On 16/12/2014 00:40, Oleg Ovechko wrote: > A. Host Windows, 6 cores (no HT, turbo boost off): 6:23 (+- 10 secs) > B. Host Windows, 1 CPU core (other are turned off in BIOS): 7:13 (+-10 secs) > C. Host 1 core, Guest Windows 1 core: 7:15 - same as B, no degradation > D. Host 6 cores, Guest Windows 1 core: 7:57 > E. Host 6 cores, Guest Windows 4 cores: 8:17 What is your benchmark? Windows sometimes has scalability problems due to the way it does timing. Try replacing "-cpu host" with "-no-hpet -cpu host,hv_time,hv_vapic". > 3. Also I am unsure about HT. When I specify "cores=2", I suppose you mean "threads=2". > is there any > guaranty that whole core with both HT parts is passed to VM? Or it can be > mix of two real cores with separate caches? It will be a mix. Do not specify HT in the guest, unless you have HT in the host _and_ you are pinning the two threads of each guest core to the two threads of a host core. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
