Programowo pobieraj zużycie pamięci na iPhonie

Próbuję odzyskać ilość pamięci, z której korzysta moja aplikacja na iPhone ' a w dowolnym momencie, programowo. Tak, Wiem o obiektach / przeciekach. Nie interesują mnie te, tylko po to, aby wiedzieć, czy można napisać jakiś kod i uzyskać ilość używanych bajtów i zgłosić to poprzez NSLog.

Dzięki.
Author: Coocoo4Cocoa, 2009-04-24
Source

7 answers

Aby uzyskać rzeczywiste bajty pamięci, których używa Twoja aplikacja, możesz zrobić coś takiego jak Poniższy przykład. Jednak naprawdę powinieneś zapoznać się z różnymi narzędziami do profilowania, ponieważ są one zaprojektowane tak, aby dać ci znacznie lepszy obraz użytkowania.

#import <mach/mach.h>

// ...

void report_memory(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);
  if( kerr == KERN_SUCCESS ) {
    NSLog(@"Memory in use (in bytes): %lu", info.resident_size);
    NSLog(@"Memory in use (in MB): %f", ((CGFloat)info.resident_size / 1000000));
  } else {
    NSLog(@"Error with task_info(): %s", mach_error_string(kerr));
  }
}

Istnieje również pole w informacji o strukturze.virtual_size, który da ci liczbę bajtów dostępnej pamięci wirtualnej (lub pamięci przydzielonej do aplikacji jako potencjalna pamięć wirtualna w dowolnym wydarzenie). Kod, z którym łączy się pgb, poda ilość pamięci dostępnej dla urządzenia i rodzaj pamięci.

 133
Author: Jason Coco,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2017-04-09 17:49:39

Nagłówki dla TASK_BASIC_INFO mówią: 

/* Don't use this, use MACH_TASK_BASIC_INFO instead */

Oto wersja MACH_TASK_BASIC_INFO: 

void report_memory(void)
{
    struct mach_task_basic_info info;
    mach_msg_type_number_t size = MACH_TASK_BASIC_INFO_COUNT;
    kern_return_t kerr = task_info(mach_task_self(),
                                   MACH_TASK_BASIC_INFO,
                                   (task_info_t)&info,
                                   &size);
    if( kerr == KERN_SUCCESS ) {
        NSLog(@"Memory in use (in bytes): %u", info.resident_size);
    } else {
        NSLog(@"Error with task_info(): %s", mach_error_string(kerr));
    }
}
 28
Author: combinatorial,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2014-12-05 19:21:40

Oto raport_memory() ulepszony, aby szybko pokazać status wycieku w nslog ().

void report_memory(void) {
    static unsigned last_resident_size=0;
    static unsigned greatest = 0;
    static unsigned last_greatest = 0;

    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);
    if( kerr == KERN_SUCCESS ) {
        int diff = (int)info.resident_size - (int)last_resident_size;
        unsigned latest = info.resident_size;
        if( latest > greatest   )   greatest = latest;  // track greatest mem usage
        int greatest_diff = greatest - last_greatest;
        int latest_greatest_diff = latest - greatest;
        NSLog(@"Mem: %10u (%10d) : %10d :   greatest: %10u (%d)", info.resident_size, diff,
          latest_greatest_diff,
          greatest, greatest_diff  );
    } else {
        NSLog(@"Error with task_info(): %s", mach_error_string(kerr));
    }
    last_resident_size = info.resident_size;
    last_greatest = greatest;
}
 19
Author: Doug Null,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2011-07-09 15:20:29

Szybkie rozwiązanie Jason Coco 's odpowiedź: 

func reportMemory() {
    let name = mach_task_self_
    let flavor = task_flavor_t(TASK_BASIC_INFO)
    let basicInfo = task_basic_info()
    var size: mach_msg_type_number_t = mach_msg_type_number_t(sizeofValue(basicInfo))
    let pointerOfBasicInfo = UnsafeMutablePointer<task_basic_info>.alloc(1)

    let kerr: kern_return_t = task_info(name, flavor, UnsafeMutablePointer(pointerOfBasicInfo), &size)
    let info = pointerOfBasicInfo.move()
    pointerOfBasicInfo.dealloc(1)

    if kerr == KERN_SUCCESS {
        print("Memory in use (in bytes): \(info.resident_size)")
    } else {
        print("error with task info(): \(mach_error_string(kerr))")
    }
}
 8
Author: Nazariy Vlizlo,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2017-05-23 12:02:42

Swift 3.1 (od sierpnia 8, 2017)

func getMemory() {

    var taskInfo = mach_task_basic_info()
    var count = mach_msg_type_number_t(MemoryLayout<mach_task_basic_info>.size)/4
    let kerr: kern_return_t = withUnsafeMutablePointer(to: &taskInfo) {
        $0.withMemoryRebound(to: integer_t.self, capacity: 1) {
            task_info(mach_task_self_, task_flavor_t(MACH_TASK_BASIC_INFO), $0, &count)
        }
    }
    if kerr == KERN_SUCCESS {
        let usedMegabytes = taskInfo.resident_size/1000000
        print("used megabytes: \(usedMegabytes)")
    } else {
        print("Error with task_info(): " +
            (String(cString: mach_error_string(kerr), encoding: String.Encoding.ascii) ?? "unknown error"))
    }

}
 4
Author: BennyTheNerd,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2017-08-09 18:48:58

Oto wersja Swift 3: 

func mach_task_self() -> task_t {
    return mach_task_self_
}

func getMegabytesUsed() -> Float? {
    var info = mach_task_basic_info()
    var count = mach_msg_type_number_t(MemoryLayout.size(ofValue: info) / MemoryLayout<integer_t>.size)
    let kerr = withUnsafeMutablePointer(to: &info) { infoPtr in
        return infoPtr.withMemoryRebound(to: integer_t.self, capacity: Int(count)) { (machPtr: UnsafeMutablePointer<integer_t>) in
            return task_info(
                mach_task_self(),
                task_flavor_t(MACH_TASK_BASIC_INFO),
                machPtr,
                &count
            )
        }
    }
    guard kerr == KERN_SUCCESS else {
        return nil
    }  
    return Float(info.resident_size) / (1024 * 1024)   
}
 3
Author: jeffbailey,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2016-10-21 13:15:21

Poniżej prawidłowa odpowiedź:

```

float GetTotalPhysicsMemory()
{
    struct task_basic_info info;
    mach_msg_type_number_t size = sizeof(info);
    kern_return_t kr;
    kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &size);
    if (kr == KERN_SUCCESS) 
        return (float)(info.resident_size) / 1024.0 / 1024.0;
    else
        return 0;
}

```

 0
Author: rensq,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2017-11-03 07:38:09