I think I tracked it down. https://github.com/BrianGladman/flint/blob/trunk/gmpcompat.h
In there you see that `flint_mpz_set_si` is modified to work with GMP 6.2 I'm assuming this one is picked up from your system? `sage --standard | grep gmp` This code is not present yet in flint 2.5.2, which is installed from sage in your case, I guess: `sage --standard | grep flint` Hopefully this should resolve itself if you update to sage 9.3 (flint 2.6.3), because this flint does account for the changes made in GMP 6.2 Jonathan Freddie Manners schrieb am Samstag, 8. Mai 2021 um 00:25:52 UTC+2: > Dear all, > > Sorry for the delay getting back to you -- this was waiting in the > moderation queue for a bit (me being new) and then I dropped the ball. > > > run the underlying functions > > > > M = identity_matrix(n) > > L = M.list() > > MS = sage.matrix.matrix_space.MatrixSpace(GF(101), 1000, 1000, > sparse=False) > > mat = MS(L, coerce=True, copy=False) > > > > Maybe repeatedly running the first line causes leakage already? > > It appears that the first *two* lines cause the leak, whereas the first > line by itself does not. Not sure if that narrows it down, but possibly > strengthens the 31340 hypothesis below. > > > This might be a bug with flint. What flint are you using? > > To the best of my knowledge I don't have a system copy of flint, so > presumably I am using whatever is bundled in sage-9.2/upstream which seems > to be 2.5.2. > > > https://trac.sagemath.org/ticket/31340 > > I can confirm that the original code on that trac also memory leaks for my > system (31MB) so it could very plausibly be the same issue. I have not yet > read that bug in detail. > > Thanks for the feedback. > > Best > Freddie > On Wednesday, May 5, 2021 at 1:01:39 AM UTC-7 dim...@gmail.com wrote: > >> we've fixed a memory leak in matrices recently (this fix will be in >> 9.3), not sure if this is related >> https://trac.sagemath.org/ticket/31340 >> >> On Wed, May 5, 2021 at 8:45 AM 'jonatha...@googlemail.com' via >> sage-devel <sage-...@googlegroups.com> wrote: >> > >> > Dear Freddie, >> > >> > thank you for the report. >> > >> > Fortunatly or unfortunately, I can't reproduce this on sage 9.2 or on >> the develop branch (on ubuntu focal with libflint-2.5.2 and debian buster >> with sage's flint 2.6.3). >> > >> > This might be a bug with flint. What flint are you using? >> > >> > You can go into detail, to see, what exactly is causing the problem and >> instead of >> > >> > _ = identity_matrix(n).change_ring(GF(101)) >> > >> > run the underlying functions >> > >> > M = identity_matrix(n) >> > L = M.list() >> > MS = sage.matrix.matrix_space.MatrixSpace(GF(101), 1000, 1000, >> sparse=False) >> > mat = MS(L, coerce=True, copy=False) >> > >> > Maybe repeatedly running the first line causes leakage already? >> > >> > Jonathan >> > >> > Freddie Manners schrieb am Mittwoch, 5. Mai 2021 um 03:02:04 UTC+2: >> >> >> >> Dear all >> >> >> >> [I attempted to post this a few days ago but seemingly failed, so this >> is a repost; apologies if duplicate.] >> >> >> >> The following program appears to consume all the memory on my machine: >> >> >> >> n = 1000 >> >> for i in range(0, 1000000): >> >> _ = identity_matrix(n).change_ring(GF(101)) >> >> print(get_memory_usage()) >> >> >> >> I am running Sage 9.2 on a 64-bit gentoo linux box (kernel >> 5.4.97-gentoo, gcc version 10.2.0). >> >> >> >> I couldn't find any related open bugs. I have worked around the issue >> (solution: don't create intermediate integer matrices and then coerce them >> to finite fields; obviously it's less explicit in my original code) but >> either way this seems to be a new bug. >> >> >> >> Best >> >> Freddie >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "sage-devel" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an email to sage-devel+...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/sage-devel/6fd93c63-3fad-4d20-b624-3d3208d4ec4fn%40googlegroups.com. >> >> >> > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/94fd8faa-9f94-4300-968c-2801a885528en%40googlegroups.com.
