memory profiling tools

(/LIB64/LIBC.SO.6+0X36A101ECDC): 21:summary:addresssanitizer:double-free/home/ads/build23_6u0_x64/workspace/t-coresystem-clang/label/build23_ 6u0_x64/t-coresystem-clang/llvm-3.4/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:64 __interceptor_free ==11952==aborting: can see, addresssanitizer error, said core.c 34 line has a double-free mistake6 Example code 3The code above makes some minor changes, commenting out the code that releases E, to see if it detects

Introduction to common memory anomaly verification tools and methods under LinuxExceptions caused by memory anomalies are often difficult to verify, and this article describes the verification tools and methods for various common memory anomalies under Linux.1. Access null p

　　Log tools for monitoring CPU and memory Linux Tools: Download Address: Get_cpu_mem_info_sh.rar How to use: Download the file and upload it to the/tmp directory after decompression. Run CD switch to/tmp directory. Perform: Nohup Bash get_cpu_mem_info.sh The tool generates a log file in the/tmp directory that records the CPU and

Special tools and technologies--Optimize memory allocation[continued2]Seven.a memory allocator base class Pre-assigned piece The raw memory is used to hold the objects that are not constructed, and when the new elements are created, they can be constructed in a pre-allocated object, and when the elements are released,

The Memory tool captures SWF from the memory by looking for the first seven bytes of SwF (the three SWF files must mark the byte "FWS" or "CWS" or "zws" + four records the length of the SWF file ), therefore, to avoid being extracted, we only need to modify the first seven bytes after loading the SWF to the memory (modifying these seven bytes after the SWF is loa

View MemoryCommandThe free default is K for unitsYou can also specify M unitsOr G is the unit, this is not accurateTotal capacityHow many used are usedFree how much is left to see the second line. The first line is physical memory, plus the virtual memory buffers and cached equals the free second line of the actual remaining memoryBuffers data is going to be written to disk.Cached data is taken out of the d

Jmap The JDK comes with some tools to help us see the heap memory running by the JVM, often with the jmap command Jmap-heap Well, from this output we can also roughly see the structure of the heap, divided into young Generation (younger generation) and old Generation (older) Young generation is also classified as: Eden space, from space and to space You can see that the to area is clean and not ye

First, network monitoring tools 1. Linux various ways to view network card traffic: http://jasonyong.blog.51cto.com/47753/174197 2. NetPerf: Network Throughput/Latency: Http://www.ibm.com/developerworks/cn/linux/l-netperf/index.html?ca=drs 3. netstat:http://www.cnblogs.com/ggjucheng/archive/2012/01/08/2316661.html Second, disk monitoring tools 1. Linux disk read and write performance monitoring: http://blog

If the command is passed, it is generally called JPS to view the specific PID, then call Jstat to see the runtime memory, and the frequency of the GC, and then through Jstack to see if the thread is blocking, deadlock, looping, and so on, finally through Jmap generated heap snapshot to analyze memory overflow.With Visual Tools:In the case of jconsole, you can view the heap and the

The development of the collection of vehicle data program ran for 3-5 hours, the following results will appear The Discovery program runs the memory in these several red dots fluctuation, in the cpu100% appears for a period of time the program will automatically end. Later, the use of tool commands to analyze the problem is due to insufficient memory leading to the GC because GC Task thread occupies a