tallinn university of technology department of computer engineering ati.ttu.ee jaan raik diamond:...
TRANSCRIPT
Tallinn University of TechnologyDepartment of Computer Engineering
Department of Computer Engineeringati.ttu.ee
Jaan Raik
DIAMOND: Targeting Verification and Reliability Issues in Systems
DIAMOND: Targeting Verification and Reliability Issues in Systems
EU FP7 STREP Project DIAMOND A holistic view of design and soft errors
Success stories: FoREnSiC (C, system-level) zamiaCAD (VHDL/Verilog/SC, RTL)
Follow-up projects Significance to CEBE
2
Toyota problems: reliability or verification?
3
CEBE IAB meeting 2013
4
The DIAMOND conceptSoft-errors caused by cosmic
radiation
DIAMOND’sdiagnosis/correction
methods
Soft-errors in new generation chips due to background radiation
Electronic systems fail while working in the field
Design mistakes made by the engineer
CEBE IAB meeting 2013
5
DIAMOND: Objectives
A unified, holistic diagnostic model for bugs and soft errors at all levels;
Automated localisation & correction techniques based on the unified model, both pre-silicon & post-silicon;
Implementation of a reasoning framework for localisation & correction, encompassing word-level techniques, formal, semi-formal, and dynamic techniques.
CEBE IAB meeting 2013
DIAMOND Kick-off, Tallinn, February 2-3, 20106
DIAMOND: FP7 collaborative research
FP7-2009-ICT-4-248613 DIAMOND - Diagnosis, Error Modelling and Correction for Reliable Systems Design
Start January 2010; total budget 3.8M € (EU contribution 2.9M €); 462.5 PM
The IBM logo is a registered trademark of International Business Machines Corporation (IBM) in the United States and other countries.
CEBE IAB meeting 2013
Verification and debug
7
• ~2/3 of development time for verification• ~2/3 of verification time for debug• Thus, nearly half of the development cycle!• Automation of the debug step needed...
Debug
Verification
CEBE IAB meeting 2013
Traditional debug flow
8
Verification
Design
Spec
Error!
Counter-examples (waveforms), failed assertions, ...
???
• Too little information• Too much information
CEBE IAB meeting 2013
Automated debug flow
9
Verification
Design
Spec
Error!
Corrected design, Repair log, ...
Error localization
Error correction
CEBE IAB meeting 2013
Maksim Jenihhin
DIAMOND Debug Tools
FoREnSiC Formal automated debug
environment for ESL HW in C zamiaCAD
A highly scalable framework for design analysis and automated debug at RTL (VHDL-centric)
10
CEBE IAB meeting 2013
11
FoREnSiC
FoREnSiC: Formal Repair Environment for Simple C For system-level HW Developed by TU Graz, University of Bremen and TUT Front-end converting simple C descriptions to
flowchart model, different debug back-ends Open source and available at:
http://www.informatik.uni-bremen.de/agra/eng/forensic.php
CEBE IAB meeting 2013
12
Forensic Flow
CEBE IAB meeting 2013
13
Available FoREnSiC Back-Ends
FoREnSiC includes 3 complementary back-ends: Symbolic back-end (TU Graz)
Symbolic+concolic engines and model-based diagnosis for localization; template-based correction.
Cut-based back-end (University of Bremen) Formally verifies the equivalence between a C program and
an implementation in HDL.
Simulation-based back-end (Tallinn University of Technology, University of Verona) Intended for correcting larger programs. Statistical
localization + mutation-based correction
CEBE IAB meeting 2013
Statistical localization + mutations
14
CEBE IAB meeting 2013
Dynamic slicing for localization
15
CEBE IAB meeting 2013
Statistical analysis
Ranking according to suspiciousness:
16
Suspiciousness score
Circuit blocks
CEBE IAB meeting 2013
Fault model for correction
17
MUTATION OPERATOR C OPERATORS/EXAMPLES AOR (arithmetic operator replacement) +, -, *, /, % ROR (relational operator replacement) ==, !=, >, <, >=, <= LCR (logical connector replacement) &&, || ASOR (assignment operator replacement) +=, -=, *=, /=, %=, =
UOR (unary operator replacement) +, -, ~, ! Bitwise operator replacement <<, >>, &, |, ^ Bitwise assignment operator replacement <<=, >>=, &=, |=, ^=
Increment/decrement operator replacement x++, ++x, x--, --x
Number mutation (decimal digit replacement in integers, floats and array indexes)
0...9
Constant replacement unary minus/ unary plus/ zero +C, 0, -C
CEBE IAB meeting 2013
Design error correction experiments
18
CEBE IAB meeting 2013
Maksim Jenihhin
zamiaCAD team and cooperation Günter Bartsch, Stuttgart – founder Rainer Dorsch, Stuttgart – Bosch/IBM Tallinn University of Technology
Anton Tšepurov, PhD student Maksim Jenihhin Valentin Tihhomirov, PhD student Saif Abrar PhD student Jaan Raik
IBM Faculty Award 2011/2012
19
CEBE IAB meeting 2013
Maksim Jenihhin
zamiaCAD flow
http://zamiacad.sf.net Front-end currently
supports VHDL Object database ZDB
Persistence Scalability Custom designed Highly optimized for
performance
20
CEBE IAB meeting 2013
Maksim Jenihhin 21
CEBE IAB meeting 2013
Maksim Jenihhin
zamiaCAD Evaluation A case study on ROBSY microprocessor 17k lines of VHDL code Error localization based on statistical ranking
22
Bug data The proposed automated localization Manual
debug Statistical Ranking Cone inspection Time (min)
Bug name
Failed/Passed Test cases
Statements cand. / %
Located stm. rank
Cone dir. / depth
Added stm. cand.
Time
Bug 1 4 / 24 14 / 2.9% 3 - - 2 4 hours Bug 2 2 / 26 7 / 1.4% 1 - - 2 2 hours Bug 3 2 / 26 20 / 4% 3 - - 2 4 hours Bug 4 1 / 27 6 / 1.2% (1) fw / 1 21 2+(5) 4 hours Bug 5 2 / 26 11 / 2.3% 1 - - 2 2 hours Bug 6 1 / 27 8 / 1.7% (1) bw / 1 13 2+(10) 5 hours Bug 7 1 / 27 21 / 4.3% (1) fw / 1 10 2+(1) 1 hours
CEBE IAB meeting 2013
23
DIAMOND results
Publications 2 papers at IEEE D&T, 2 papers at JETTA, ...
PhD defenses 2012, S.Kostin, A.Tšertov, A.Karputkin, T.Viilukas 2013, I.Aleksejev, A.Tšepurov, U.Reinsalu
Follow-up projects FP7 STREP BASTION 3 EU COST Actions 1 Estonian ICT programme
CEBE IAB meeting 2013
24
ICT COST Actions
Rich-model toolkit: an infrastructure for reliable computer systems 2009 oct. – 2013 oct.
Median: manufacturable and dependable multicore architectures at nanoscale 2011 dec. – 2015 nov.
Trustworthy Manufacturing and Utilization of Secure Devices (TRUDEVICE) 2012- 2016
CEBE IAB meeting 2013
25
ICTP FUSETEST
Functional Self‐Test, Self‐Diagnosis and Failure Analysis for Integrated Electronics Systems (FUSETEST)
Partner: Testonica 2013 apr. – 2015 aug.
CEBE IAB meeting 2013
Significance to CEBE
Verification and correction of bugs in the CEBE processor family
Application of design error correction engines in fine-tuning medical algorithms
26
Thank you!
27
More info: www.fp7-diamond.eu