Hello everyone. I am new to multi threading programming. Recently, i have a project, which i apply cilk_for into it. Here is the code:
the following simple code seems to run just fine, however, cilkscreen is shouting "Race condition"!
Shall I trust it? Or it is just false sharing?
So, what scalable memory allocator is fast and thread safe to use with intel cilk plus?
I condensed our project down to a piece of code that lets you reproduce the following issue.
When I compile this in Release configuration (Debug works), I get this compiler error:
1>------ Build started: Project: ng-gtest, Configuration: Release x64 ------
1>" : error : 010101_239
1> compilation aborted for General\CilkTest.cpp (code 4)
========== Build: 0 succeeded, 1 failed, 3 up-to-date, 0 skipped ==========
Is there any efficient prefix scan library for Cilk Plus accessible from C?
I was not able to find any and my implementation can hardly compete with the sequential version :-)
An interface similar to the reducers will work nicely.
I would like to understand better how Cilk scheduling works.
I am not sure how to phrase this question so I give it my best.
I have downloaded the latest Intel Cilk runtime release (cilkplus-rtl-003365 - released 3-May-2013).
I use the classical Fibonacci example in Cilk.
Hi everyone , I have a program that generating random number if it does not exist in ( allocated custom size) array then add array. But if custom size is very big ( 1 million ) after a period search is very slowing down. I did learn cilk_for and reducers.I want to paralleize but I could not decide what reducer is suitable for array. Is there someone who can help me ?
(Sorry for my english if you do not understand my problem you can write my e-mail " firstname.lastname@example.org " )
I read from the GCC 4.9.0 release notes that http://gcc.gnu.org/gcc-4.9/changes.html
Support for Cilk Plus has been added and can be enabled with the -fcilkplus option. Cilk Plus is an extension to the C and C++ languages to support data and task parallelism. The present implementation follows ABI version 1.2; all features but _Cilk_for have been implemented.
Recently, I have been compiling my Cilk plus program with GCC 4.9.0. Then I ran Cilk view to measure its parallelism and got this error:
Cilkview: Generating scalability data
Cilkview Scalability Analyzer V2.0.0, Build 3229
C:Tool (or Pin) caused signal 11 at PC 0x7f9124cd1dd3
Interestingly, when I compiled the program with GCC 4.8.2 and ran it with Cilk view again, it ran fine. So does it only happen with GCC 4.9.0? My guess is that GCC 4.9.0 isn't stable enough or not compatible with Cilk view at this time.