fragment the heap
play

Fragment the Heap! ...let the compiler / VM implementors deal with - PowerPoint PPT Presentation

Dec 03, 2022 •368 likes •466 views

Fragment the Heap! ...let the compiler / VM implementors deal with fragmentation! Dr. Fridtjof Siebert CTO, aicas ISMM 2008, Tucson, 8. June 2008 Fragment the Heap! Split Heap in small fixed-size blocks Allocate only these blocks smaller

  1. Fragment the Heap! ...let the compiler / VM implementors deal with fragmentation! Dr. Fridtjof Siebert CTO, aicas ISMM 2008, Tucson, 8. June 2008

  2. Fragment the Heap! Split Heap in small fixed-size blocks Allocate only these blocks ● smaller objects use one block ● larger objects use graph of blocks Let the VM/compiler emit code to access these objects! 2

  3. Fragment the Heap! Objects and Arrays Block 1 (Header) Block 2 Block 3 head field 5 field 12 type field 6 field 13 monitor field 7 field 14 field 1 field 8 field 15 ― field 2 field 9 ― field 3 field 10 ― field 4 field 11 ― next next 3

  4. Fragment the Heap! Objects and Arrays head type length depth element 0 element 1 element 2 element 3 4

  5. Fragment the Heap! Objects and Arrays element 0 element 1 element 2 element 3 element 4 element 5 element 6 element 7 element 8 element 9 head element 10 type element 11 length element 12 depth element 13 link 0 element 14 link 1 element 15 link 2 link 3 element 16 element 17 element 18 element 19 element 20 element 21 element 22 element 23 element 24 element 25 element 26 element 27 element 28 element 29 element 30 5 element 31

  6. element 97 element 98 element 99 element 100 element 101 element 102 element 103 element 104 element 105 Fragment the Heap! element 106 element 107 element 108 Objects and Arrays element 109 element 110 element 111 link 0 element 112 link 1 element 113 link 2 element 114 link 3 element 115 link 4 element 116 link 5 element 117 link 6 element 118 link 7 element 119 element 120 link 8 element 121 link 9 head element 122 link 10 type element 123 link 11 length element 124 link 12 depth element 125 link 13 link 0 element 126 link 14 link 1 element 127 link 15 link 2 link 3 element 128 link 16 element 129 link 17 element 130 link 18 element 131 link 19 element 132 link 20 element 133 link 21 element 134 link 22 element 135 link 23 element 136 link 24 element 137 link 25 element 138 link 26 element 139 link 27 element 140 link 28 element 141 link 29 element 142 link 30 6 element 143 link 31 element 144 element 145

  7. Fragment the Heap! Pro's GC ● no compaction phase ● unique GC mark & sweep steps ● no tricks (pinning, arraylets, etc.) ● no coalescing ● only one free list VM compiler ● no handles, forwarding ptrs, ... ● no pointer updates ● alloc never fails due to fragmentation 7

  8. Fragment the Heap! Pro's Parallel systems ● very simple free list ● no locks, free list modifications via CAS ● simple stealing, blancing, etc. between processors ● David Bacon: Look at pathological case! 8

  9. Fragment the Heap! Any relevant Con's? 9

Download Presentation
Download Policy: The content available on the website is offered to you 'AS IS' for your personal information and use only. It cannot be commercialized, licensed, or distributed on other websites without prior consent from the author. To download a presentation, simply click this link. If you encounter any difficulties during the download process, it's possible that the publisher has removed the file from their server.

Recommend

PROGRAM HEAP 2020-2021 WHAT IS HEAP? HEAP is a federally funded program that assists low

PROGRAM HEAP 2020-2021 WHAT IS HEAP? HEAP is a federally funded program that assists low

ERIE COUNTY DEPARTMENT OF SOCIAL SERVICES Program Overview PROGRAM HEAP 2020-2021 WHAT IS HEAP? HEAP is a federally funded program that assists low income households to reduce energy expense s. HEAP PROGRAMS Regular HEAP Available

531 views • 14 slides
Heapsort Build-Max-Heap Next we build a full heap from an unsorted sequence Build-Max-Heap(A)

Heapsort Build-Max-Heap Next we build a full heap from an unsorted sequence Build-Max-Heap(A)

Heapsort Build-Max-Heap Next we build a full heap from an unsorted sequence Build-Max-Heap(A) for i = floor( A.length/2 ) to 1 Max-Heapify(A, i) Build-Max-Heap Red part is already Heapified Build-Max-Heap Correctness: Base: Each alone

429 views • 23 slides
Windows 8 Heap Internals Windows 8 Heap Internals Windows 8 Heap Internals INTRODUCTION Windows 8

Windows 8 Heap Internals Windows 8 Heap Internals Windows 8 Heap Internals INTRODUCTION Windows 8

