > > > > >> > >> >
> >> > > > > >> > >> > FactorIX_production_NPT/1/mdout: Etot =
> >> -234493.4304
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 55062.0156 EPtot = -289555.4460
> >> > > > > >> > >> > FactorIX_production_NPT/2/mdout: Etot =
> >> -234493.4304
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 55062.0156 EPtot = -289555.4460
> >> > > > > >> > >> > FactorIX_production_NPT/3/mdout: Etot =
> >> -234493.4304
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 55062.0156 EPtot = -289555.4460
> >> > > > > >> > >> > FactorIX_production_NPT/4/mdout: Etot =
> >> -234493.4304
> >> > > > > >> EKtot =
> >> > > > > >> > >> > 55062.0156 EPtot = -289555.4460
> >> > > > > >> > >> >
> >> > > > > >> > >> > JAC_production_NVE/1/mdout: Etot = -58141.0647
> >> EKtot
> >> > > =
> >> > > > > >> > >> > 14347.6699 EPtot = -72488.7346
> >> > > > > >> > >> > JAC_production_NVE/2/mdout: Etot = -58141.4961
> >> EKtot
> >> > > =
> >> > > > > >> > >> > 14320.1465 EPtot = -72461.6425
> >> > > > > >> > >> > JAC_production_NVE/3/mdout: Died at 48000 steps
> >> > > > > >> > >> > JAC_production_NVE/4/mdout: Etot = -58141.6938
> >> EKtot
> >> > > =
> >> > > > > >> > >> > 14257.2305 EPtot = -72398.9243
> >> > > > > >> > >> >
> >> > > > > >> > >> > JAC_production_NPT/1/mdout: Died at 78000 steps
> >> > > > > >> > >> > JAC_production_NPT/2/mdout: Etot = -58206.6103
> >> EKtot
> >> > > =
> >> > > > > >> > >> > 14384.7959 EPtot = -72591.4062
> >> > > > > >> > >> > JAC_production_NPT/3/mdout: Etot = -58211.2469
> >> EKtot
> >> > > =
> >> > > > > >> > >> > 14454.1592 EPtot = -72665.4061
> >> > > > > >> > >> > JAC_production_NPT/1/mdout: Died at 89000 steps
> >> > > > > >> > >> >
> >> > > > > >> > >> >
> >> > > > > >> > >> > Any recommendations on what to do? Send the card back?
> >> > Update
> >> > > > > >> drivers?
> >> > > > > >> > >> > Update Cuda?
> >> > > > > >> > >> >
> >> > > > > >> > >> >
> >> > > > > >> > >> >
> >> > > > > >> > >> >
> >> > > > > >> > >> > On Wed, Jun 5, 2013 at 6:45 PM, Marek Maly <
> >> > > marek.maly.ujep.cz
> >> > > > >
> >> > > > > >> > wrote:
> >> > > > > >> > >> >
> >> > > > > >> > >> >> Yes you got it,
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> one more thing. Check carefully the benchmark mdin
> >> files
> >> > and
> >> > > > > >> > >> >> if you see there "ig=-1" just delete this, to ensure,
> >> that
> >> > > > > >> > >> >> both runs of the given test will run using the same
> >> random
> >> > > > seed.
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> (As I remember I found it just in one or two tests,
> >> don't
> >> > > > > >> remember
> >> > > > > >> > >> which
> >> > > > > >> > >> >> one).
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> Let us know your results i.e. if all the tests (JAC
> >> > NVE/NPT,
> >> > > > > >> > >> FACTOR_IX
> >> > > > > >> > >> >> NVE/NPT etc.)
> >> > > > > >> > >> >> successfully finished all 100K steps (in both runs)
> >> and
> >> if
> >> > > > > >> moreover
> >> > > > > >> > >> the
> >> > > > > >> > >> >> results from both runs
> >> > > > > >> > >> >> are identical (just check the final energy).
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> In case of any error (writen in mdout file or in
> >> standard
> >> > > > output
> >> > > > > >> > >> (screen
> >> > > > > >> > >> >> or nohup.out ...) ), please report it here as well.
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> Thanks,
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> M.
> >> > > > > >> > >> >>
> >> > > > > >> > >> >>
> >> > > > > >> > >> >>
> >> > > > > >> > >> >>
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> Dne Thu, 06 Jun 2013 00:34:39 +0200 Jonathan Gough
> >> > > > > >> > >> >> <jonathan.d.gough.gmail.com> napsal/-a:
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> > I know I'm late in the game, but I have been
> >> reading
> >> > some
> >> > > of
> >> > > > > >> these
> >> > > > > >> > >> two
> >> > > > > >> > >> >> > Titan threads. I'm now attempting to test my 1
> >> Titan
> >> > card
> >> > > > > >> and I
> >> > > > > >> > >> want
> >> > > > > >> > >> >> to
> >> > > > > >> > >> >> > make sure I understand what I aught to be doing.
