On 8/28/07, Iftikhar Burhanuddin <[EMAIL PROTECTED]> wrote: > Dear William, > > On Sun, 19 Aug 2007, William Stein wrote: > > On 8/19/07, Iftikhar Burhanuddin <[EMAIL PROTECTED]> wrote: > > > > There was a huge bug-squashing day today with many people at over > > > > 30 SAGE bugs fixed. The most interesting one whose fix turns out > > > > to be pretty important was one you had reported: > > > > http://www.sagemath.org:9002/sage_trac/ticket/274 > > > > So this will be fixed in sage-2.8.2. > > > > > > That's great news. Now I can get back to some long runs of > > > SupersingularModule computation. Thanks! > > > > Unfortunately there might be other memory leaks or bugs. But if > > you find them, definitely report them, as they will get fixed soon. > > The original code at > > http://www.sagemath.org:9002/sage_trac/ticket/274 > > {{{ > sage: get_memory_usage() > '276M' > sage: K = GF(10007^2, 'a') > sage: X = PolynomialRing(K, 'x').gen() > sage: for i in range(1000): > s = K.random_element(); t = K.random_element() > poly = s + t*X > ....: > sage: get_memory_usage() > '281M' > }}} > > now only leaks about 0.1MB, but extending the for loop range from 10**3 > to 10**5 leaks about 6.3MB! > > Also the following code > > {{{ > def Supercomp(): > p=ZZ(10**5).next_prime() > szfilename = "timings100k.txt" > mem_szfilename = "memory100k.txt" > while true: > t = cputime() > M = get_memory_usage() > X = SupersingularModule(p) > X.hecke_matrix(2) > f = open(szfilename, 'a') > f.write(str([p, cputime(t)]) + ", ") > f.close() > g = open(mem_szfilename, 'a') > g.write(str([p, get_memory_usage()-M]) + ", ") > g.close() > X.save('X' + str(p)) > p = ZZ(p).next_prime() > > Supercomp() > }}} > > had consumed 20% of memory on sage.math after a day of computation and I > had to kill it. > > === > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 24320 burhanud 39 19 12.2g 11g 15m R 100 18.9 1453:36 sage-ipython > === > > I'll have to spend some time to pin down where the leaks are.
Thanks, Ifti. I've made this trac #501: http://trac.sagemath.org/sage_trac/ticket/501 > Regards, > Ifti > > -- William Stein Associate Professor of Mathematics University of Washington http://www.williamstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://sage.scipy.org/sage/ and http://modular.math.washington.edu/sage/ -~----------~----~----~----~------~----~------~--~---
