Instrumentation of Xen VMs for efficient VM scheduling and capacity planning in hybrid clouds. Kurt Vermeersch Coordinator: Sam Verboven.

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Presentation transcript:

Instrumentation of Xen VMs for efficient VM scheduling and capacity planning in hybrid clouds. Kurt Vermeersch Coordinator: Sam Verboven

1 Goal Phase 1: Extract information about running Xen guests and present it in a clear way. Phase 2: Mapping of a VM to a profile used by cloud providers.

2 Background Importance of virtualization today due to the advantages of server consolidation (e.g. cost reduction). Virtualization in itself does not guarantee efficiency, several system-level performance metrics should be monitored. This data should be used to make intelligent scheduling decissions.

3 XenBench Startup -Initialize app -Stress system Gathering -Start profiling tools Stopping -Write unaltered output to file Analysation -Parse files & present info in a clear way

4 Information Gathering XenMon -CPU per VM per Core: usage, blocked, waited OProfile -L2 Cache hits and misses -Patch linux kernel DomU Kernel -MB/s read and write per VM

5 Xenbaked Creates samples based on XenTrace events in XenBaked. Determine CPU usage per VM in frontend based on Shared Memory records (mmap).

6 Overview

7 Output

8 Overhead Measure by using a CPU Benchmark -Not free: SPEC CPU2006, MultiBench,… -No multicore support: CoreMark, SuperPi,… -Solution: LinPack, determines the MFLOPS the system is able to achieve Comparing the amount of MFLOPS on an idle system and on a system running our tool, gives an idea about the overhead.

9 Conclusion What to do next? -Finish the CLI tool & create GUI -Try to further minimize measurement errors -Analyze and minimize overhead of the tool -Documentation of tool & online release Questions? Blog: