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SimpleScalar Tool Set, Version 2

SimpleScalar Tool Set, Version 2. CSE 323 Department of Computer Engineering. A Computer Architecture Simulator. What is an architectural simulator? Tool that reproduces the behavior of a computing device What is SimpleScalar?

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SimpleScalar Tool Set, Version 2

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  1. SimpleScalar Tool Set, Version 2 CSE 323 Department of Computer Engineering

  2. A Computer Architecture Simulator • What is an architectural simulator? • Tool that reproduces the behavior of a computing device • What is SimpleScalar? • A simulator that performs fast, flexible and accurate simulation of modern processors that implement the SimpleScalar Architecture. • What is a SimpleScalar Architecture? • A close derivative of the MIPS architecture.

  3. Simulation • How does the simulation? • Takes binaries compiled for the SimpleScalar architecture and simulates their execution on processor simulator.

  4. Simulation Suite Overview

  5. Binaries? • How to create binaries for the architecture? • The simulator provides sets of precompiled binaries. • Also provides a modified version of GCC that allows you to compile your own binaries.

  6. SimpleScalar Overview Simulator source Host C compiler Results

  7. How to make a binary for SimpleScalar • You will be working on TUX machine (IP:10.2.7.254) with your accounts and passwords. • SimpleScalar is located in /usr/local/ • Copy the makefile into your own directory. • cp /usr/local/simplescalar/simplesim-2.0/tests/src/Makefile ./ • Add the necessary information about your c file into the make file in order to compile it. • vi Makefile myprog1:myprog1.c $(CC) $(CFLAGS) -o myprog1 myprog1.c

  8. How to make a binary for SimpleScalar • Compile your c code • make myprog1 • Run the simulator • /usr/local/simplescalar/simplesim-2.0/sim-cache myprog1

  9. Global Simulator Options (cont.) • Supported on all simulators • -h - print simulator help message • -d - enable debug message • -i - start up in DLite! debugger • -q - quit immediately • -config <file> - read config parameters from <file> • -dumpconfig <file> - save config parameters into <file>

  10. Cache Simulation Options • -cache:dl1 <config> l1 data cache • -cache:dl2 < config > l2 data cache • -cache:il1 < config > l1 inst cache • -cache:il2 < config > l2 inst cache • -tlb:itlb < config > instruction TLB • -tlb:dtlb < config > data TLB

  11. sim-cache

  12. sim-cache …(cont.) • The cache size is therefore the product of, <nsets>, <bsize>, <assoc>. • il1:256:32:1:1 (8KB)

  13. sim-cache …(cont.)

  14. Example • myprog1.c • #define N 1024 main() { int i,j,x[N][N]; for(i=0;i<N;i++) for(j=0;j<N;j++) x[i][j]=2*x[i][j]; }

  15. Example (cont’d) • adding below ones into the Makefile myprog1:myprog1.c $(CC) $(CFLAGS) -o myprog1 myprog1.c • Compile myprog1.c • make myprog1 • Run the simulator with sim-cache defaults • /usr/local/simplescalar/simplesim-2.0/sim-cache myprog1

  16. Example (cont’d) • Collect the output • il1.misses 381 # total number of misses • il1.miss_rate 0.0001 # miss rate (i.e., misses/ref) • dl1.misses 131512 # total number of misses • dl1.miss_rate 0.0626 # miss rate (i.e., misses/ref) • ul2.misses 65933 # total number of misses • ul2.miss_rate 0.2506 # miss rate (i.e., misses/ref)

  17. Example (cont’d) • Run the binary for the following cache system • unified cache with 256 sets x 32 bytes per block • /usr/local/simplescalar/simplesim-2.0/sim-cache -cache:il1 dl1 -cache:dl1 ul1:256:32:1:l -cache:dl2 none -cache:il2 none myprog1 • Collect the results • Comment on the results

  18. More Information • http://www.simplescalar.com

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