Keir Fraser wrote: > On 13/4/07 13:27, "Andi Kleen" <andi@xxxxxxxxxxxxxx> wrote: > >>> LOCKed instruction suck really badly on the netburst microarchitecture (like >>> factor of 10x, or not far off). I think it's probably because of their side >>> effect of serialising memory accesses, causing horrible pipeline stalls. >> Unfortunately they tend to be HyperThreaded usually (except for early ones >> and Celerons) and need the LOCK anyways. > > Fair point, although quite a few people disable HT. Note we're talking a UP-only hack. -hpa _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