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > Download the Amber_GPU_Benchmark_Suite
> >> > > > > >> > >> >> > in mdin, change nstlim=100000
> >> > > > > >> > >> >> > and then run the 6 benchmarks at least 2 times each
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > yes?
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > The issue that we have had is that simulations
> >> would
> >> > just
> >> > > > > >> > >> prematurely
> >> > > > > >> > >> >> > stop.
> >> > > > > >> > >> >> > We didn't see any error messages in the mdout file
> >> > though,
> >> > > > > >> they
> >> > > > > >> > >> just
> >> > > > > >> > >> >> > stopped.
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > Were using Cuda 5.0 and Driver Version: 319.23
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > On Wed, Jun 5, 2013 at 1:29 PM, Marek Maly
> >> > > > > >> <marek.maly.ujep.cz>
> >> > > > > >> > >> wrote:
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> >> Hi Scott,
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> thanks for update ! Let's see what will be
> >> reaction
> >> > from
> >> > > > > >> NVIDIA.
> >> > > > > >> > >> >> >> In the worst case let's hope that also some other
> >> > > > > >> (NON-NVIDIA)
> >> > > > > >> > >> "GPU
> >> > > > > >> > >> >> FFT
> >> > > > > >> > >> >> >> library"
> >> > > > > >> > >> >> >> alternatives exists (to be compiled/used
> >> alternatively
> >> > > with
> >> > > > > >> > >> >> pmemd.cuda)
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> BTW I just found this perhaps interesting article
> >> (I
> >> > only
> >> > > > > >> list
> >> > > > > >> the
> >> > > > > >> > >> >> >> supplementary part. ):
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >>
> >> http://www.computer.org/csdl/trans/td/preprint/06470608-abs.html
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> OK, meanwhile I finished my experiment/tests with
> >> > > swapping
> >> > > > my
> >> > > > > >> two
> >> > > > > >> > >> >> titans
> >> > > > > >> > >> >> >> in slots. As you can see below it did not solve
> >> the
> >> > > > problems
> >> > > > > >> on
> >> > > > > >> my
> >> > > > > >> > >> >> >> "less stable" titan, but on the other hand there
> >> is
> >> > > > > >> significant
> >> > > > > >> > >> >> >> improvement.
> >> > > > > >> > >> >> >> I will now try with just "my less stable" GPU
> >> plugged
> >> > on
> >> > > > > >> > >> >> motherboard to
> >> > > > > >> > >> >> >> eventually confirm that it's less stability has
> >> origin
> >> > in
> >> > > > > >> it's
> >> > > > > >> > >> higher
> >> > > > > >> > >> >> >> sensitivity
> >> > > > > >> > >> >> >> to dual GPU configuration (OR just to dual GPU
> >> config
> >> > > with
> >> > > > > >> another
> >> > > > > >> > >> >> Titan
> >> > > > > >> > >> >> >> maybe that
> >> > > > > >> > >> >> >> with GTX 580/680 it will be OK or at least better
> >> than
> >> > > > with 2
> >> > > > > >> > >> >> Titans).
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> M.
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> SIMULTANEOUS TEST (BOTH GPUS) running at the same
> >> time
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> density (100K steps, NPT, restrained solute)
> >> > > > > >> > >> >> >> prod1 and prod2 (250K steps, NPT)
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> TITAN_0, TITAN_1 now rather identify PCI slots
> >> than
> >> > given
> >> > > > > >> cards.
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> all the errs I have obtained here is here just:
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> -----
> >> > > > > >> > >> >> >> cudaMemcpy GpuBuffer::Download failed unspecified
> >> > launch
> >> > > > > >> failure
> >> > > > > >> > >> >> >> -----
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> #1 ORIGINAL CONFIGURATION
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> density prod1 prod2
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> TITAN_0
> >> > > > > >> > >> >> >> -297755.2479 -299267.1086 65K
> >> > > > > >> > >> >> >> 20K -299411.2631 100K
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> TITAN_1
> >> > > > > >> > >> >> >> -297906.5447 -298657.3725 -298683.8965
> >> > > > > >> > >> >> >> -297906.5447 -298657.3725 -298683.8965
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> #2 AFTER GPU SWAPPING (respect to PCI slots)
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> density prod1 prod2
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> TITAN_0 (so these are results of the GPU named
> >> before
> >> > as
> >> > > > > >> TITAN_1)
> >> > > > > >> > >> >> >> -297906.5447 -298657.3725 -298683.8965
> >> > > > > >> > >> >> >> -297906.5447 -298657.3725 -298683.8965
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> TITAN_1 (so these are results of the GPU named
> >> before
> >> > as
> >> > > > > >> TITAN_0)
> >> > > > > >> > >> >> >> -297906.5447 240K -298764.5294
> >> > > > > >> > >> >> >> -297752.2836 -298997.8891 -299610.3812
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> Dne Wed, 05 Jun 2013 18:15:48 +0200 Scott Le Grand
> >> > > > > >> > >> >> >> <varelse2005.gmail.com>
> >> > > > > >> > >> >> >> napsal/-a:
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> > Filip,
> >> > > > > >> > >> >> >> > What's happening on Titan can take a while to
> >> > > trigger. I
> >> > > > > >> have
> >> > > > > >> > >> >> >> delivered
> >> > > > > >> > >> >> >> > a
> >> > > > > >> > >> >> >> > repro to NVIDIA that shows exactly what's
> >> happening
> >> > but
> >> > > > > >> it's
> >> > > > > >> up
> >> > > > > >> > >> to
> >> > > > > >> > >> >> >> them
> >> > > > > >> > >> >> >> > to
> >> > > > > >> > >> >> >> > explain why because its occurring inside cuFFT.
