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• Light Weight repalcement to GNOME for Ubuntu

  - by Talguy

  I am working on rolling a bit of my own version of linux for my real time car application. I plan to base it off of minimal ubuntu (only needsd 32 MB of memory). I am not the most skilled person with linux so not really sure how to assess components when adding them to my system. What I am looking for is a lightweight windows manager to replace gnome and it has to support the gtkmm library. Does anyone know of one?

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• Alias for a C++ template?

  - by porgarmingduod

  typedef boost::interprocess::managed_shared_memory::segment_manager segment_manager_t; // Works fine, segment_manager is a class typedef boost::interprocess::adaptive_pool allocator_t; // Can't do this, adaptive_pool is a template The idea is that if I want to switch between boost interprocess' several different options for shared memory and allocators, I just modify the typedefs. Unfortunately the allocators are templates, so I can't typedef the allocator I want to use. Is there a way to achieve an alias to a template in C++? (Except for the obvious #define ALLOCATOR_T boost::interprocess::adaptive_pool)

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• How to find crc32 of big files ?

  - by Arsheep

  The PHP's crc32 support string as input.And For a file , below code will work OFC. crc32(file_get_contents("myfile.CSV")); But if file goes huge (2 GB) it might raise out of memory Fatal error. So any way around to find checksum of huge files ?

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• Does the majority A-grade browsers cache content over https to disk?

  - by nimo9367

  I have read somewhere that javascript and css files that only get cached in memory sooner or later get pushed out by other content. Is this true? Are there any other issues regarding cashing SSL-objects?

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• Is Java really fit for mobile phone programes?

  - by httpinterpret

  Java needs JVM to function, but JVM requires about 200MB of memory. So I doubt there is any mobile phone fit for Java, is there?

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• How to specify the equivalent of ppn in SGE queing system ?

  - by debugger

  Hello All, Is there a way to specify the ppn ( or equivalent ) in SGE ? i don't want to use all cpus in one node so i will be able to have more memory per core. ( In PBS you would do -l nodes=16:ppn=2 for exemple) Thanks.

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• ASP.NET 'Session.Remove(key)' v/s 'Session(key) = nothing'

  - by Whiskey-Tango-Foxtrot

  I've seen developers use two approaches when they are done with a session object. 1) Session.Remove(key) 2) Session(key) = nothing What is the better approach of the two above? Does Session.Remove dispose the object stored automatically? Does the second approach depend on the garbage collector to actually free up the memory? Thanks.

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• Get current time crossplatform in c++

  - by Ockonal

  Hello, How can I get current time (I need hours, minutes, seconds) crossplatform in c++? I saw here make structure of values but there are a lots of another stuff that I don't need. And memory is very important here.

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• Hardest concept to grasp as a beginner

  - by noizetoys

  When you were starting to program, what was the hardest concept for you to grasp? Was it recursion, pointers, linked lists, assignments, memory management? I was wondering what gave you headaches and how you overcame this issue and learned to love the bomb, I mean understand it. EDIT: As a followup, what helped you grok your hard-to-grasp concept?

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• new Integer vs valueOf

  - by LB

  Hi, I was using Sonar to make my code cleaner, and it pointed that I'm using new Integer(1) instead of Integer.valueOf(1). Because it seems that valueOf does not instantiate a new object so is more memory-friendly. How can valueOf not instantiate a new object ? How does it work ? Is this true for all integers ? thanks.

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• I need to use profiler in my IDE.

  - by ashwani66476

  Hello I am using RSA7 as IDE, I need to use profiler in my IDE for memory analysis. Can any one suggest me From where I can free download it? How can I use it with RSA7? Many Thanks

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• What does "performant" software actually mean?

  - by Roddy

  I see it used a lot, but haven't seen a definition that makes complete sense. Wiktionary says "characterized by an adequate or excellent level of performance or efficiency", which isn't much help. Initially I though performant just meant "fast", but others seem to think it's also about stability, code quality, memory use/footprint, or some combination of all those. I think this is a "real" question - but if enough people reckon this is a subjective question, that's an answer in itself.

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• dot length in java - finding its definition

  - by abson

  In which class the length variable is defined in java(one used for printing array length)? Will I be able to see it defined say in Object class? EDIT : Why was this field so designed(any thing related with security or memory efficiency)?

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• What to Learn after C++?

