Re: Re: Re: Kernel Timeout
- To: mathgroup at smc.vnet.net
- Subject: [mg43127] Re: [mg43097] Re: [mg42954] Re: Kernel Timeout
- From: William K Reinholtz <kirk.reinholtz at jpl.nasa.gov>
- Date: Wed, 13 Aug 2003 07:49:57 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Perhaps you should use the OS to do this, rather than Mathematica. For example, on unix, solaris, linux, os x, etc it would be very easy to create a cron job that would kill any kernel that hasn't been used for a certain period of time, or that has exceeded some time limit, or pretty much whatever you can imagine. On Tuesday, Aug 12, 2003, at 01:43 US/Pacific, T.Srinivas Kumar wrote: > Hi Allan, > > Thank you for your help. > > But I am looking at utilising the total number of licenses(Kernels) > that I have. For example, if I have 5 Kernel processes, then is there > an option where if a user is sitting idle or the Kernel is not being > utilized for a period of time, can we kill these kernels automatically > OR start Kernels giving a time-period after which they get killed so > that all the users in the network can utilise the total number of > Kernel processes. > > Thank you for your help. > > Regards > T.S.Kumar > > > > ----- Original Message ----- > From: "Allan Hayes" <hay at haystack.demon.co.uk> To: mathgroup at smc.vnet.net > To: mathgroup at smc.vnet.net > Subject: [mg43127] [mg43097] [mg42954] Re: Kernel Timeout > > > "T.Srinivas Kumar" <tskumar at india.com> wrote in message > news:bgfseh$lld$1 at smc.vnet.net... >> Hello, >> >> How can one can set a timeout period for the Mathematica Kernel. I >> mean, > can we launch Kernel from Mathematica Frontend with a timeout period, > may be > for 10 seconds so that it gets killed/stopped after 10 seconds? I > should > also be able to do my computations within Mathematica within this 10 > seconds. >> >> Please let me know the procedure if this is possible. >> >> Regards >> T.Srinivas Kumar >> -- >> ______________________________________________ >> http://www.india.com >> Now with POP3/SMTP access for only US$14.95/yr >> >> Powered by Outblaze >> > > For individual inputs > > Evaluating > > ?*Time* > > gives all commands including Time. > > Amongst these we find TimeConstrained, which can be used as follows. > > In[1]:= > TimeConstrained[Integrate[Sin[x^5 + x^3], x], .0001, "Out of time"] > Out[1]= > Out of time > > To have this happen automatically for all inputs we can use > > In[2]:= > $Pre = Function[x, TimeConstrained[x, .0001, "Out of time"], > HoldAll]; > > Example: > In[3]:= > Integrate[Sin[x^5 + x^4], x] > Out[3]= > Out of time > > We can cancel $Pre > In[4]:= > $Pre =. > > -- > Allan > --------------- > Allan Hayes > hay at haystack.demon.co.uk > Voice: +44 (0)116 241 8747 > Fax: +44 (0)870 164 0565 > > > > > > > > > -- > ______________________________________________ > http://www.india.com > Now with POP3/SMTP access for only US$14.95/yr > > Powered by Outblaze >