公开(公告)号：CA2832571C

公开(公告)日：2021-01-12

申请号：CA2832571

申请日：2013-11-07

Applicant: IBM CANADA LTD IBM CANADA LIMITEE

Inventor： MICIC ALEKSANDAR ,  GRACIE CHARLES ROBERT

IPC: G06F12/00 ,  G06F11/30 ,  G06F12/02

Abstract: An illustrative embodiment of a computer-implemented method for estimating heap fragmentation in real time, models a runtime view of free heap memory, models a runtime view of heap allocation patterns for the heap memory and takes a snapshot of the heap memory. A batch allocator simulator is executed at a predetermined event and a remaining amount of memory unused in the simulation is identified as fragmented memory.

公开(公告)号：CA2848683C

公开(公告)日：2022-07-05

申请号：CA2848683

申请日：2014-04-10

Applicant: IBM CANADA LTD IBM CANADA LIMITEE

Inventor： DAWSON MICHAEL HILTON ,  GRACIE CHARLES ROBERT ,  JOHNSON GRAEME

IPC: G06F12/02 ,  G06F9/455

Abstract: An illustrative embodiment of a computer-implemented method for working set adjustment receives a request to use less heap memory than an original maximum forming a new maximum, and determines whether a garbage collection will move objects in response to the request. Responsive to a determination the garbage collection will move objects, add a first callback triggered by initiation of the garbage collection and invoking a handler for the first callback notifying a memory manager to free objects allocated by balloon. The first callback completes and the garbage collection starts. A handler for a second callback is invoked which notifies the memory manager to allocate balloon objects and frees backing memory to an operating system. Completion of the second call back allows the garbage collection to proceed as usual.

公开(公告)号：CA2832571A1

公开(公告)日：2015-05-07

申请号：CA2832571

申请日：2013-11-07

Applicant: IBM CANADA

Inventor： MICIC ALEKSANDAR ,  GRACIE CHARLES ROBERT

IPC: G06F12/00 ,  G06F11/30 ,  G06F12/02

Abstract: An illustrative embodiment of a computer-implemented method for estimating heap fragmentation in real time, models a runtime view of free heap memory, models a runtime view of heap allocation patterns for the heap memory and takes a snapshot of the heap memory. A batch allocator simulator is executed at a predetermined event and a remaining amount of memory unused in the simulation is identified as fragmented memory.

公开(公告)号：CA2848683A1

公开(公告)日：2015-10-10

申请号：CA2848683

申请日：2014-04-10

Applicant: IBM CANADA

Inventor： DAWSON MICHAEL HILTON ,  GRACIE CHARLES ROBERT ,  JOHNSON GRAEME

IPC: G06F12/02 ,  G06F9/455

Abstract: An illustrative embodiment of a computer-implemented method for working set adjustment receives a request to use less heap memory than an original maximum forming a new maximum, and determines whether a garbage collection will move objects in response to the request. Responsive to a determination the garbage collection will move objects, add a first callback triggered by initiation of the garbage collection and invoking a handler for the first callback notifying a memory manager to free objects allocated by balloon. The first callback completes and the garbage collection starts. A handler for a second callback is invoked which notifies the memory manager to allocate balloon objects and frees backing memory to an operating system. Completion of the second call back allows the garbage collection to proceed as usual.