From 983b7ed39702b1ed4f33886473fb810ba41501ce Mon Sep 17 00:00:00 2001
From: Zhangxinyi <643470801@qq.com>
Date: Fri, 24 May 2024 19:06:33 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E6=B5=8B=E8=AF=95=E4=BB=A3?=
 =?UTF-8?q?=E7=A0=81&=E6=9B=B4=E6=96=B0README?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../CPU_Subsystem/cpu_watcher/README.md       |  46 ++++---
 .../CPU_Subsystem/cpu_watcher/cpu_watcher.c   |   2 +-
 .../cpu_watcher/docs/image/image13.png        | Bin 0 -> 19485 bytes
 .../cpu_watcher/test/test_cpuwatcher.c        | 113 +++++++++++-------
 4 files changed, 106 insertions(+), 55 deletions(-)
 create mode 100644 eBPF_Supermarket/CPU_Subsystem/cpu_watcher/docs/image/image13.png

diff --git a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/README.md b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/README.md
index b981830cd..ce938ded0 100644
--- a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/README.md
+++ b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/README.md
@@ -29,14 +29,20 @@ make clean                       清除生成文件
 
 |        参数        |                    描述                    |
 | :----------------: | :----------------------------------------: |
-|      -s ：SAR      |     实时采集SAR的各项指标,每秒输出一次     |
+|      -s ：SAR      |           实时采集SAR的各项指标            |
+|    -i：interval    |           修改SAR功能的输出间隔            |
+|    -P：percent     |      按照百分比输出SAR功能的各项指标       |
 |  -p：preempt_time  |   实时采集当前系统的每次抢占调度详细信息   |
 | -d：schedule_delay |         实时采集当前系统的调度时延         |
 | -S：syscall_delay  |          实时采集当前系统调用时间          |
 |    -m：mq_delay    |        实时采集当前消息队列通信时延        |
 |    -c：cs_delay    | 实时对内核函数schedule()的执行时长进行测试 |
 
-### 1.SAR 统计功能(每秒输出一次)：
+### 1.SAR 统计功能：
+
+```shell
+./cpu_watcher -s
+```
 
 #### 输出效果：
 
@@ -56,6 +62,16 @@ make clean                       清除生成文件
 16:18:14       43     1032      1      577         19513      1704        3919        26       10       30
 ```
 
+​	使用参数i可以调整输出间隔，默认为1s，参数p可以按照cpu核数和自定义的输出间隔对数据进行归一化，并以百分比的形式输出，且大于60%的数据会标红输出：
+
+```shell
+./cpu_watcher -s -i 2 -P
+```
+#### 输出效果：
+
+![image13](image/image13.png)
+
+
 对上述参数的解释：
 
 - `proc/s`: 每秒创建的进程数，此数值是通过fork数来统计的。
@@ -71,6 +87,7 @@ make clean                       清除生成文件
 原理介绍:
 
 [libbpf_sar工具原理分析](docs/libbpf_sar.md)
+
 ### **2.统计抢占调度时间：**
 
 ​	统计系统中发生抢占调度的情况，包括抢占进程的`pid`与进程名，以及被强占进程的`pid`，和本次抢占时间，单位纳秒。
@@ -98,21 +115,22 @@ node             14221   2589     3355
 
 ### 3.**统计调度延迟：**
 
-​	分析系统中进程调度的延迟情况，提供相关统计数据，输出包括当前系统的最大调度延迟、最小调度延迟、平均调度延迟。
+​	分析系统中进程调度的延迟情况，提供相关统计数据，输出包括当前系统的最大调度延迟、最小调度延迟、平均调度延迟,以及对应进程的名字。
 
 #### 输出效果：
 