Windows 8 Heap Internals Windows 8 Heap Internals Windows 8 Heap Internals INTRODUCTION Windows 8 Heap Internals Who Chris Valasek (@nudehaberdasher) Sr. Research Scientist Coverity Tarjei Mandt (@kernelpool) Vulnerability

1.33k views • 91 slides
Chapter 19: Binomial Heaps We will study another heap structure called, the binomial heap. The

Chapter 19: Binomial Heaps We will study another heap structure called, the binomial heap. The

Chapter 19: Binomial Heaps We will study another heap structure called, the binomial heap. The binomial heap allows for efficient union, which can not be done efficiently in the binary heap. The extra cost paid is the minimum operation, which

560 views • 24 slides
11. Arrays 11- 1 (2) Array Property Fragment of T A Decidable fragment of T A that includes

11. Arrays 11- 1 (2) Array Property Fragment of T A Decidable fragment of T A that includes

11. Arrays 11- 1 (2) Array Property Fragment of T A Decidable fragment of T A that includes quantifiers Array property A -formula of form i . F [ i ] G [ i ] , where i is a list of variables. index guard F [ i ]: iguard

1.19k views • 21 slides
When Testing in Production is a Good Idea Dan Robinson CTO, Heap whoami Joined as Heap's

When Testing in Production is a Good Idea Dan Robinson CTO, Heap whoami Joined as Heap's

When Testing in Production is a Good Idea Dan Robinson CTO, Heap whoami Joined as Heap's first hire in July, 2013. Previously an engineer at Palantir. Studied Math & CS at Stanford. What we'll talk about: 1. What is Heap? 2.

695 views • 47 slides
heaps and heapsort on n elements height of a heap is in (log n ) building a heap bottum-up in O (

heaps and heapsort on n elements height of a heap is in (log n ) building a heap bottum-up in O (

heaps and heapsort on n elements height of a heap is in (log n ) building a heap bottum-up in O ( n ) analysis via picture (learn) or using summations (know result) data structures and algorithms building a heap one-by-one in O ( n log n ) 2020

672 views • 7 slides
The Fragment Shader CS418 Computer Graphics John C. Hart Fragment Pipeline Rasterization Model

The Fragment Shader CS418 Computer Graphics John C. Hart Fragment Pipeline Rasterization Model

The Fragment Shader CS418 Computer Graphics John C. Hart Fragment Pipeline Rasterization Model Vertex Clip Clip & Window Viewport Coords W2V Interpolation Coords Shader Coords Divide Coords Depth Fragment Pixels Fragments

92 views • 8 slides
Similar code fragment A code fragment that has similar part to it in source code

Similar code fragment A code fragment that has similar part to it in source code

Similar code fragment A code fragment that has similar part to it in source code introduced in source code because of various reasons. e.g. copy-and-paste makes software maintenance difficult. It is necessary to It is

488 views • 9 slides
Initializing A Max Heap Initializing A Max Heap 1 1 3 3 2 2 4 5 6 7 4 5 6 7 8 9 7

Initializing A Max Heap Initializing A Max Heap 1 1 3 3 2 2 4 5 6 7 4 5 6 7 8 9 7

Initializing A Max Heap Initializing A Max Heap 1 1 3 3 2 2 4 5 6 7 4 5 6 7 8 9 7 7 11 8 8 9 7 7 11 8 10 10 input array = [-, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11] Start at rightmost array position that has a child.

522 views • 9 slides
Synthesis and properties of 1,3-dioxo-1 H - inden-2(3 H )-ylidene fragment and (3-

Synthesis and properties of 1,3-dioxo-1 H - inden-2(3 H )-ylidene fragment and (3-

Synthesis and properties of 1,3-dioxo-1 H - inden-2(3 H )-ylidene fragment and (3- (dicyanomethylene)-5,5-dimethylcyclohex-1- enyl)vinyl fragment containing derivatives of azobenzene for holographic recording materials Elm rs Zari ,

244 views • 13 slides
Understanding the heap by breaking it A case study of the heap as a persistent data structure

Understanding the heap by breaking it A case study of the heap as a persistent data structure

Understanding the heap by breaking it A case study of the heap as a persistent data structure through non-traditional exploitation techniques Justin N. Ferguson // BH2007 The heap, what is it? Globally scoped data structure

906 views • 58 slides
In the Beginning was the Word Stephen Heap In the Beginning was the Word

In the Beginning was the Word Stephen Heap In the Beginning was the Word

In the Beginning was the Word Stephen Heap In the Beginning was the Word s.heap@uq.edu.au Stephen Heap s.heap@uq.edu.au Reading skill is based on three kinds of knowledge A fluent reader must have knowledge of: Language : word

480 views • 46 slides
A heap, a stack, a bottle and a rack The Stack Canary Birds The heap Answer: The first three

A heap, a stack, a bottle and a rack The Stack Canary Birds The heap Answer: The first three