  - by Stephen Whitmore

  I have been learning C++ for a while now, I find it very powerful. But, the problem is the the level of abstraction is not much and I have to do memory management myself. What are the languages that I can use which uses a higher level of abstraction.

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• Queue implementation with blocked 'take()' but with eviction policy

  - by mjlee

  Is there an implementation with a blocking queue for take but bounded by a maximum size. However, when the maximum size is reached, instead of blocking, it will remove from the head. One usage is that if I have a very slow consumer, the system will not crash ( runs out of memory ) rather these message will be removed.

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• Can I assign array size using NSMutableArray?

  - by Tattat

  I used to be a Java Programmer, which the array need to declare the very first time, like this: int[] anArray; // declares an array of integers anArray = new int[10]; // allocates memory for 10 integers I don't know whether the Objective C , NSMutableArray also give me this ability or not. Actually, I want to make a 10*10 array. thz in advance.

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• Possible reasons and resolutions for time out

  - by ming yeow

  I cannot SSH into my instance - Operation timed out. What could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst UPDATE: It is not about permissions - i can log in normally just fine. I suspect it might be because of memory issues

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• Unable to debug St9bad_alloc error. Tried reducing the size of the data structure, error still persists

  - by timtowtdi

  I get a St9bad_alloc error which I'm unable to debug. I tried reducing the size of the data structure to eliminate the possibility that I might be running out of memory but that doesn't seem to be the case. These are the relevant files:- gdb backtrace: http://pastebin.com/5hFhHXnL TraceCache.cc: http://pastebin.com/j8vK812j I can't understand how, in the backtrace it jumps from TraceCache.cc:55 to TraceCache.cc:34 whereas in my code I can't see any such path. Please let me know in case any other information is required. Thanks

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• What the best multi-thread application debugger for C++ apps.

  - by Coredumped

  I'm looking for a good multi-thread-aware debugger, capable of showing performance charts of application threads on Linux, don't know if such a thing exists, perhaps as a Eclipse plugin. The idea would be to track per thread memory allocation a CPU usage as well as being able to interrupt a thread and examine its stack trace, local vars, etc. It does not have to be an eclipse plugin or a free tool, do any of you have heard of something similar?

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• problems with 'free' in C

  - by lego69

  hello, can somebody please explain can I free const char* ? I allocated new memory using malloc and when I'm trying to free it I always receive an error incompatible pointer type thanks in advance something like this char* name="Arnold"; const char* str=malloc(stlen(name)+1); free(str); <- here bug

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• How early can I call kalloc in an arm linux kernel?

  - by Isaac Sutherland

  I would like to dynamically allocate memory from the machine_init function in my arm linux kernel. Calling kalloc can result in a complete failure of the system to boot. My debugging tools are very limited so I can't give much more information regarding the failure. Simply put, is it legal to call kalloc from a machine_init function in arm linux, and, if not, is there an alternative?

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• GC generation 3 appearing in windbg

  - by Johnv2020

  I've a dump file of a process I'm running (trying to find a memory leak) One thing I've noticed is that when I dump the bigger objects via !do windbg tells me that they are GC generation 3 ?? All of these are byte arrays so when I look at all the byte arrays in the dump I can see GC generations 0, 1, 2 & 3. Could someone explain whats going on here as I thought there was only 3 generations of GC.

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• Delphi: Which are the downsides of having unused units listed in the uses clause?

  - by user193655

  I use cnPack Uses cleaner, but in general which are the downsides of having useless units? I know some of them: 1) of course if the unit is never used across the full project there will be useless resource consuption 2) the code insight will give useless results 3) the code insight will be slower But imagine a simple case: I have a project with 2 forms, I use StrUtils in one of them but I declared StrUtils in both of them... Is there any downside in temrs of memory consumption in this case or not?

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• "blkclr (mach_kernel)" shows up in mac's shark profiler. What does it do?

  - by lh3

  I am profiling a C program using Mac's Shark which shows that some of CPU time goes to "blkclr" in "mach_kernel". What does this kernel function do? I speculate it is related to memory allocation, but I am not sure. I have googled for some time, but could not find the answer, either. Does someone know this? Thanks in advance.

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• What value is hashCode() method is returning in java?

  - by Jothi

  What value is hashCode() method is returning in java?. i read that it is an memory reference of an object. when i print hascode value for new Integer(1), its 1. for String(a) - 97. so i confused. is it ascii or what type of value is?

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