Hi Avi, I want you look at this patch before discussing about our patch set. This patch sould itself worth it, I belive, and shows how much improvements we can expect from our dirty bitmap works. Note: this will not conflict with our future works! Thanks, Takuya ** Simple test ** 1. What we did I measured the time needed for the get dirty log ioctl during playing with Ubuntu installer, in which VGA is logging, and compared the result to that of the original version. 2. Test environment Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz (No EPT support) With latest qemu-kvm.git This test is for clarifying the micro performance, and is not intended to verify what we can expect on Enterprize servers: so I used my laptop. 3. Results I picked up three typical parts for comparison. - TYPE1 original ---------------------------------------- slot=6, slot.len= 32768, usec= 65 slot=7, slot.len= 32768, usec= 24 slot=6, slot.len= 32768, usec= 26 slot=7, slot.len= 32768, usec= 23 slot=6, slot.len= 32768, usec= 24 slot=7, slot.len= 32768, usec= 24 slot=6, slot.len= 32768, usec= 25 slot=7, slot.len= 32768, usec= 25 ---------------------------------------- with my patch ---------------------------------------- slot=6, slot.len= 32768, usec= 3 slot=7, slot.len= 32768, usec= 3 slot=6, slot.len= 32768, usec= 3 slot=7, slot.len= 32768, usec= 2 slot=6, slot.len= 32768, usec= 3 slot=7, slot.len= 32768, usec= 2 slot=6, slot.len= 32768, usec= 3 slot=7, slot.len= 32768, usec= 3 ---------------------------------------- - TYPE2 original ---------------------------------------- slot=6, slot.len= 32768, usec= 158 slot=7, slot.len= 32768, usec= 26 slot=6, slot.len= 32768, usec= 157 slot=7, slot.len= 32768, usec= 26 slot=6, slot.len= 32768, usec= 157 slot=7, slot.len= 32768, usec= 26 slot=6, slot.len= 32768, usec= 158 slot=7, slot.len= 32768, usec= 27 ---------------------------------------- with my patch ---------------------------------------- slot=6, slot.len= 32768, usec= 117 slot=7, slot.len= 32768, usec= 2 slot=6, slot.len= 32768, usec= 124 slot=7, slot.len= 32768, usec= 1 slot=6, slot.len= 32768, usec= 121 slot=7, slot.len= 32768, usec= 1 slot=6, slot.len= 32768, usec= 72 slot=7, slot.len= 32768, usec= 2 ---------------------------------------- - TYPE3 original ---------------------------------------- slot=5, slot.len= 16777216, usec= 9 slot=6, slot.len= 32768, usec= 6 slot=7, slot.len= 32768, usec= 7 slot=5, slot.len= 16777216, usec= 11 slot=6, slot.len= 32768, usec= 7 slot=7, slot.len= 32768, usec= 7 slot=5, slot.len= 16777216, usec= 14 slot=6, slot.len= 32768, usec= 8 slot=7, slot.len= 32768, usec= 8 slot=5, slot.len= 16777216, usec= 11 slot=6, slot.len= 32768, usec= 9 slot=7, slot.len= 32768, usec= 9 ---------------------------------------- with my patch ---------------------------------------- slot=5, slot.len= 16777216, usec= 2 slot=6, slot.len= 32768, usec= 2 slot=7, slot.len= 32768, usec= 1 slot=5, slot.len= 16777216, usec= 2 slot=6, slot.len= 32768, usec= 2 slot=7, slot.len= 32768, usec= 2 slot=5, slot.len= 16777216, usec= 2 slot=6, slot.len= 32768, usec= 1 slot=7, slot.len= 32768, usec= 1 slot=5, slot.len= 16777216, usec= 3 slot=6, slot.len= 32768, usec= 2 slot=7, slot.len= 32768, usec= 2 ---------------------------------------- -- 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
