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Sunday, April 26, 2020 | History

2 edition of Compiler-assisted multiple instruction rollback recovery using a read buffer found in the catalog.

Compiler-assisted multiple instruction rollback recovery using a read buffer

Compiler-assisted multiple instruction rollback recovery using a read buffer

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  • 13 Currently reading

Published by Coordinated Science Laboratory, College of Engineering, University of Illinois at Urbana-Champaign, National Aeronautics and Space Administration in [Urbana, IL], [Washington, DC .
Written in English

    Subjects:
  • Fault-tolerant computing.,
  • Data recovery (Computer science),
  • Compilers (Computer programs)

  • Edition Notes

    Other titlesCompiler assisted multiple instruction rollback recovery using a read buffer.
    StatementN.J. Alewine ... [et al.].
    SeriesNASA contractor report -- NASA CR-193175.
    ContributionsAlewine, Neal J., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15386202M


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Compiler-assisted multiple instruction rollback recovery using a read buffer Download PDF EPUB FB2

ALEWINE ET AL.: COMPILER-ASSISTED MULTIPLE INSTRUCTION ROLLBACK RECOVERY USING A READ BUFFER strates the improvement gained by allowing either source bus access to either FIFO. Configuration B1 was the most efficient of. Compiler-Assisted Multiple Instruction Rollback Recovery Using a Read Buffer WORK UNIT ACCESSION NO.

PERSONAL AUTHOR(S) ALEWINE, N. J., S.-K. 13a. TYPE OF REP'ORT COVERED Technical. FROM TO SUPPLEMENTARY NOTATION Chen, W.

Fuchs, and W.-M. Hwu REPORTMay _a_Mocrth, Oa_ IS. PAGE31 CO. This paper describes compiler-assisted techniques to achieve multiple instruction rollback recovery. We observe that some data hazards resulting from instruction rollback can be resolved.

In the event of a rollback of N instructions, the contents of the read buffer are flushed in reverse order and stored back to the register file. For an on-path hazard, the path taken after the rollback will be the same as the path taken prior to rollback and each read of r, will produce the same value as before.

by the compiler. Compiler-based multiple instruction rollback reduces the requirement for data redundancy logic present in hardware-based instruction rollback approaches. Compiler-Assisted Instruction Rollback Compiler-based multiple instruction rollback resolves all data hazards using compiler transforma-tions.

Alewine, Compiler-assisted Multiple Instruction Rollback Recovery using a Read Buffer. PhD thesis, Tech.

Rep. CRHC, University of Illinois at Urbana-Champaign, PhD thesis, Tech. Rep. CRHC, University of Illinois at Urbana-Champaign, Cited by: 5. This paper describes compiler-assisted techniques to achieve multiple instruction rollback recovery. We observe that some data hazards resulting from instruction rollback can be resolved efficiently by providing an operand read buffer while others are resolved more efficiently with compiler.

Multiple instruction rollback (MIR) is a technique to provide rapid recovery from transient processor failures and was implemented in hardware by researchers. Compiler-assisted techniques to achieve multiple instruction rollback recovery are addressed.

It is observed that data some hazards resulting from instruction rollback can be resolved more efficiently by providing hardware redundancy while others are resolved more efficiently with compiler : Neal Jon Alewine.

Get this from a library. Compiler-assisted multiple instruction rollback recovery using a read buffer. [Neal J Alewine; United States. National Aeronautics and Space Administration.;].

Compiler-based MIR designs have also been developed which remove rollback data hazards directly with data flow manipulations, thus eliminating the need for most data redundancy hardware.

This thesis focuses on compiler-assisted techniques to achieve multiple instruction rollback by: C parallel recovery read buffer free. The parallel recovery coordinator is waiting for a log read buffer to be released by all recovery slaves.

Only after every recovery slave finishes applying redo from a log read buffer, can the buffer be used by the coordinator to issue the next log read.

Chen S, Alewine N, Kent Fuchs W and Hwu W () Compiler-Assisted Multiple Instruction Rollback Recovery Using a Read Buffer, IEEE Transactions on Computers,(), Online publication date: 1-Sep Abstract.

Multiple instruction rollback is a technique developed for recovery from transient processor failures. Speculative execution is a method to increase instruction level parallelism which can be exploited by both super-scalar and VLIW : W.

Kent Fuchs, Neal J. Alewine, Wen-mei Hwu. Experimental results indicate that, for a VLIW machine with P functional units to rollback N instruction words, a read buffer of 2NP entries with the compiler assist can be an effective approach in producing low overhead runtime performance and small code growth, for P = 4, 8, 12, and 16 and N \leq by: 6.

Hardware schemes such as reorder buffers, history buffers, future files [9], and micro- rollback [6] differ in where the updated and old values reside, circuit complexity, and rollback efficiency.

A compiler-assisted approach to implementing mul- tiple instruction retry has recently been developed by the authors [l]. Failure recovery using transactions • Independent rollback and restart Read-set and write-set tracked independently from parent On inner conflict, abort inner transaction but not outer • Map the write-buffer & read/write-set in virtual memory They become unbounded; they can.

The Evolution of Dependable Computing at the University of Illinois Dedicated to Professor Algirdas Avizienis R.

Iyer, W. Sanders, J. Patel, Z. Kalbarczyk Center for Reliable and High-Performance Computing Department of Electrical and Computer Engineering and Coordinated Science Laboratory University of Illinois at Urbana-Champaign.

ARIES Recovery Algorithm ARIES: A Transaction Recovery Method Supporting Fine Granularity Locking and Partial Rollback Using Write-Ahead Logging C. Mohan, D.

Haderle, B. Lindsay, H. Pirahesh, and P. Schwarz ACM Transactions on Database Systems, 17(1), Slides prepared by S.

