performancecounter

问题 I'm trying to understand the cache misses recorded by perf. I have a minimal program: int main(void) { return 0; } If I compile this: gcc -std=c99 -W -Wall -Werror -O3 -S -o test.S test.c I get an expectedly small program: .file "test.c" .section .text.startup,"ax",@progbits .p2align 4,,15 .globl main .type main, @function main: .LFB0: .cfi_startproc xorl %eax, %eax ret .cfi_endproc .LFE0: .size main, .-main .ident "GCC: (Debian 4.7.2-5) 4.7.2" .section .note.GNU-stack,"",@progbits With only

问题 When I want to generate performance reports using perf-stat and perf-report from the Linux tool suite perf, I run: $ perf record -o my.perf.data myCmd $ perf report -i my.perf.data And: $ perf stat myCmd But that means I run 'myCmd' a second time, which takes several minutes. Instead, I was hoping for: $ perf stat -i my.perf.data But unlike most of the tools in the perf suite, I don't see a -i option for perf-stat. Is there another tool for this, or a way to get perf-report to generate

问题 When I want to generate performance reports using perf-stat and perf-report from the Linux tool suite perf, I run: $ perf record -o my.perf.data myCmd $ perf report -i my.perf.data And: $ perf stat myCmd But that means I run 'myCmd' a second time, which takes several minutes. Instead, I was hoping for: $ perf stat -i my.perf.data But unlike most of the tools in the perf suite, I don't see a -i option for perf-stat. Is there another tool for this, or a way to get perf-report to generate

问题 When I want to generate performance reports using perf-stat and perf-report from the Linux tool suite perf, I run: $ perf record -o my.perf.data myCmd $ perf report -i my.perf.data And: $ perf stat myCmd But that means I run 'myCmd' a second time, which takes several minutes. Instead, I was hoping for: $ perf stat -i my.perf.data But unlike most of the tools in the perf suite, I don't see a -i option for perf-stat. Is there another tool for this, or a way to get perf-report to generate

问题 What would be the best approach to count how many times an API is being triggered with its successful/failure response in spring boot. What I have in my mind is using a post construct to start a new thread when application comes up and when an api is being called and then using a counter service for each new unique request to count how many api's is being triggered by that particular request and how many of them are successful or failed. Recommend some new approaches if you guys have any. 回答1

问题 I am trying to write a PowerShell script that will continuously poll a performance counter every N seconds then sum the values returned by the counter. My end goal is to have results for a dozen or so counters get rolled up and shipped off to a Graphite server for monitoring and reporting. so far this is what I have cobbled together for a particular counter, i'm just not sure how to get a couple of things in the land of PowerShell magic voodoo. I can't figure out how to get the Job ID as an

问题 I have a python script that calls a USB-based data-acquisition C# dotnet executable. The main python script does many other things, e.g. it controls a stepper motor. We would like to check the relative timing of various operations, for that purpose the dotnet exe generates a log with timestamps from C# Stopwatch.GetTimestamp(), which as far as I know yields the same number as calls to win32 API QueryPerformanceCounter(). Now I would like to get similar numbers from the python script. time

问题 When I start up my game it stays around 95-101 rapidly changing, in between all of those numbers.. but when I open up the stats bar I'm getting upper 200's low 300's so wondering why that is still new to c# so be easy on me lol. heres the code thanks in advance as always ^_^. float deltaTime = 0.0f; void Update() { deltaTime += (Time.deltaTime - deltaTime) * 0.1f; } void OnGUI() { int w = Screen.width, h = Screen.height; GUIStyle style = new GUIStyle (); Rect rect = new Rect (0, 0, w, h * 2 /

问题 I am trying from a ASP.NET MVC Application (with VS 2012 on Windows 8 x64 PC) to add a Perfomance Counter but I have the problem that if I check the category exists or add a new Performance Counter Category the computer hangs My code is: namespace TestMvcCounter { public class MvcApplication : System.Web.HttpApplication { protected void Application_Start() { AreaRegistration.RegisterAllAreas(); WebApiConfig.Register(GlobalConfiguration.Configuration); FilterConfig.RegisterGlobalFilters

问题 I write some function in my OS kernel to issue the performance monitoring interrupt (PMI) on instructions counter overflow. It works well on my machine (Intel core i5). But when I run it on qemu using qemu-system-x86_64 -enable-kvm -cpu host -m 256 -serial mon:stdio -cdrom var/run/hypervisor.iso the interrupt does never fire. Is there anything I am missing? Does it require any special configuration to get the PMI fired on qemu? I recall that instruction counting works well in qemu. msr