mem

.gitignore

@@ -202,3 +202,4 @@ fabric.properties
 .idea/caches/build_file_checksums.ser
 
 vperf
+test/

CMakeLists.txt

@@ -10,6 +10,7 @@ add_definitions('-Wall')
 
 
 add_executable(${PROJECT_NAME} main.c test.c)
+SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/build/)
 
 #add_custom_target(${PROJECT_NAME}-symlink ALL ln --force -s ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME} ${CMAKE_SOURCE_DIR}/${PROJECT_NAME} DEPENDS ${PROJECT_NAME})
 set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES ${CMAKE_SOURCE_DIR}/${PROJECT_NAME})

build/meminfo

@@ -0,0 +1,47 @@
+MemTotal:        4169396 kB
+MemFree:         3468580 kB
+MemAvailable:    3660912 kB
+Buffers:            3268 kB
+Cached:           378088 kB
+SwapCached:            0 kB
+Active:           261560 kB
+Inactive:         257688 kB
+Active(anon):     133856 kB
+Inactive(anon):     8456 kB
+Active(file):     127704 kB
+Inactive(file):   249232 kB
+Unevictable:           0 kB
+Mlocked:               0 kB
+SwapTotal:       2097148 kB
+SwapFree:        2097148 kB
+Dirty:                 4 kB
+Writeback:             0 kB
+AnonPages:        136036 kB
+Mapped:           143540 kB
+Shmem:              8676 kB
+KReclaimable:      39372 kB
+Slab:             106852 kB
+SReclaimable:      39372 kB
+SUnreclaim:        67480 kB
+KernelStack:        2832 kB
+PageTables:         6408 kB
+NFS_Unstable:          0 kB
+Bounce:                0 kB
+WritebackTmp:          0 kB
+CommitLimit:     4181844 kB
+Committed_AS:     784436 kB
+VmallocTotal:   34359738367 kB
+VmallocUsed:           0 kB
+VmallocChunk:          0 kB
+HardwareCorrupted:     0 kB
+AnonHugePages:     30720 kB
+ShmemHugePages:        0 kB
+ShmemPmdMapped:        0 kB
+HugePages_Total:       0
+HugePages_Free:        0
+HugePages_Rsvd:        0
+HugePages_Surp:        0
+Hugepagesize:       2048 kB
+Hugetlb:               0 kB
+DirectMap4k:      138176 kB
+DirectMap2M:     4360192 kB

include/test.h

@@ -13,5 +13,6 @@
 
 double get_sqrt(double var1);
 
+void updateMem(unsigned int *all, unsigned int *fre, float *useage);
 
 #endif /* !TEST_H */

main.c

@@ -7,13 +7,30 @@
 
 #include<stdio.h>
 #include"./include/test.h"
+#include <stdlib.h>
+#include <string.h>
+#define MAX_LINE 1024
+struct memGlobal {
+    unsigned int All;
+    float Useage;
+    unsigned int Free;
+} memG;
+
+struct cpuGlobal {
+    float Useage;
+} cpuG;
+
+struct process {
+    char Name[128];
+    unsigned id;
+    float cpu;
+    float mem;
+} pList[1024];
 
 int main()
 {
-    double b=25.0;
-    double a=0.0;
-    a=get_sqrt(b);
-    printf("a is %lf, b is %lf\n",a,b);
+    updateMem(&memG.All, &memG.Free, &memG.Useage);
+    printf("mem: all %u  free: %u usage: %f\n", memG.All, memG.Free, memG.Useage);
     return 0;
 }
 

test.c

@@ -6,9 +6,25 @@
  */
 
 #include "./include/test.h"
-
+#include<stdio.h>
+#define MAX_LINE 1024
 
 double get_sqrt(double var1)
 {
     return sqrt(var1);
 }
+
+void updateMem(unsigned int *all, unsigned int *fre, float *useage) {
+    char buf[MAX_LINE];  /*缓冲区*/
+    FILE *fp;            /*文件指针*/
+    if((fp = fopen("./meminfo","r")) == NULL)
+    {
+        perror("fail to read");
+        return;
+    }
+    fgets(buf,MAX_LINE,fp);
+    sscanf(buf, "%*s %u kB",all);
+    fgets(buf,MAX_LINE,fp);
+    sscanf(buf, "%*s %u kB",fre);
+    *useage = 1 - (float) *fre / *all;
+}