Sudarshan 2 ©Silberschatz, Korth and Sudarshan Recovery Scheme. plementing rollback recovery when system errors occur a compile-time parameter. [ In case of a detected fault, the system is rolled back to a previous checkpoint containing a consistent This paper extends compiler-assisted multiple in-state of the system [5).

Advanced Recovery: Txn Rollback Rollback of transaction Ti is done as follows: Scan the log backwards 1. If a log record is found, perform the undo and log a special redo-only log record. If a record is found. Rollback the operation logically using the undo information U. Table shows how the average IPC and average AVFs change when all instructions in the instruction queue are squashed after a load miss in the L1 and the L0 caches [23].The simulated machine configuration is the same as used in ACE Analysis Using the Point-of-Strike Fault Model, p.

Chapter L0 cache is the smallest data cache closest to the processor pipeline. to data hazards that result from multiple instruction rollback, and that techniques used to resolve rollback data hazards are applicable to exception and branch repair.

The remainder of the paper is organized as follows. Section 2 gives a brief overview of a compiler-assisted multiple instruction rollback (MIR) scheme to be used.

©Silberschatz, Korth and SudarshanDatabase System Concepts, 5th Edition, Oct 5, Data Access (Cont.)Data Access (Cont.) Transaction transfers data items between system buffer blocks and its private work-area using the following operations: read(X) assigns the value of data item X to the local variable xi.

write(X) assigns the value of. The information in a rollback segment was used during database recovery for generating read-consistent database information and for rolling back uncommitted transactions for users. Space management for these rollback segments was complex, and Oracle has deprecated that method.

Checkpointing provides the backbone for rollback recovery (fault-tolerance), playback debugging, process migration and job swapping. Numerous checkpointing tools have been designed and implemented but few are based on SMP machines for MPI by: 1.

Abstract. This is the MySQL™ Reference Manual. It documents MySQL throughas well as NDB Cluster releases based on version of NDB through ndb, respectively. It may include documentation of features of MySQL versions that have not yet been released.

Using one system read command we can read N characters into a buffer, rather than using one system call per character. If fewer than N characters remain in the input file, then a special character, represented by eof,marks the end of the source file and is different from.

* The second use is to move a string of variable length. * Note that because EX OR's the low byte of the specified register, * there may already be some non-zero bits in the target instruction.

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Installing the DBMS. Once the DBMS has been chosen, you will need to install it. Installing a DBMS is not as simple as popping a CD into a drive and letting the software install itself (or, for you mainframe folks, just using IEBGENER to copy it from a tape).

Therefore, it is a good idea to plan on using multiple storage devices even if you. Databases chapter 9 (B) STUDY. PLAY. passive. A(n) repository is one which requires a person to generate the metadata and place it in the repository.

To support rollforward and rollback recovery, transactions must be written to a(n). before they are applied to the database. occur when a transaction rereads data it has. Irvineinc includes and that flat,every procedure will be decorated by default as if the calling convention were STDCALL.

_calka becomes [email protected] the CDECL calling convention needed for you have to override the default calling convention for the procedure with PROC the underscore will be added automatically.

Restore and Recovery Overview (SQL Server) 04/23/; 10 minutes to read +3; In this article. APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse To recover a SQL Server database from a failure, a database administrator has to restore a set of SQL Server backups in a logically correct and meaningful restore sequence.

Therefore, GT.M restricts the use of the BUFFER_SIZE option to change the current journal-buffer-size as part of an online switch of the journal files.

The default value is blocks. The minimum BUFFER_SIZE is blocks. The maximum BUFFER_SIZE is 32K blocks which means that the maximum buffer you can set for your journal file output is 16MB. Chapter 12 Computer Science II Key Terms.

STUDY. PLAY. Namespaces. Namespaces are a way of allowing you to reuse the names of classes, functions and other items by qualifying the names to indicate different uses. Namespaces basically divide your into sections so that different sections may reuse the same names with different meanings.

Now I encounter ORA "Snapshot too old" error, but rollback tablespace still has so much of free space and only 6 extents are allocated for the rollback segment. and is using a small rollback segment.(like in your book - 1 on 1).Present SCN - for i in (select empid from emp where deptno = 10) loop instead of reading multiple.

Ł one reservation station, multiple entries Ł check source operands for RAW hazards Ł check structural hazards for separate integer, FP, memory units Ł execute instruction Ł result goes to reservation station & reorder buffer In-order commit Ł this & previous uops have completed Ł write fiGflPR registers Ł rollback on interrupts.

The information in a rollback segment was used during database recovery for generating read-consistent database information and for rolling back uncommitted transaction s for users. Space management for these rollback segments was complex, and Oracle has deprecated that method.

Rollback correctly handles transactions spanning multiple journal files created by journal switching; so, if possible, it is better to switch journal files than to stop journaling. You can stop journaling using the ^JRNSTOP routine or by selecting option 2, Stop Journaling, from the ^JOURNAL routine menu.

You should resize the vector in Allocate or use an inserter in the copy in Write. since you know how much space you need and you know you're going to use it all, you may as well do the former. at pm UTC.Use these tables to find message text, cause text, recovery text, and corresponding SQLCODEs and SQLSTATEs.

You can use the following tables with both positive and negative SQLCODEs. Take the absolute value of the SQLCODE, then append it to the letters SQL (for SQLCODEs less than 10 ) or the letters SQ (for SQLCODEs greater than or equal to.Rate Per Second = RPS.

Suggestions to consider for your [mysqld] section. max_connect_errors=10 # from 1 Million to frustrate hackers/crackers at 10 attempts innodb_lru_scan_depth= # from to conserve 90% of CPU cycles used for function read_buffer_size=K # from K to reduce handler_read_next RPS of 13.