 ```
- TIME    avg_delay/μs     max_delay/μs     min_delay/μs
-17:31:28  35.005000       97.663000         9.399000        
-17:31:29  326.518000      12618.465000      7.994000        
-17:31:30  455.837000      217053.545000     6.462000        
-17:31:31  422.582000      217053.545000     6.462000        
-17:31:32  382.627000      217053.545000     6.462000        
-17:31:33  360.499000      217053.545000     6.462000        
-17:31:34  364.805000      217053.545000     6.462000        
-17:31:35  362.039000      217053.545000     6.462000        
-17:31:36  373.751000      217053.545000     6.462000
+ TIME   avg_delay/μs     max_delay/μs    max_proc_name    min_delay/μs   min_proc_name
+22:06:02  642.770000      60711.755000           node        5.227000      cpu_watcher
+22:06:03  510.041000      60711.755000           node        5.227000      cpu_watcher
+22:06:04  491.107000      60711.755000           node        5.227000      cpu_watcher
+22:06:05  468.128000      60711.755000           node        5.227000      cpu_watcher
+22:06:06  454.244000      60711.755000           node        5.227000      cpu_watcher
+22:06:07  472.455000      61931.163000           node        5.227000      cpu_watcher
+22:06:08  441.756000      61931.163000           node        3.360000      cpu_watcher
+22:06:09  442.631000      61931.163000           node        3.360000      cpu_watcher
+22:06:10  407.389000      61931.163000           node        2.549000      cpu_watcher
+22:06:11  426.593000      62247.982000           node        2.549000      cpu_watcher
 ```
 原理介绍：
 
@@ -234,4 +252,4 @@ per_len = 1000
 
 如果你也对cpu_watcher或ebpf感兴趣，欢迎加入我们一起开发cpu_watcher工具，希望我们可以共同成长。
 
-**cpu_watcher负责人：**  albert_xuu@163.com    zhangxy1016304@163.com    zhangziheng0525@163.com
+**cpu_watcher负责人：**  albert_xuu@163.com    zhangxy1016304@163.com    zhangziheng0525@163.com
\ No newline at end of file
diff --git a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/cpu_watcher.c b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/cpu_watcher.c
index 8e3f85370..fe3832719 100644
--- a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/cpu_watcher.c
+++ b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/cpu_watcher.c
@@ -555,7 +555,7 @@ static int mq_event(void *ctx, void *data,unsigned long data_sz)
 	}else{
 		delay = (e->rcv_exit_time - e->send_enter_time)/1000000.0 + send_delay + rcv_delay;		
 	}
-	printf("%02d:%02d:%02d   %-8llu %-8lu %-8lu \t%-16ld %-16ld %-16ld %-16ld\t%-15.5f %-15.5f %-15.5f\n",
+	printf("%02d:%02d:%02d   %-8u %-8u %-8u \t%-16llu %-16llu %-16llu %-16llu\t%-15.5f %-15.5f %-15.5f\n",
 		localTime->tm_hour, localTime->tm_min, localTime->tm_sec,
 		e->mqdes,e->send_pid,e->rcv_pid,
 		e->send_enter_time,e->send_exit_time,e->rcv_enter_time,e->rcv_exit_time,
diff --git a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/docs/image/image13.png b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/docs/image/image13.png
new file mode 100644
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HcmV?d00001

diff --git a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/test/test_cpuwatcher.c b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/test/test_cpuwatcher.c
index 87fcf2431..0d5561ebd 100644
--- a/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/test/test_cpuwatcher.c
+++ b/eBPF_Supermarket/CPU_Subsystem/cpu_watcher/test/test_cpuwatcher.c
@@ -1,21 +1,3 @@
-// Copyright 2024 The LMP Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// https://github.com/linuxkerneltravel/lmp/blob/develop/LICENSE
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// author: albert_xuu@163.com zhangxy1016304@163.com zhangziheng0525@163.com
-//
-// process image of the user test program
-
 #include <stdio.h>
 #include <unistd.h>
 #include <time.h>
@@ -49,19 +31,20 @@ static struct env {
 const char argp_program_doc[] ="To test cpu_watcher.\n";
 
 static const struct argp_option opts[] = {
-   { "sar", 's', NULL, 0, "To test sar" },
-   { "cs_delay", 'c', NULL, 0, "To test cs_delay" },
-   { "sc_delay", 'S', NULL, 0, "To test sc_delay" },
-   { "mq_delay", 'm', NULL, 0, "To test mq_delay" },
-   { "preempt_delay", 'p', NULL, 0, "To test preempt_delay" },
-   { "schedule_delay", 'd', NULL, 0, "To test schedule_delay"},
-   { "all", 'a', NULL, 0, "To test all" },
-   { NULL, 'h', NULL, OPTION_HIDDEN, "show the full help" },
