Bus Error In Cell Be
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Broadband Engine Architecture forum > Topic: Bus error while transferring 512 bytes 4 replies Latest Post - 2011-06-15T11:59:28Z by SystemAdmin Display:ConversationsBy Date 1-5 of 5 Previous Next sreejeshs 27000495ME 2 Posts Pinned topic Bus error while transferring 512 bytes 2011-06-08T09:41:39Z | bus error 10 Tags: Answered question This question has been answered. Unanswered question This question has not bus error c++ been answered yet. Hi, I am new to cell programming. I am trying to transfer 512 bytes of data to spe
Bus Error Linux
from ppu using DMA.But I am getting bus error. It works fine with 128 bytes, 64 bytes etc. Please help me. Log in to reply. Updated on 2011-06-15T11:59:28Z at 2011-06-15T11:59:28Z by SystemAdmin jadamcze 060000NGAR 219
Bus Error Core Dumped
Posts Re: Bus error while transferring 512 bytes 2011-06-08T09:58:24Z This is the accepted answer. This is the accepted answer. Probably an alignment error, but hard to say for certain without being able to see the code that's causing the problem. Log in to reply. SystemAdmin 110000D4XK 10114 Posts Re: Bus error while transferring 512 bytes 2011-06-08T12:56:51Z This is the accepted answer. This is the accepted answer. For bus error 10 mac a guide on debugging DMA errors, see "Chapter 4. Debugging common Direct Memory Access (DMA)errors" in the Cell Broadband Engine Programmers Guides. If you have installed the documentation on your system, this document can be found in /opt/cell/sdk/docs/programming/CBE_Programmers_Guide.pdf. Log in to reply. sreejeshs 27000495ME 2 Posts Re: Bus error while transferring 512 bytes 2011-06-15T04:47:28Z This is the accepted answer. This is the accepted answer. jadamcze 060000NGAR 2011-06-08T09:58:24Z Probably an alignment error, but hard to say for certain without being able to see the code that's causing the problem. More... Yea thank you. There was an alignment problem. I have one more doubt regarding this. What should I do if I want to transfer address, which is not aligned of 16bytes? For example i want to transfer 500 bytes to SPE using DMA? Should I want want to pad zeros to make it 16 byte aligned? Log in to reply. SystemAdmin 110000D4XK 10114 Posts Re: Bus error while transferring 512 bytes 2011-06-15T11:59:28Z This is the accepted answer. This is the accepted answer. sreejeshs 27000495ME 2011-06-15T04:47:28Z Yea thank you. There was an alignment problem. I have one more doubt regarding this. What should I do if I want to transfer address, which is not aligned of 16bytes?
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Fortran Bus Error
or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x python bus error Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it bus error (core dumped) ubuntu only takes a minute: Sign up What is a bus error? up vote 155 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 https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014625556 edited Oct 18 '15 at 10:44 Cool Guy 15.8k51952 asked Oct 17 '08 at 14:48 raldi 7,239216178 add a comment| 15 Answers 15 active oldest votes up vote 150 down vote accepted Bus errors are rare nowadays on x86 and 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 http://stackoverflow.com/questions/212466/what-is-a-bus-error 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 5,70322336 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.) Make a large enough malloc, and then write to enough of it and you'll get a bus error. –Eloff Jul 14 '15 at 0:09 add a comment| up vote 55 down vote A segfault is accessing memory that you're not allowed to access. It's read-only, you don't have permission, etc... A bus error is trying to access memory that can't possibly be there. You've used an address that's meaningless to the system, or the wrong kind of address for that o
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business http://stackoverflow.com/questions/838540/bus-error-vs-segmentation-fault Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack 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 Bus error vs Segmentation fault up vote 25 down vote favorite 8 Difference between a bus error and a segmentation fault? Can it happen bus error that a program gives a seg fault and stops for the first time and for the second time it may give a bus error and exit ? c share|improve this question edited May 2 '12 at 12:04 casperOne 58k10126202 asked May 8 '09 at 6:56 Thunderboltz 6253915 add a comment| 6 Answers 6 active oldest votes up vote 34 down vote accepted On most architectures I've used, the distinction is that: a SEGV is caused bus error 10 when you access memory you're not meant to (e.g., outside of your address space). a SIGBUS is caused due to alignment issues with the CPU (e.g., trying to read a long from an address which isn't a multiple of 4). share|improve this answer answered May 8 '09 at 7:06 paxdiablo 488k1179691416 10 Memory mapped files can also generate SIGBUS. –bk1e May 8 '09 at 16:06 on arm SIGBUS can occur if you read a float from an address that is not 4 byte aligned –shoosh Mar 30 at 7:29 shoosh, I'm pretty certain that's covered by my second bullet point. –paxdiablo Mar 30 at 13:28 add a comment| up vote 11 down vote SIGBUS will also be raised if you mmap() a file and attempt to access part of the mapped buffer that extends past the end of the file, as well as for error conditions such as out of space. If you register a signal handler using sigaction() and you set SA_SIGINFO, it may be possible to have your program examine the faulting memory address and handle only memory mapped file errors. share|improve this answer answered May 8 '09 at 16:04 bk1e 17.9k43760 add a comment| up vote 5 down vote For instance, a bus error might be caused when your program tries to do something that the
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