Fortran Sigbus Bus Error Occurred
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Bus Error Linux
are hereHome › Forums › Intel® Software Development Products › Intel® Fortran Compiler bus error (core dumped) linux for Linux* and Mac OS X* FacebookLinkedInTwitterDiggDeliciousGoogle Plus forrtl: severe (180): SIGBUS, bus error occurred forrtl: severe (180): SIGBUS, bus error occurred how to debug bus error (name withheld) Tue, 06/27/2006 - 09:23 I have installed the intel fortran 9.1.024 on a Power Mac Pro with Intel Core Duo processor. I also have source code of NAG 19 fortran library coming from an old Alpha computer that I have compiled on this
Bus Error Core Dumped C
Mac computer using Intel Fortran. Now I an using this routine F02FAF (http://www.nag.co.uk/numeric/fl/manual19/pdf/F02/f02faf_fl19.pdf) that is noting else than a LAPACK routine. After the compilation of the codeI have the following message error: forrtl: severe (180): SIGBUS, bus error occurred It is important to mark, that the same program was working of my old laptop with a former version of the intel compiler and a linux distribution. Dario RSS Top 3 posts / 0 new Last post For more complete information about compiler optimizations, see our Optimization Notice. Tim P. Tue, 06/27/2006 - 14:26 This could require some detailed debugging. Among the possibilities are that the Core Duo fails immediately on faulty code which appears to run OK on other processors. I spent the time of several people on such a situation
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Bus Error (core Dumped) Centos
Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What is a bus error? up vote https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/268484 156 down vote favorite 49 What does the "bus error" message mean, and how does it differ from a segfault? c unix segmentation-fault bus-error share|improve this question edited Oct 18 '15 at 10:44 Cool Guy 15.7k51952 asked Oct 17 '08 at 14:48 raldi 7,252216178 add a comment| 15 Answers 15 active oldest votes up vote 151 down vote accepted Bus errors are rare nowadays on x86 and http://stackoverflow.com/questions/212466/what-is-a-bus-error occur when your processor cannot even attempt the memory access requested, typically: using a processor instruction with an address that does not satisfy its alignment requirements. Segmentation faults occur when accessing memory which does not belong to your process, they are very common and are typically the result of: using a pointer to something that was deallocated. using an uninitialized hence bogus pointer. using a null pointer. overflowing a buffer. PS: To be more precise this is not manipulating the pointer itself that will cause issues, it's accessing the memory it points to (dereferencing). share|improve this answer edited Oct 17 '08 at 15:18 answered Oct 17 '08 at 15:12 bltxd 5,72322336 52 They aren't rare; I'm just at Exercise 9 from How to Learn C the Hard Way and already encountered one... –11684 Mar 26 '13 at 20:12 5 Another cause of bus errors (on Linux anyway) is when the operating system can't back a virtual page with physical memory (e.g. low-memory conditions or out of huge pages when using huge page memory.) Typically mmap (and malloc) just reserve the virtual address space, and the kernel assigns the physical memory on demand (so called soft page faults
challenged and removed. (July 2015) (Learn how and when to remove this template message) In computing, a bus error is a fault raised by hardware, notifying an operating system (OS) that a process is https://en.wikipedia.org/wiki/Bus_error trying to access memory that the CPU cannot physically address: an invalid address http://computer-programming-forum.com/49-fortran/014f99a2d1c8e75a.htm for the address bus, hence the name. In modern use on most architectures these are much rarer than segmentation faults, which occur primarily due to memory access violations: problems in the logical address or permissions. On POSIX-compliant platforms, bus errors usually result in the SIGBUS signal being sent to the process that bus error caused the error. SIGBUS can also be caused by any general device fault that the computer detects, though a bus error rarely means that the computer hardware is physically broken—it is normally caused by a bug in a program's source code.[citation needed] Bus errors may also be raised for certain other paging errors; see below. Contents 1 Causes 1.1 Non-existent address 1.2 Unaligned access 1.3 Paging bus error in errors 2 Example 3 References Causes[edit] There are at least three main causes of bus errors: Non-existent address[edit] Software instructs the CPU to read or write a specific physical memory address. Accordingly, the CPU sets this physical address on its address bus and requests all other hardware connected to the CPU to respond with the results, if they answer for this specific address. If no other hardware responds, the CPU raises an exception, stating that the requested physical address is unrecognized by the whole computer system. Note that this only covers physical memory addresses. Trying to access an undefined virtual memory address is generally considered to be a segmentation fault rather than a bus error, though if the MMU is separate, the processor can't tell the difference. Unaligned access[edit] Most CPUs are byte-addressable, where each unique memory address refers to an 8-bit byte. Most CPUs can access individual bytes from each memory address, but they generally cannot access larger units (16 bits, 32 bits, 64 bits and so on) without these units being "aligned" to a specific boundary (the x86 platform being a notable exception). For example, if multi-byte accesses must be 16 bit-aligned, addres
my machine, but does not run properly. When I compile with the intel fortran compiler, I get the following error: forrtl: severe (180): SIGBUS, bus error occurred Stack trace terminated abnormally. When I compile with gfortran, I get the following error: "Bus error" I believe that the error lies somewhere in how I allocate the array "Y" and pass it to various subroutines. I will attach my code after this message. Any thoughts or assistance on the matter would be greatly appreciated. My warmest thanks, Alexander Pace Georgia Institute of Technology School of Aerospace Engineering. Code: program visc c use global allocatable Y(:,:) c.... enter number of subdivisions from n=0->4.8 numsubs= 100 c.... step size dn=4.8/numsubs c... define upper and lower bounds for y3(0) (xu and xl) xl=0 xu=2 c.... Start bisection method do while (xu-xl .gt. 0.000001) xm=(xu-xl)/2 c.... Perform Runge-Kutta Integrations to get values of y2(4.8) at top, c.... lower, and midpoint c allocate (Y(3,1000)) call runge(Y,xu,numsubs,dn) gu = Y(2,numsubs) - 1 call runge(Y,xl,numsubs,dn) gl = Y(2,numsubs) - 1 call runge(Y,xm,numsubs,dn) gm = Y(2,numsubs) - 1 c.... Check for location of root, change bounds if (gl*gm .lt. 0) then xu = xm else if (gl*gm .gt. 0) then xl = xm else if (gl*gm .eq. 0) then xl = xu endif end do print *, "y3(0)=", Y(3,1) end c.... This subroutine integrates the function y3 up one step, dn subroutine integratey3(y1i,y2i,y3i,y3n,dn) implicit double precision (a-h, o-z) g1= y2i**2-y1i*y3i-1 g2= (y2i+.5*g1)**2-(y1i+.5*g1)*(y3i+.5*g1)-1 g3= (y2i+.5*g2)**2-(y1i+.5*g2)*(y3i+.5*g2)-1 g4= (y2i+g3)**2-(y1i+g3)*(y3i+g3)-1 y3n= y3i+dn*(g1+2*g2+2*g3+g4)/6 return end c.... This subroutine integrates y2 up one step, dn subroutine integratey2(y2i,y3i,y2n,dn) implicit double precision (a-h, o-z) g1=y3i g2=y3i+.5*g1 g3=y3i+.5*g2 g4=y3i+g3 y2n= y2i+dn*(g1+2*g2+2*g3+g4)/6 return end c.... This subroutine integrates y1 up one step, dn subroutine integratey1(y1i,y2i,y1n,dn) implicit double precision (a-h, o-z) g1=y2i g2=y2i+.5*g1 g3=y2i+.5*g2 g4=y2i+g3 y1n= y1i+dn*(g1+2*g2+2*g3+g4)/6 re