I assume you don't want to know the actual output (if you do let me know), but hexdump /dev/random gives a new line very slowly, perhaps once every 8 seconds or so.
On Wednesday, August 26, 2015 at 4:33:49 PM UTC-4, Stefan Karpinski wrote: > > Random guess... What happens when you try to read from /dev/random? > > On Aug 26, 2015, at 4:15 PM, Chris <[email protected] <javascript:>> > wrote: > > While julia is opening, it's pegged at around 99% CPU usage. It drops to > something very low after startup, though. > > On Wednesday, August 26, 2015 at 4:02:35 PM UTC-4, Elliot Saba wrote: >> >> Does `top` show that Julia is taking up a huge amount of CPU or memory? >> -E >> >> On Wed, Aug 26, 2015 at 11:49 AM, Chris <[email protected]> wrote: >> >>> That gives "/home/cbinz/julia/usr/bin/../lib/julia/sys.so" >>> >>> On Wednesday, August 26, 2015 at 2:47:06 PM UTC-4, Elliot Saba wrote: >>>> >>>> After Julia is loaded, run the following command and tell us what it >>>> prints out; it will give us the same information as what Yichao is talking >>>> about. >>>> >>>> filter( x -> contains(x, "sys.$(Sys.dlext)"), Sys.dllist()) >>>> -E >>>> >>>> On Wed, Aug 26, 2015 at 11:43 AM, Chris <[email protected]> wrote: >>>> >>>>> I have a sys.so in ~/julia/usr/lib/julia/, but I'm not sure how to run >>>>> fuser or lsof to do what you're asking. >>>>> >>>>> On Wednesday, August 26, 2015 at 2:32:32 PM UTC-4, Yichao Yu wrote: >>>>> >>>>>> On Wed, Aug 26, 2015 at 2:20 PM, Chris <[email protected]> wrote: >>>>>> > ipython is not installed, but `python` seems to run just fine. >>>>>> > >>>>>> > Nothing jumps out at me as taking very long with `strace julia`. >>>>>> >>>>>> Maybe do a lsof/fuser on the sys.so (should be in /usr/lib/julia/ or >>>>>> similar directory) to see if it is actually loaded by julia? (Or if >>>>>> it >>>>>> exists at all) >>>>>> >>>>>> > >>>>>> > On Wednesday, August 26, 2015 at 2:14:48 PM UTC-4, Elliot Saba >>>>>> wrote: >>>>>> >> >>>>>> >> Do other interpreters such as `ipython` run slowly? >>>>>> >> >>>>>> >> If you run `strace julia`, it will print out system calls as they >>>>>> execute. >>>>>> >> Are there certain syscalls that are taking a long amount of time? >>>>>> E.g. does >>>>>> >> it freeze for a long time on an lstat(), or a read(), or >>>>>> something? >>>>>> >> -E >>>>>> >> >>>>>> >> On Wed, Aug 26, 2015 at 11:09 AM, Chris <[email protected]> >>>>>> wrote: >>>>>> >>> >>>>>> >>> Nope, not NFS-mounted. >>>>>> >>> >>>>>> >>> >>>>>> >>> On Wednesday, August 26, 2015 at 2:07:14 PM UTC-4, John Gibson >>>>>> wrote: >>>>>> >>>> >>>>>> >>>> Run "df ~". That'll tell you where the file system containing >>>>>> your home >>>>>> >>>> directory is mounted. If it says "nfs:/...", it's NFS-mounted. >>>>>> >>>> >>>>>> >>>> John >>>>>> >>>> >>>>>> >>>> On Wednesday, August 26, 2015 at 11:12:48 AM UTC-4, Chris wrote: >>>>>> >>>>> >>>>>> >>>>> Hello, >>>>>> >>>>> >>>>>> >>>>> I recently got access to a new Linux machine, and I've been >>>>>> trying to >>>>>> >>>>> run some of my code there. I tried downloading a binary and >>>>>> using that, but >>>>>> >>>>> after I saw the performance issues, I built Julia from source, >>>>>> and the >>>>>> >>>>> issues persist. First: >>>>>> >>>>> >>>>>> >>>>> julia> @time versioninfo() >>>>>> >>>>> Julia Version 0.3.12-pre+5 >>>>>> >>>>> Commit 24138e7 (2015-08-20 17:19 UTC) >>>>>> >>>>> Platform Info: >>>>>> >>>>> System: Linux (x86_64-linux-gnu) >>>>>> >>>>> CPU: Intel(R) Xeon(R) CPU E5-4650 0 @ 2.70GHz >>>>>> >>>>> WORD_SIZE: 64 >>>>>> >>>>> BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY >>>>>> Sandybridge) >>>>>> >>>>> LAPACK: libopenblas >>>>>> >>>>> LIBM: libopenlibm >>>>>> >>>>> LLVM: libLLVM-3.3 >>>>>> >>>>> elapsed time: 40.533040322 seconds (142031648 bytes allocated, >>>>>> 2.89% gc >>>>>> >>>>> time) >>>>>> >>>>> >>>>>> >>>>> You can see that is quite a long time for the command to run >>>>>> (on my >>>>>> >>>>> Windows machine, it takes about 1.3 seconds). Startup itself is >>>>>> quite slow, >>>>>> >>>>> and even typing input immediately after startup is slow (the >>>>>> characters take >>>>>> >>>>> a few seconds just to show up). Loading a module that I use a >>>>>> lot on Windows >>>>>> >>>>> takes about 20 seconds, but loading that same module on the >>>>>> Linux machine >>>>>> >>>>> takes almost 9 minutes! >>>>>> >>>>> >>>>>> >>>>> Obviously something is wrong here, and I'm stumped. Any ideas? >>>>>> >>>>> >>>>>> >>>>> Thanks, >>>>>> >>>>> Chris >>>>>> >> >>>>>> >> >>>>>> > >>>>>> >>>>> >>>> >>