> >> > That's
> >> > > > why
> >> > > > > >> you
> >> > > > > >> > >> >> need
> >> > > > > >> > >> >> >> to
> >> > > > > >> > >> >> >> > run
> >> > > > > >> > >> >> >> > at least 100K iterations to see a single
> >> occurrence.
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> > There's a second issue that's happening with
> >> large
> >> GB
> >> > > > > >> > >> simulations,
> >> > > > > >> > >> >> but
> >> > > > > >> > >> >> >> > that
> >> > > > > >> > >> >> >> > one is even harder to trap. That doesn't mean
> >> it
> >> > isn't
> >> > > > > >> > >> happening,
> >> > > > > >> > >> >> >> just
> >> > > > > >> > >> >> >> > that it's on the very edge of doing so on Titan.
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> > Thankfully, I have not been able to trigger
> >> either
> >> > bug
> >> > > on
> >> > > > > >> GK104
> >> > > > > >> > >> or
> >> > > > > >> > >> >> >> K20...
> >> > > > > >> > >> >> >> > _______________________________________________
> >> > > > > >> > >> >> >> > AMBER mailing list
> >> > > > > >> > >> >> >> > AMBER.ambermd.org
> >> > > > > >> > >> >> >> > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> > __________ Informace od ESET NOD32 Antivirus,
> >> verze
> >> > > > > >> databaze
> >> > > > > >> > >> 8415
> >> > > > > >> > >> >> >> > (20130605) __________
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> > Tuto zpravu proveril ESET NOD32 Antivirus.
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> > http://www.eset.cz
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >> >
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> --
> >> > > > > >> > >> >> >> Tato zpráva byla vytvořena převratným poštovním
> >> > klientem
> >> > > > > >> Opery:
> >> > > > > >> > >> >> >> http://www.opera.com/mail/
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> >> _______________________________________________
> >> > > > > >> > >> >> >> AMBER mailing list
> >> > > > > >> > >> >> >> AMBER.ambermd.org
> >> > > > > >> > >> >> >> http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >> >> >>
> >> > > > > >> > >> >> > _______________________________________________
> >> > > > > >> > >> >> > AMBER mailing list
> >> > > > > >> > >> >> > AMBER.ambermd.org
> >> > > > > >> > >> >> > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > __________ Informace od ESET NOD32 Antivirus, verze
> >> > > databaze
> >> > > > > >> 8416
> >> > > > > >> > >> >> > (20130605) __________
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > Tuto zpravu proveril ESET NOD32 Antivirus.
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> > http://www.eset.cz
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >> >
> >> > > > > >> > >> >>
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> --
> >> > > > > >> > >> >> Tato zpráva byla vytvořena převratným poštovním
> >> klientem
> >> > > > Opery:
> >> > > > > >> > >> >> http://www.opera.com/mail/
> >> > > > > >> > >> >>
> >> > > > > >> > >> >> _______________________________________________
> >> > > > > >> > >> >> AMBER mailing list
> >> > > > > >> > >> >> AMBER.ambermd.org
> >> > > > > >> > >> >> http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >> >>
> >> > > > > >> > >> > _______________________________________________
> >> > > > > >> > >> > AMBER mailing list
> >> > > > > >> > >> > AMBER.ambermd.org
> >> > > > > >> > >> > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >> >
> >> > > > > >> > >> > __________ Informace od ESET NOD32 Antivirus, verze
> >> > databaze
> >> > > > 8417
> >> > > > > >> > >> > (20130606) __________
> >> > > > > >> > >> >
> >> > > > > >> > >> > Tuto zpravu proveril ESET NOD32 Antivirus.
