a...@ajay-desktop:~$ sage ---------------------------------------------------------------------- | Sage Version 3.2.3, Release Date: 2009-01-05 | | Type notebook() for the GUI, and license() for information. | ----------------------------------------------------------------------
********************************************************************** WARNING! This Sage install was built on a machine that supports instructions that are not available on this computer. Sage will likely fail with ILLEGAL INSTRUCTION errors! The following processor flags were on the build machine but are not on this computer: sse4_1 Email http://groups.google.com/group/sage-support for help. ********************************************************************** sage: prime_pi(10^10) 455052511 fir me its working..........., but i don't know why this error is showing. I've built sage from the source. On Thu, Mar 19, 2009 at 11:32 PM, William Stein <wst...@gmail.com> wrote: > > On Thu, Mar 19, 2009 at 10:10 AM, bix...@gmail.com <bix...@gmail.com> > wrote: > > > > Hi, > > > > I built sage from source and ran 'make test' on it. It failed on > > sage -t "devel/sage/sage/plot/plot.py" > > sage -t "devel/sage/sage/symbolic/function.pyx" > > sage -t "devel/sage/sage/rings/polynomial/multi_polynomial.pyx" > > sage -t "devel/sage/sage/functions/constants.py" > > though the build documentation suggested that it was normal to fail on > > a couple tests? > > > > When I launch the version I compiled from source, it didn't give me > > any warning about instruction sets. It appears to function exactly the > > same as the binary I downloaded, once I removed the sage-flags.txt > > file. So it seems that there is nothing wrong with the pre-built > > version, though someone might want to look into why it claims to > > require sse4_1 when it does not appear to need them (possibly it was > > compiled on a machine with sse4 so it automatically assumes it is > > needed? > > That's true. > > > ). Perhaps sse4 doesn't need to be listed in sage-flags.txt? > > I think that is true. In fact, I posted a patch to remove ssse4 from > the flag list. > > > As for William Stein's comment, I watched memory usage as it tried to > > compute pi(10^10), and it didn't rise noticeably before giving the seg > > fault (it also only took a moment). Even if it is a memory issue, > > doesn't sage have a more graceful and informative way to fail? > > One would hope. > > > I > > wonder how pi(x) is computed in sage, it it is simply referencing a > > pre-computed table of primes then perhaps the seg fault is an > > indication that it went past the end of the table? > > No -- in sage <= 3.4 it uses the PARI C library to *enumerate* all > primes up to x. > > > I looked at the entry in the tracker, what does prime_pi(k,40) do? I > > thought that prime_pi was a function of a single variable, and when I > > tried using it that way in sage it threw an error. > > > > Thank you both for your help, > > > > - Ryan > > > > On Mar 18, 3:20 pm, Johan Oudinet <johan.oudi...@gmail.com> wrote: > >> On Wed, Mar 18, 2009 at 4:20 PM, bix...@gmail.com <bix...@gmail.com> > wrote: > >> > >> > Hi, > >> > >> > After using version 3 for over a year, it finally occured to me I > >> > should upgrade. When trying to start version 3.4 I get: > >> > >> > ---------------------------------------------------------------------- > >> > | Sage Version 3.4, Release Date: 2009-03-11 | > >> > | Type notebook() for the GUI, and license() for information. | > >> > ---------------------------------------------------------------------- > >> > >> > ********************************************************************** > >> > WARNING! This Sage install was built on a machine that supports > >> > instructions that are not available on this computer. Sage will > >> > likely fail with ILLEGAL INSTRUCTION errors! The following processor > >> > flags were on the build machine but are not on this computer: > >> > >> > sse4_1 > >> > >> > Emailhttp://groups.google.com/group/sage-supportfor help. > >> > To remove this warning and make Sage start, just delete > >> > /home/bixbyr/Desktop/sage-3.4-linux-Ubuntu_8.10-i686-Linux/local/ > >> > lib/sage-flags.txt > >> > ********************************************************************** > >> > >> > I tried removing this file to see if sage will run correctly, it > >> > doesn't seem to. For a quick stress test I did > >> > sage: prime_pi(10^10) ... and got back > >> > /home/bixbyr/Desktop/sage-3.4-linux-Ubuntu_8.10-i686-Linux/local/bin/ > >> > sage-sage: line 197: 8689 Segmentation fault sage-ipython "$@" - > >> > i > >> > >> > It returns correctly for prime_pi(10^9), so although it's possible > >> > that the two errors are unrelated, that seems a strange way to fail if > >> > the issue were related to insufficient memory. > >> > >> > I downloaded sage-3.4-linux-Ubuntu_8.10-i686-Linux.tar.gz from the > >> > University of Washington mirror. I'm running ubuntu 8.10, kernel > >> > version 2.6.27-11-generic. I have 4gb of ram, though running a 32 bit > >> > kernel effectively limits me to ~3.2 gb. Since sse4 is a cpu > >> > instruction set (from what I understand), here it the output for cat / > >> > proc/cpuinfo: > >> > >> > processor : 0 > >> > vendor_id : GenuineIntel > >> > cpu family : 6 > >> > model : 15 > >> > model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz > >> > stepping : 11 > >> > cpu MHz : 1600.000 > >> > cache size : 4096 KB > >> > physical id : 0 > >> > siblings : 4 > >> > core id : 0 > >> > cpu cores : 4 > >> > apicid : 0 > >> > initial apicid : 0 > >> > fdiv_bug : no > >> > hlt_bug : no > >> > f00f_bug : no > >> > coma_bug : no > >> > fpu : yes > >> > fpu_exception : yes > >> > cpuid level : 10 > >> > wp : yes > >> > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > mca cmov > >> > pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm > >> > constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 > >> > ssse3 cx16 xtpr lahf_lm > >> > bogomips : 4799.97 > >> > clflush size : 64 > >> > power management: > >> > ( ... it then lists 3 more processors with the same information) > >> > >> > Although not the newest processor, it seems like this should be recent > >> > enough to run sage. I also tried installing the new version on my > >> > laptop, another ubuntu 8.10 system this time with a core 2 duo > >> > processor, and got the exact same error. > >> > >> > Any thoughts? Thanks a lot, > >> > >> Have you tried to build Sage from sources? If you also get the same > >> error, it will mean this is not an error related to your cpu > >> instruction set. > >> > >> -- > >> Johan > > > > > > > > > -- > William Stein > Associate Professor of Mathematics > University of Washington > http://wstein.org > > > > -- Ajay Rawat Kalpakkam, IGCAR ------------------------------------------------------------------------- Save Himalayas.... ------------------------------------------------------------------------- --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