+   { "sar", 's', NULL, 0, "To test sar", 0 },
+   { "cs_delay", 'c', NULL, 0, "To test cs_delay", 0 },
+   { "sc_delay", 'S', NULL, 0, "To test sc_delay", 0 },
+   { "mq_delay", 'm', NULL, 0, "To test mq_delay", 0 },
+   { "preempt_delay", 'p', NULL, 0, "To test preempt_delay", 0 },
+   { "schedule_delay", 'd', NULL, 0, "To test schedule_delay", 0 },
+   { "all", 'a', NULL, 0, "To test all", 0 },
+   { NULL, 'h', NULL, OPTION_HIDDEN, "show the full help", 0 },
    {},
 };
 
 static error_t parse_arg(int key, char *arg, struct argp_state *state)
 {
+    (void)arg; 
 	switch (key) {
 		case 'a':
 				env.sar_test = true;
@@ -99,20 +82,48 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
 	return 0;
 }
 
+void *schedule_stress_test(void *arg) {
+    (void)arg;
+    while (1) {
+        sched_yield(); // 调度函数
+    }
+    return NULL;
+}
+
+void start_schedule_stress_test(int num_threads) {
+    pthread_t *threads = malloc(num_threads * sizeof(pthread_t));
+    for (int i = 0; i < num_threads; i++) {
+        pthread_create(&threads[i], NULL, schedule_stress_test, NULL);
+    }
+    for (int i = 0; i < num_threads; i++) {
+        pthread_join(threads[i], NULL);
+    }
+    free(threads);
+}
+
 void *func(void *arg)
 {
+   (void)arg;
    int tpid;
-
    tpid = gettid();
    printf("新线程pid:%d,睡眠3s后退出\n",tpid);
    sleep(3);
    printf("新线程退出\n");
+   return NULL;
+}
+
+void input_pid() {
+    int stop;
+    int pid = getpid();
+    printf("test_proc进程的PID:【%d】\n", pid);
+    printf("输入任意数字继续程序的运行:");
+    scanf("%d", &stop); // 使用时将其取消注释
+    printf("程序开始执行...\n");
+    printf("\n");
 }
 
 int main(int argc, char **argv){
-    int pid,stop;
     int err;
-    pthread_t tid;
     static const struct argp argp = {
     	.options = opts,
     	.parser = parse_arg,
@@ -123,27 +134,40 @@ int main(int argc, char **argv){
     if (err)
     	return err;
 
-    pid = getpid();
-    printf("test_proc进程的PID:【%d】\n", pid);
-    printf("输入任意数字继续程序的运行:");
-    scanf("%d",&stop);                   // 使用时将其取消注释
-    printf("程序开始执行...\n");
-    printf("\n");
-
     if(env.sar_test){
-    /*sar的测试代码*/
+        printf("SAR_TEST----------------------------------------------\n");
+        //SAR功能测试逻辑：系统上执行混合压力测试，包括4个顺序读写硬盘线程、4个IO操作线程，持续15秒,观察加压前后的变化。
+        char *argvv[] = { "/usr/bin/stress-ng", "--hdd", "4", "--hdd-opts", "wr-seq,rd-seq", "--io", "4",  "--timeout", "15s", "--metrics-brief", NULL };
+        char *envp[] = { "PATH=/bin", NULL };
+        printf("SAR功能测试逻辑：系统上执行混合压力测试，包括4个顺序读写硬盘线程、4个IO操作线程和4个UDP网络操作线程，持续15秒,观察加压前后的变化\n");
+        printf("执行指令 stress-ng --hdd 4 --hdd-opts wr-seq,rd-seq --io 4 --udp 4 --timeout 15s --metrics-brief\n");
+        execve("/usr/bin/stress-ng", argvv, envp);
+        perror("execve");
+        printf("\n");
     }
 
     if(env.cs_delay_test){
-    /*cs_delay的测试代码*/
+         printf("CS_DELAY_TEST----------------------------------------------\n");
+         //CS_DELAY功能测试逻辑：无限循环的线程函数，不断调用 sched_yield() 来放弃 CPU 使用权，模拟高调度负载。
+         start_schedule_stress_test(10); // 创建10个线程进行调度压力测试
     }
 
     if(env.sc_delay_test){
-    /*sc_delay的测试代码*/
+         printf("SC_DELAY_TEST----------------------------------------------\n");
+         //SC_DELAY功能测试逻辑：创建多个系统调用，观察其变化
+          const int num_iterations = 1000000; // 系统调用的迭代次数
+        for (int i = 0; i < num_iterations; i++) {
+            getpid();     // 获取进程ID
+            getppid();    // 获取父进程ID
+            time(NULL);   // 获取当前时间
+            syscall(SYS_gettid); // 获取线程ID
+        }
+        printf("系统调用压力测试完成。\n");
     }
 
     if(env.mq_delay_test){
     /*mq_delay的测试代码*/
+        input_pid(); // 在mq_delay_test中调用
         system("./sender & ./receiver");
         sleep(60);
         system("^Z");
@@ -154,7 +178,16 @@ int main(int argc, char **argv){
     }
 
     if(env.schedule_test){
-    /*schedule_delay的测试代码*/
+        printf("SCHEDULE_TEST----------------------------------------------\n");
+        // 调度延迟测试逻辑：创建线程执行 sysbench --threads=32 --time=10 cpu run，观察加压前后的变化
+        char *argvv[] = { "/usr/bin/sysbench", "--threads=32", "--time=10", "cpu", "run", NULL };
+        char *envp[] = { "PATH=/bin", NULL };
+        printf("调度延迟测试逻辑：\n");
+        printf("执行指令 sysbench --threads=32 --time=10 cpu run\n");
+        execve("/usr/bin/sysbench", argvv, envp);
+        perror("execve");
+        
+        printf("\n");
     }
 
     return 0;