> >> > > > > >> > >> >
> >> > > > > >> > >> > http://www.eset.cz
> >> > > > > >> > >> >
> >> > > > > >> > >> >
> >> > > > > >> > >> >
> >> > > > > >> > >>
> >> > > > > >> > >>
> >> > > > > >> > >> --
> >> > > > > >> > >> Tato zpráva byla vytvořena převratným poštovním klientem
> >> > Opery:
> >> > > > > >> > >> http://www.opera.com/mail/
> >> > > > > >> > >>
> >> > > > > >> > >> _______________________________________________
> >> > > > > >> > >> AMBER mailing list
> >> > > > > >> > >> AMBER.ambermd.org
> >> > > > > >> > >> http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >>
> >> > > > > >> > > _______________________________________________
> >> > > > > >> > > AMBER mailing list
> >> > > > > >> > > AMBER.ambermd.org
> >> > > > > >> > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> > >
> >> > > > > >> > > __________ Informace od ESET NOD32 Antivirus, verze
> >> databaze
> >> > > 8418
> >> > > > > >> > > (20130606) __________
> >> > > > > >> > >
> >> > > > > >> > > Tuto zpravu proveril ESET NOD32 Antivirus.
> >> > > > > >> > >
> >> > > > > >> > > http://www.eset.cz
> >> > > > > >> > >
> >> > > > > >> > >
> >> > > > > >> > >
> >> > > > > >> >
> >> > > > > >> >
> >> > > > > >> > --
> >> > > > > >> > Tato zpráva byla vytvořena převratným poštovním klientem
> >> Opery:
> >> > > > > >> > http://www.opera.com/mail/
> >> > > > > >> >
> >> > > > > >> > _______________________________________________
> >> > > > > >> > AMBER mailing list
> >> > > > > >> > AMBER.ambermd.org
> >> > > > > >> > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >> >
> >> > > > > >> _______________________________________________
> >> > > > > >> AMBER mailing list
> >> > > > > >> AMBER.ambermd.org
> >> > > > > >> http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >>
> >> > > > > > _______________________________________________
> >> > > > > > AMBER mailing list
> >> > > > > > AMBER.ambermd.org
> >> > > > > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > > >
> >> > > > > > __________ Informace od ESET NOD32 Antivirus, verze databaze
> >> 8423
> >> > > > > > (20130607) __________
> >> > > > > >
> >> > > > > > Tuto zpravu proveril ESET NOD32 Antivirus.
> >> > > > > >
> >> > > > > > http://www.eset.cz
> >> > > > > >
> >> > > > > >
> >> > > > > >
> >> > > > >
> >> > > > >
> >> > > > > --
> >> > > > > Tato zpráva byla vytvořena převratným poštovním klientem Opery:
> >> > > > > http://www.opera.com/mail/
> >> > > > >
> >> > > > > _______________________________________________
> >> > > > > AMBER mailing list
> >> > > > > AMBER.ambermd.org
> >> > > > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > > >
> >> > > > _______________________________________________
> >> > > > AMBER mailing list
> >> > > > AMBER.ambermd.org
> >> > > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > >
> >> > > _______________________________________________
> >> > > AMBER mailing list
> >> > > AMBER.ambermd.org
> >> > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > > _______________________________________________
> >> > > AMBER mailing list
> >> > > AMBER.ambermd.org
> >> > > http://lists.ambermd.org/mailman/listinfo/amber
> >> > >
> >> > _______________________________________________
> >> > AMBER mailing list
> >> > AMBER.ambermd.org
> >> > http://lists.ambermd.org/mailman/listinfo/amber
> >> >
> >> _______________________________________________
> >> AMBER mailing list
> >> AMBER.ambermd.org
> >> http://lists.ambermd.org/mailman/listinfo/amber
> >>
> > _______________________________________________
> > AMBER mailing list
> > AMBER.ambermd.org
> > http://lists.ambermd.org/mailman/listinfo/amber
> >
> > __________ Informace od ESET NOD32 Antivirus, verze databaze 8434
> > (20130610) __________
> >
> > Tuto zpravu proveril ESET NOD32 Antivirus.
> >
> > http://www.eset.cz
> >
> >
> >
>
>
> --
> Tato zpráva byla vytvořena převratným poštovním klientem Opery:
> http://www.opera.com/mail/
>
> _______________________________________________
> AMBER mailing list
> AMBER.ambermd.org
> http://lists.ambermd.org/mailman/listinfo/amber
> _______________________________________________
> AMBER mailing list
> AMBER.ambermd.org
> http://lists.ambermd.org/mailman/listinfo/amber
>
_______________________________________________
AMBER mailing list
AMBER.ambermd.org
http://lists.ambermd.org/mailman/listinfo/amber
Received on Wed Jun 12 2013 - 10:30:02 PDT
