Stella Integrated scheduler

Stella integrated scheduler is a scheduling architecture for providing required performance to virtual machines running concurrently on a virtualized server. The integrated scheduler includes different types of resource scheduler in a physical server, CPU, block and Network I/O, to support diverse workload running on virtual machines with different characteristics (CPU-intensive or I/O-intensive).

PREREQUISITE

Because GoS is designed for virtualized environment equipped with SSDs, it requires following environments.

• KVM installed Linux
• SSD equipped virtual machines
• Linux kernel 4.4 (recomend to use Ubuntu 16.04)

SETTING

For the experiment, source should be modified.

1. Block allocation

   Modify unsigned long partition variable in oios-iosched.c file the array consis of {start block number, end block number}

2. Priority(performance) ratio of OIOS

   Modify static int prior[] variable in oios-iosched.c file It only support 5 VMs

3. Number of vcpus

   Modify #define VCPU_NUM 10 variable in gos.h file The VCPU_NUM is Number of cores in the CPUs