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POTotal RAM in iPhone
 

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    <p>I want to know the <strong>Total</strong> RAM available in my iPhone. For this I've used the following code.</p> <p><strong>Note: Please do not interpret the question as to retrieve RAM statistics such as Wired, Inactive, Active and Free.</strong></p> <pre><code>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, &amp;pagesize); vm_statistics_data_t vm_stat; if (host_statistics(host_port, HOST_VM_INFO, (host_info_t)&amp;vm_stat, &amp;host_size) != KERN_SUCCESS) { NSLog(@"Failed to fetch vm statistics"); return; } /* Stats in bytes */ self.wired = vm_stat.wire_count * pagesize / (1024 * 1024); self.active = vm_stat.active_count * pagesize / (1024 * 1024); self.inactive = vm_stat.inactive_count * pagesize / (1024 * 1024); self.free = vm_stat.free_count * pagesize / (1024 * 1024); self.used = self.active + self.inactive + self.wired; self.total = self.used + self.free; </code></pre> <p>Here are the results:</p> <ul> <li><strong>Simulator</strong>: total memory = 2045 (my PC contains 2GB RAM). Seems correct.</li> <li><strong>Device (iPhone 4)</strong>: total memory = 390 (<a href="https://stackoverflow.com/a/371117/864850">should be 512</a>). Incorrect.</li> <li><strong>Device (iPhone 3GS)</strong>: total memory = 84 (<a href="https://stackoverflow.com/a/371117/864850">should be 256</a>). Incorrect.</li> </ul> <p>Please let me know if this is the correct way to calculate the <strong>TOTAL</strong> RAM of an iDevice?</p>
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    1. COPossible duplicate of http://stackoverflow.com/questions/8032635/responding-to-ram-availability-in-ios/8072278#8072278
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      1. USSam Dufel
 

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