Perf vs gprof. The performance monitoring hardware is very machine specific, so you need to be careful when comparing data across machines. A program's performance is of key importance, and by using a profiling tool to determine which parts are adequate and which parts are less efficient, there is room to improve its efficiency. There are a few libraries that make use of these performance counters, including the Linux perf system and likwid Well, for one thing, valgrind's various tools are great for catching errors like unfreed pointers, use-after-free, off-by-one etc. The kernel perf significantly subsets the pmu events and maps those to generic event names such as cycles and llc-misses (last level cache misses). Examples include how long it takes to execute a program or where in the execution it gets stuck. Historically, it supported some software TIMER interrupts, but now, since opcontrol legacy mode has been replaced by operf/ocount tools, the oprofile's source of Profiling some C++ number crunching code with both gprof and kcachegrind gives similar results for the functions that contribute most to the execution time (50-80% depending on input) but for funct. By utilizing tools like Valgrind, gprof, and Perf, you can gain valuable insights into your code's behavior and optimize it for better performance. Unfortunately, both of those tools have serious problems. On the whole, I've been favorably impressed. The standard tool is gprof and almost any compiler supports to instrument the code for gprof. It offers multiple profiling options and functions. Before I started using perf, trying to profile generally meant using oprofile or gprof. though, as far as I know at least. Dec 12, 2019 · Run the gprof [nameOfExecutableBeingProfiled]. , and if your program hits a segfault then valgrind will at least give you a call stack, so in that sense it's definitely a helpful tool to hunt for bugs. Statistical sampling based profiling on the other hand is probing the program call stack at regular intervals. gprof requires recompiling your entire application, which is not an intolerable burden for the Dec 18, 2008 · Survey of C++ profiling techniques: gprof vs valgrind vs perf vs gperftools In this answer, I will use several different tools to a analyze a few very simple test programs, in order to concretely compare how those tools work. perf is Linux-only, but have access to hardware performance monitoring unit and support both single-program profiling and system-wide profiling. Each tool offers unique features and capabilities, catering to different needs and environments. Reply reply More Jun 6, 2012 · For the past few months, I've spent a good deal of time using the Linux utility perf to profile PostgreSQL. A widespread tool for sampling based profiling is the perf tool which builds on the builtin profiling infrastructure in recent Linux kernels. Each tool has its unique features, so choose the one that best fits your needs and start profiling today. Dec 13, 2022 · Software profiling is used to analyze a program's behavior. Jul 4, 2025 · In this article, we delve into three prominent CPU profiling tools: Intel VTune, perf, and gprof. It's not a "proper" debugger that supports breakpoints etc. Software profilers are tools that assist in Mar 21, 2017 · So, gprof can show you exact function call count of single program, but it can't resolve call stack (it only approximate it). Sep 29, 2016 · 三种Linux性能分析工具的比较，总结了实际项目中对三种性能分析工具的使用经验，用gprof、perf、stap对同一个示例程序进行了分析，比较了各自的优劣，提出了总体的性能分析建议。 Sep 17, 2020 · Performance counters and virtual despair If you have access to a physical machine with no virtualization, and you are able to get root access, you can use performance counters to tell things like how many cache misses you suffered, how many misalignment penalties, and so forth. perf Perf is a more powerful profiling tool providing you with more control over the profiling data. Hi, I don't know much about gprof, so maybe someone should add some more information The aim of OProfile is counting, profiling (sampling), code annotation and callgraph generation, all that based on PMU events generated by CPU. And there are gprofs in Linux, BSD, and many other Unixes and Unix-like OS. hrhhgjr htjle hvdlz rzol pxwtv vxn fqo pkv pshzovg qbqlsf