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  • ios获取内存信息

    #import <sys/types.h>
    #import <sys/sysctl.h>
    #import <mach/host_info.h>
    #import <mach/mach_host.h>
    #import <mach/task_info.h>
    #import <mach/task.h>
    
    -(void) logMemoryInfo {
        
        
        int mib[6];
        mib[0] = CTL_HW;
        mib[1] = HW_PAGESIZE;
        
        int pagesize;
        size_t length;
        length = sizeof (pagesize);
        if (sysctl (mib, 2, &pagesize, &length, NULL, 0) < 0)
        {
            fprintf (stderr, "getting page size");
        }
        
        mach_msg_type_number_t count = HOST_VM_INFO_COUNT;
        
        vm_statistics_data_t vmstat;
        if (host_statistics (mach_host_self (), HOST_VM_INFO, (host_info_t) &vmstat, &count) != KERN_SUCCESS)
        {
            fprintf (stderr, "Failed to get VM statistics.");
        }
        task_basic_info_64_data_t info;
        unsigned size = sizeof (info);
        task_info (mach_task_self (), TASK_BASIC_INFO_64, (task_info_t) &info, &size);
        
        double unit = 1024 * 1024;
        double total = (vmstat.wire_count + vmstat.active_count + vmstat.inactive_count + vmstat.free_count) * pagesize / unit;
        double wired = vmstat.wire_count * pagesize / unit;
        double active = vmstat.active_count * pagesize / unit;
        double inactive = vmstat.inactive_count * pagesize / unit;
        double free = vmstat.free_count * pagesize / unit;
        double resident = info.resident_size / unit;
        NSLog(@"===================================================");
        NSLog(@"Total:%.2lfMb", total);
        NSLog(@"Wired:%.2lfMb", wired);
        NSLog(@"Active:%.2lfMb", active);
        NSLog(@"Inactive:%.2lfMb", inactive);
        NSLog(@"Free:%.2lfMb", free);
        NSLog(@"Resident:%.2lfMb", resident);
    }

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  • 原文地址:https://www.cnblogs.com/iapp/p/3631888.html
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