Created
November 20, 2013 08:59
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| //for loggin memory usage: | |
| #import "mach/mach.h" | |
| vm_size_t usedMemory(void) { | |
| struct task_basic_info info; | |
| mach_msg_type_number_t size = sizeof(info); | |
| kern_return_t kerr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &size); | |
| return (kerr == KERN_SUCCESS) ? info.resident_size : 0; // size in bytes | |
| } | |
| vm_size_t freeMemory(void) { | |
| mach_port_t host_port = mach_host_self(); | |
| mach_msg_type_number_t host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t); | |
| vm_size_t pagesize; | |
| vm_statistics_data_t vm_stat; | |
| host_page_size(host_port, &pagesize); | |
| (void) host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size); | |
| return vm_stat.free_count * pagesize; | |
| } | |
| -(void)logMemUsage { | |
| // compute memory usage and log if different by >= 100k | |
| static long prevMemUsage = 0; | |
| long curMemUsage = usedMemory(); | |
| long memUsageDiff = curMemUsage - prevMemUsage; | |
| if (memUsageDiff > 100000 || memUsageDiff < -100000) { | |
| prevMemUsage = curMemUsage; | |
| NSLog(@"Memory used %7.1f (%+5.0f), free %7.1f kb", curMemUsage/1000.0f, memUsageDiff/1000.0f, freeMemory()/1000.0f); | |
| [memoryLabel setText:[NSString stringWithFormat:@"Memory used %7.1f (%+5.0f), free %7.1f kb", curMemUsage/1000.0f, memUsageDiff/1000.0f, freeMemory()/1000.0f]]; | |
| } | |
| } |
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