Introduction

Performance numbers for compcache under various workloads.

Available data

Positive Cases

• compcache on LTSP (benchmark) (summary): by Nai Xia
• compcache on under-500MHz machine (benchmark): by John McCabe-Dansted
• Simulating Netbooks/Thinclients (benchmark): Tests on Linux VM with RAM: 512MB, vCPU: 1. We use simple scan benchmark - it does scans of anonymous mapped memory, both cyclic and use once.
• Comparing swap R/W times for hard-disk and ramzswap (here).

Negative Cases

• Iozone: Workload with large filesystem cache requirement (results).

Need data

• PlayStation3: Some people reported running ramzswap successfully on PS3 (see  Issue #11 ). It has just 256 MB of XDR main memory.
• Virtualization: KVM Guest VM memory is anonymous w.r.t Linux host. Also, with recent MMU notifier support in Linux kernel, almost all guest memory is swappable! Running compcache at hypervisor layer (Linux kernel here) allows us to compress any part of guest memory and for any kind of Guest OS (Linux, Windows etc.). With compcache on Linux host, we expect to be able to run more no. of VMs for given amount of total host memory.
• Embedded devices: TODO