A heap, a stack, a bottle and a rack The Stack Canary Birds The heap Answer: The first three segments are: code , read-only data and global data for the running process gurka. Then there is a segment for the heap . The segment marked with

399 views • 10 slides
Fibonacci Heap Group Paradox December 21, 2016 Contents 1. Introduction 2. Operations 3. Why

Fibonacci Heap Group Paradox December 21, 2016 Contents 1. Introduction 2. Operations 3. Why

Fibonacci Heap Group Paradox December 21, 2016 Contents 1. Introduction 2. Operations 3. Why it called Fibonacci (the proof) Priority Queue in Dijkstra Fibonacci Heap Operation Binary Heap Fibonacci Heap Find-Min O (1) O (1) Insert O (

465 views • 21 slides
6.006- Introduction to Priority Queue Algorithms A data structure implementing a set S of

6.006- Introduction to Priority Queue Algorithms A data structure implementing a set S of

Heap Menu Implementation of a priority queue Priority Queues An array, visualized as a nearly complete binary tree Max Heap Property: The key of a node is than the keys of Heaps its children (Min Heap defined

202 views • 7 slides
An Analysis of Multicore Specific Optimization in MPI Implementations Pengqi Cheng & Yan Gu

An Analysis of Multicore Specific Optimization in MPI Implementations Pengqi Cheng & Yan Gu

An Analysis of Multicore Specific Optimization in MPI Implementations Pengqi Cheng & Yan Gu Tsinghua University Introduction CPU frequency stalled Solution: Multicore OpenMP shared memory MPI Message Passing

281 views • 24 slides
Rudiments of Presburger Arithmetic St ephane Demri (demri@lsv.fr) September 30th, 2016 Slides

Rudiments of Presburger Arithmetic St ephane Demri (demri@lsv.fr) September 30th, 2016 Slides

Rudiments of Presburger Arithmetic St ephane Demri (demri@lsv.fr) September 30th, 2016 Slides and lecture notes http://www.lsv.fr/demri/notes-de-cours.html https://wikimpri.dptinfo.ens-cachan.fr/doku. php?id=cours:c-2-9-1 About the

1.32k views • 74 slides
Simplification by Rotation for Frobenius/Hopf algebras Aleks Kissinger September 9, 2017 The

Simplification by Rotation for Frobenius/Hopf algebras Aleks Kissinger September 9, 2017 The

Simplification by Rotation for Frobenius/Hopf algebras Aleks Kissinger September 9, 2017 The goal Simplification for special commutative Frobenius algebras: = = = = = = = = = = = The goal Simplification for commutative Hopf

468 views • 27 slides
Eclipse 4 Migration Tips Eclipse Con Reston 2016 8 March 2016 Table Table of contents I - M i g

Eclipse 4 Migration Tips Eclipse Con Reston 2016 8 March 2016 Table Table of contents I - M i g

Eclipse 4 Migration Tips Eclipse Con Reston 2016 8 March 2016 Table Table of contents I - M i g r a t i o n 5 A. Migration to

310 views • 20 slides
Crick s early Hypothesis Revisited Or The Existence of a Universal Coding Frame Ryan Rossi,

Crick s early Hypothesis Revisited Or The Existence of a Universal Coding Frame Ryan Rossi,

Crick s early Hypothesis Revisited Or The Existence of a Universal Coding Frame Ryan Rossi, Jean-Louis Lassez and Axel Bernal UPenn Center for Bioinformatics BIOINFORMATICS The application of computer technology to the management and

1.03k views • 48 slides
Satisfjability Checking and Conjunctive Query Answering in Description Logics with Global and

Satisfjability Checking and Conjunctive Query Answering in Description Logics with Global and

Satisfjability Checking and Conjunctive Query Answering in Description Logics with Global and Local Cardinality Constraints Franz Baader Bartosz Bednarczyk Sebastian Rudolph Technische Universitt Dresden and University of Wrocaw

612 views • 21 slides
Bounded Arithmetic in Free Logic Yoriyuki Yamagata CTFM, 2013/02/20 Busss theories 2

Bounded Arithmetic in Free Logic Yoriyuki Yamagata CTFM, 2013/02/20 Busss theories 2

Bounded Arithmetic in Free Logic Yoriyuki Yamagata CTFM, 2013/02/20 Busss theories 2 Language of Peano Arithmetic + # a # b = 2 | | BASIC axioms PIND , , ( ) 2

679 views • 31 slides
Operating System Principles: Memory Management CS 111 Operating Systems Peter Reiher Lecture 5

Operating System Principles: Memory Management CS 111 Operating Systems Peter Reiher Lecture 5

Operating System Principles: Memory Management CS 111 Operating Systems Peter Reiher Lecture 5 CS 111 Page 1 Fall 2016 Outline What is memory management about? Memory management strategies: Fixed partition strategies Dynamic

1.06k views • 62 slides

More recommend