/Workload-Characterisation

Primary LanguageC

This repository is part of B.Tech. Project.

Branches

Master

  • Contains the codes for perf data generation and plot from cpu2006 benchmark, building and running the codes.
  • Codes for noise reduction in the data and phase detection.
  • Contains the basic plugin tracelog for just producing dump of instructions of the application running on guest OS.

xv6

  • Changes to the Operating system including insertion of marker instruction(nops here) on receiving -XOXO argument in exec system call.
  • Plugin Tracelog modified to recognise these marker instructions and start the tracing. It would also take argument instruction interval of the application execution to print traces for.

linux

  • Changes to the Operating System including insertion of marker instruction(int 100) on receiving -XOXO argument in exec system call.
  • Changes to Qemu to handle this interrupt with interrupt no. 100.
  • Plugin Tracelog modified to recognise these marker instructions and start the tracing. It would also take argument instruction interval of the application execution to print traces for.

STEP 0 : Building the xv6 image

Run make for xv6 which generates fs.img and xv6.img.

STEP 1 : To configure Qemu

./configure --target-list="i386-softmmu,x86_64-softmmu" --enable-trace-backends=simple,dtrace,log,syslog,ftrace,nop --enable-debug-tcg --enable-gtk --enable-debug-info --enable-debug --enable-debug-stack-usage --disable-kvm --disable-xen make -j4

STEP 2 : Generating object file for the plugin

cd contrib/plugins make

STEP 3 : Running the plugin

To run only the plugin

./qemu-system-x86_64 -drive file=../../xv6/fs.img,index=1,media=disk,format=raw -drive file=../../xv6/xv6.img,index=0,media=disk,format=raw -smp 1 -m 2048 -plugin ../contrib/plugins/libtracelog.so -d plugin,nochain --accel tcg,thread=single

To compare the plugin count obtained with the icount already present in the source code

-icount option enables counting the count of instructions, through which the softmmu/icount.c files output can be observed.

./qemu-system-x86_64 -drive file=../../xv6/fs.img,index=1,media=disk,format=raw -drive file=../../xv6/xv6.img,index=0,media=disk,format=raw -smp 1 -m 2048 -plugin ../contrib/plugins/libtracelog.so -d plugin,nochain -icount shift=auto --accel tcg,thread=single

To print only the icount

./qemu-system-x86_64 -drive file=../../xv6/fs.img,index=1,media=disk,format=raw -drive file=../../xv6/xv6.img,index=0,media=disk,format=raw -smp 1 -m 2048 -icount shift=auto