如何获取 iOS 中 GPU(视频)使用的 RAM 内存?
我可以获得以下内存统计信息:active_count、inactive_count、wire_count、free_count,但是不是视频使用的内存。
最佳答案
首先这是我用来获取内存使用情况的方法:
#import <mach/mach_host.h>
NSDictionary* getMemoryState (){
mach_port_t host_port;
mach_msg_type_number_t host_size;
vm_size_t pagesize;
host_port = mach_host_self();
host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
host_page_size(host_port, &pagesize);
vm_statistics_data_t vm_stat;
if (host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size) != KERN_SUCCESS) {
NSLog(@"Failed to fetch vm statistics");
}
/* Stats in bytes */
natural_t mem_used = (vm_stat.active_count +
vm_stat.inactive_count +
vm_stat.wire_count) * (unsigned int) pagesize;
natural_t mem_free = vm_stat.free_count * (unsigned int)pagesize;
natural_t mem_total = mem_used + mem_free;
//NSLog(@"used: %u free: %u total: %u active: %u video: %u", mem_used / 1024 /1024, mem_free / 1024 /1024, mem_total / 1024 /1024, vm_stat.active_count, 999 - (mem_total / 1024 /1024));
NSMutableDictionary *dictWithMemoryStats = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithInt:mem_total / 1024 / 1024] , @"total",
[NSNumber numberWithInt:mem_used / 1024 / 1024], @"used",
[NSNumber numberWithInt:mem_free / 1024 / 1024], @"free",
[NSNumber numberWithInt:((vm_stat.active_count * (unsigned int) pagesize) / 1024 / 1024)], @"active",
[NSNumber numberWithInt:(vm_stat.inactive_count * (unsigned int) pagesize) / 1024 /1014], @"inactive",
[NSNumber numberWithInt:(vm_stat.wire_count * (unsigned int) pagesize) / 1024/ 1024], @"wire",
nil];
return dictWithMemoryStats;
}
然后,要获得 GPU 占用的内存,您必须从设备的总 RAM 内存中减去通过上述方法获得的总内存。
let dictWithRamInfi: NSDictionary = getMemoryState()
let proInfo = NSProcessInfo.processInfo()
let totalRam: UInt64 = ((proInfo.physicalMemory / 1024) / 1024)
let totalActiveRam: UInt64 = UInt64(dictWithRamInfi["total"]!.unsignedLongLongValue)
let videoRam = totalRam - totalActiveRam
关于ios - 获取 iOS 中 GPU 使用的内存,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30775370/