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  • Fedora distribution update pop-up after fresh installation

    - by Sayan Ghosh
    Hi, We do a kickstart installation of FC-10 at our place. I am quite intimidated by the distribution update pop up that comes up after the O/S installation. I want a keyword to put into the kickstart file that would stop Fedora from intimating with an update pop-up. Is it possible to include such a switch in the kickstart OR a script that could be added to post.bash? Thanks, Sayan

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  • Fedora distribution update pop-up after fresh installation

    - by Sayan Ghosh
    Hi, We do a kickstart installation of FC-10 at our place. I am quite intimidated by the distribution update pop up that comes up after the O/S installation. I want a keyword to put into the kickstart file that would stop Fedora from intimating with an update pop-up. Is it possible to include such a switch in the kickstart OR a script that could be added to post.bash? Thanks, Sayan

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  • Windows 7 setup location

    - by Sayan
    Hi, We have a computer that came pre-installed with Windows 7; we didn't receive an installation disk for that. How would one create a setup installer disk from a machine which has Windows 7? Thanks, Sayan

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  • OpenMP + SSE gives no speedup

    - by Sayan Ghosh
    Hi, My Professor found out this interesting experiment of 3D Linearly separable Kernel Convolution using SSE and OpenMP, and gave the task to me to benchmark the statistics on our system. The author claims a crazy 18 fold speedup from the serial approach! Might not be always, but we were expecting at least a 2-4 times speedup running this on a Dual Core Intel. http://software.intel.com/en-us/articles/16bit-3d-convolution-sse4openmp-implementation-on-penryn-cpu/#comment-41994 Alas, we could find exactly no speedup. The serial code performs always better, with or without OpenMP. I am using Linux, and observed a certain trend...when no other processes are running on the system, after a while the loadavg starts increasing, and the the %CPU utilization falls down. Another probable false positive which I ran into accidentally...I started the program, then immediately paused it. Then I ran it on background with bg, and saw a speedup of more than 2. This happens all the time! Any advice would be great. Thanks, Sayan

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  • Synchronisation construct inside pragma for

    - by Sayan Ghosh
    Hi, I have a program block like: for (iIndex1=0; iIndex1 < iSize; iIndex1++) { for (iIndex2=iIndex1+1; iIndex2 < iSize; iIndex2++) { iCount++; fDist =(*this)[iIndex1].distance( (*this)[iIndex2] ); m_oPDF.addPairDistance( fDist ); if ((bShowProgress) && (iCount % 1000000 == 0)) xyz_exception::ui()->progress( iCount, (size()-1)*((size()-1))/2 ); } } } } I have tried parallelising the inner and outer loop and by putting iCount in a critical region. What would be the best approach to parallelise this? If I wrap iCount with omp single or omp atomic then the code gives an error and I figured out that would be invalid inside omp for. I guess I am adding many extraneous stuffs to paralellise this. Need some advice... Thanks, Sayan

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  • How to edit doxygen.config from shell script?

    - by Sayan Ghosh
    Hi, I tried using Apple's shell script to automate doc set creation with every build (and loading that in XCode) - http://developer.apple.com/tools/creatingdocsetswithdoxygen.html but found that it had some bugs. Firstly it's not updating the entries in doxygen.config, perhaps one needs to put the settings in the exact hierarchy as it appears in the native doxygen file (?). My intention is to specify the settings in the following fashion in the shell script, and have a suitable config file generated tailored to my needs. ... echo "DOCSET_FEEDNAME = Some app" $TEMP_DIR/doxygen.config echo "GENERATE_LATEX = NO" $TEMP_DIR/doxygen.config echo "RECURSIVE = YES" $TEMP_DIR/doxygen.config ... Thank you, Sayan

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  • OpenMP - running things in parallel and some in sequence within them

    - by Sayan Ghosh
    Hi, I have a scenario like: for (i = 0; i < n; i++) { for (j = 0; j < m; j++) { for (k = 0; k < x; k++) { val = 2*i + j + 4*k if (val != 0) { for(t = 0; t < l; t++) { someFunction((i + t) + someFunction(j + t) + k*t) } } } } } Considering this is block A, Now I have two more similar blocks in my code. I want to put them in parallel, so I used OpenMP pragmas. However I am not able to parallelize it, because I am a tad confused that which variables would be shared and private in this case. If the function call in the inner loop was an operation like sum += x, then I could have added a reduction clause. In general, how would one approach parallelizing a code using OpenMP, when we there is a nested for loop, and then another inner for loop doing the main operation. I tried declaring a parallel region, and then simply putting pragma fors before the blocks, but definitely I am missing a point there! Thanks, Sayan

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  • Resolving File Permissions ERROR when moving files from one user to another

    - by Sayan
    I am creating a tarball from a bunch of files in one machine under my $USER - I have set execute permissions to all the files, but when I copy it over to another user in a different machine, there is an 'access permission denied error' when that user tries to access some of the files. I do not have root/sudo privileges. How would I resolve that? What are the rules to create universally distributable tarballs? Thanks.

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  • Dividing sections inside an omp parallel for : OpenMP

    - by Sayan Ghosh
    Hi, I have a situation like: #pragma omp parallel for private(i, j, k, val, p, l) for (i = 0; i < num1; i++) { for (j = 0; j < num2; j++) { for (k = 0; k < num3; k++) { val = m[i + j*somenum + k*2] if (val != 0) for (l = start; l <= end; l++) { someFunctionThatWritesIntoGlobalArray((i + l), j, k, (someFunctionThatGetsValueFromAnotherArray((i + l), j, k) * val)); } } } for (p = 0; p < num4; p++) { m[p] = 0; } } Thanks for reading, phew! Well I am noticing a very minor difference in the results (0.999967[omp] against 1[serial]), when I use the above (which is 3 times faster) against the serial implementation. Now I know I am doing a mistake here...especially the connection between loops is evident. Is it possible to parallelize this using omp sections? I tried some options like making shared(p) {doing this, I got correct values, as in the serial form}, but there was no speedup then. Any general advice on handling openmp pragmas over a slew of for loops would also be great for me!

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  • RODBC string getting truncated

    - by sayan dasgupta
    Hi all, I am fetching data from MySql Server into R using RODBC. So in one column of the database is a character vector SELECT MAX(CHAR_LENGTH(column)) FROM reqtable; RETURNS 26566 Now I will show you an example how I am running into the problem `library(RODBC) con <- odbcConnect("mysqlcon") rslts <- as.numeric(sqlQuery(con, "SELECT CHAR_LENGTH(column) FROM reqtable LIMIT 10", as.is=TRUE)[,1]) ` returns > rslts [1] 62 31 17 103 30 741 28 73 25 357 where as rslts <- nchar(as.character(sqlQuery(con, "SELECT column FROM reqtable LIMIT 10", as.is=TRUE)[,1])) returns > rslts [1] 62 31 17 103 30 255 28 73 25 255 So strings with length 255 is getting truncated at 255. Is there a way I can get the full string. Thanks

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