[sage-support] Re: Parallel computation in Sage
PS: I don't know if `algorithm='padic'` would use a parallel computation. It would certainly make sense. Am Montag, 16. Juli 2018 18:08:07 UTC+2 schrieb Simon King: > > Hi Chandra, > > Am Montag, 16. Juli 2018 07:33:03 UTC+2 schrieb chandra chowdhury: >> >> I want to calculate the determinant of a large matrix >> with large entries. So it is taking time. In my machine, >> I have 32 CPUs. Is it possible in Sage to use all CPUs >> parallelly to find the determinant? >> > > You said in another post that you're working over the integers. So, you > could try a multi-modular approach. > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Parallel computation in Sage
Hi Chandra, Am Montag, 16. Juli 2018 07:33:03 UTC+2 schrieb chandra chowdhury: > > I want to calculate the determinant of a large matrix > with large entries. So it is taking time. In my machine, > I have 32 CPUs. Is it possible in Sage to use all CPUs > parallelly to find the determinant? > You said in another post that you're working over the integers. So, you could try a multi-modular approach. If M is your matrix over the integers, then the documentation of M.determinant tells you that you can use M.determinant(algorithm='padic', proof=True) (or proof=False). Example: sage: M = random_matrix(ZZ,1000) sage: %time d2 = M.determinant(algorithm='padic') CPU times: user 25.5 s, sys: 484 ms, total: 25.9 s Wall time: 26.1 s sage: M._cache.clear() sage: %time d3 = M.determinant() CPU times: user 10.2 s, sys: 0 ns, total: 10.2 s Wall time: 10.2 s sage: M._cache.clear() sage: %time d4 = M.determinant(algorithm='padic', proof=True) CPU times: user 25.6 s, sys: 464 ms, total: 26.1 s Wall time: 26.1 s sage: d2 == d3 == d4 True So, at least in this case, the multi modular algoirthm is slower than the default algorithm (which uses Flint). But perhaps it helps in your case. Best regards, Simon -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Parallel computation in Sage
Values are integers. On Monday, July 16, 2018 at 5:30:44 PM UTC+5:30, jori.ma...@uta.fi wrote: > > On Mon, 16 Jul 2018, chandra chowdhury wrote: > > > I want to calculate the determinant of a large matrix > > with large entries. So it is taking time. In my machine, > > I have 32 CPUs. Is it possible in Sage to use all CPUs > > parallelly to find the determinant? > > Are values real number or complex numbers, finite field elements...? > Symbolics? > > -- > Jori Mäntysalo -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Parallel computation in Sage
On Mon, 16 Jul 2018, chandra chowdhury wrote: I want to calculate the determinant of a large matrix with large entries. So it is taking time. In my machine, I have 32 CPUs. Is it possible in Sage to use all CPUs parallelly to find the determinant? Are values real number or complex numbers, finite field elements...? Symbolics? -- Jori Mäntysalo
