desesc

Dromajo ESESC

DESESC is an evolution from SESC, but it does not use semantic versioning. The reason is that after each major change (new letter) there is a period of "beta" unstable which is akind of 0.x version in semantic versioning.

Each major release adds a letter:

SESC

MIPS based OoO core with multicore and TLS support

ESESC

Major changes from SESC:

• QEMU based emulator (MIPS/RISC-V/ARM)
• Power/thermal
• Statistical sampling

DESESC:

Major changes from ESESC:

• Dromajo instead of QEMU
• Specter Safe OoO model
• Major rework for modern C++
• New configuration

Setup

DESESC requires gcc (or clang) versions 10 or newer and bazelisk.

Install bazelisk

Install Bazelisk

Bazelisk is a wrapper around bazel that allows you to use a specific version.

If you do not have system permissions, you can install a local bazelisk

npm install  @bazel/bazelisk
alias bazel=$(pwd)/node_modules/\@bazel/bazelisk/bazelisk.js

You can also install it directly if you have administrative permissions:

macos:

brew install bazelisk.

Linux:

go install github.com/bazelbuild/bazelisk@latest
export PATH=$PATH:$(go env GOPATH)/bin

Arch linux:

pacaur -S bazelisk  # or yay or paru installers

Dhrystone example

To build desesc with debug version (debug/develop)

bazel build -c dbg //main:desesc

To build desesc with release version (long simulations)

bazel build -c dbg //main:desesc

To run the default simulation (dhrystone):

./bazel-bin/main/desesc -c ./conf/desesc.toml

Konata

You may want to use https://github.com/shioyadan/Konata to see the traces generated