heap-memory

I am using Ubuntu 14.04 64-bit. Here is my C++ code to see how memory is used. int main() { int **ptr; ptr = new int* [2]; cout << &ptr << " -> " << ptr << endl; for (int r = 1; r <= 2; r++) { ptr[r-1] = new int [2 * r]; cout << &ptr[r-1] << " -> " << ptr[r-1] << endl; for (int c = 0; c < 2 * r; c++) { ptr[r-1][c] = r * c; cout << &ptr[r-1][c] << " -> " << ptr[r-1][c] << endl; } } return 0; } Here is my output: 0x7fff09faf018 -> 0x1195010 0x1195010 -> 0x1195030 0x1195030 -> 0 0x1195034 -> 1 0x1195018 -> 0x1195050 0x1195050 -> 0 0x1195054 -> 2 0x1195058 -> 4 0x119505c -> 6 I expected the OS

This is crazy; has anyone ever seen this before? java –Xmx1G –Xms1G –XX:+UseG1GC -XX:+PerfDisableSharedMem -jar service-1.0-SNAPSHOT.jar Error: Could not find or load main class –Xmx1G I can do this: java -jar service-1.0-SNAPSHOT.jar –Xmx1G –Xms1G –XX:+UseG1GC -XX:+PerfDisableSharedMem but jmap -heap {PID} shows that it's ignoring the options completely. I've tried different variations: java –XX:+UseG1GC -jar service-1.0-SNAPSHOT.jar –Xmx1G –Xms1G -XX:+PerfDisableSharedMem java -Xms1G -Xmx1G -jar service-1.0-SNAPSHOT.jar java –xx:+useg1gc -jar service-1.0-SNAPSHOT.jar java -server –XX::

How are the sign bits determined when initializing an ndarray from empty memory? >>> np.random.randn(3,3) array([[-0.35557367, -0.0561576 , -1.84722985], [ 0.89342124, -0.50871646, 1.31368413], [ 0.0062188 , 1.62968789, 0.72367089]]) >>> np.empty((3,3)) array([[0.35557367, 0.0561576 , 1.84722985], [0.89342124, 0.50871646, 1.31368413], [0.0062188 , 1.62968789, 0.72367089]]) These float values initialized from empty memory have lost their signs † . Why is that? † Note: this result relies on implementation detail of memory re-use. The question asks what the implementation is doing. numpy.empty

How can I calculate heap chunk size from raw bytes read from memory. I tried below thing. 0:001> !heap Index Address Name Debugging options enabled 1: 00500000 2: 00280000 3: 008f0000 4: 00ab0000 5: 00cc0000 0:001> !heap -a 00500000 .. .. Heap entries for Segment00 in Heap 00500000 address: psize . size flags state (requested size) 00500000: 00000 . 00588 [101] - busy (587) 00500588: 00588 . 00240 [101] - busy (23f) 005007c8: 00240 . 00020 [101] - busy (18) 005007e8: 00020 . 00ca0 [101] - busy (c94) .. .. !heap -a 00500000 shows that size of first chunk is 588 bytes. If we dump the chunk

I know that before API 10 of Android, it was important to call recycle() for Bitmap s that aren't used anymore, since the actual raw data is stored in the native memory. However, as of API 11, Bitmap s are stored in the heap, so my question is: Is it still needed to call recycle() on Bitmap s if the API is large enough (at least 11)? What does it do if I call it on such API? s0nicYouth Official documentation tells that recycle() now is an advanced call so if you want to free your bitmap you can just write something like bitmap = null and GC will take care of everything else. 来源： https:/

I can imagine this question has been asked thousands of times, but I didn't have much luck in finding the answer, plus this is more out of curiosity than need. Digging into the nuts and bolts of C#, I was wondering since objects are stored in the heap, are the value types within the objects stored in the heap as well or are they placed in the stack? Reed Copsey They are stored in the heap, inside of the memory allocated for the reference type. In addition, value types are often stored in places other than "the stack" . However, the CLI spec does not specify where the memory pool that stores