Re: [Qemu-devel] [PATCHv3 3/6] ui/vnc: optimize dirty bitmap tracking

2014-01-06 Thread Wenchao Xia
于 2014/1/6 2:02, Peter Lieven 写道: vnc_update_client currently scans the dirty bitmap of each client bitwise which is a very costly operation if only few bits are dirty. vnc_refresh_server_surface does almost the same. this patch optimizes both by utilizing the heavily optimized function

Re: [Qemu-devel] [PATCHv3 3/6] ui/vnc: optimize dirty bitmap tracking

2014-01-06 Thread Peter Lieven
On 06.01.2014 11:08, Wenchao Xia wrote: 于 2014/1/6 2:02, Peter Lieven 写道: vnc_update_client currently scans the dirty bitmap of each client bitwise which is a very costly operation if only few bits are dirty. vnc_refresh_server_surface does almost the same. this patch optimizes both by

Re: [Qemu-devel] [PATCHv3 3/6] ui/vnc: optimize dirty bitmap tracking

2014-01-06 Thread Peter Lieven
On 06.01.2014 11:08, Wenchao Xia wrote: 于 2014/1/6 2:02, Peter Lieven 写道: vnc_update_client currently scans the dirty bitmap of each client bitwise which is a very costly operation if only few bits are dirty. vnc_refresh_server_surface does almost the same. this patch optimizes both by

Re: [Qemu-devel] [PATCHv3 3/6] ui/vnc: optimize dirty bitmap tracking

2014-01-06 Thread Wenchao Xia
于 2014/1/6 21:31, Peter Lieven 写道: On 06.01.2014 11:08, Wenchao Xia wrote: 于 2014/1/6 2:02, Peter Lieven 写道: vnc_update_client currently scans the dirty bitmap of each client bitwise which is a very costly operation if only few bits are dirty. vnc_refresh_server_surface does almost the same.

[Qemu-devel] [PATCHv3 3/6] ui/vnc: optimize dirty bitmap tracking

2014-01-05 Thread Peter Lieven
vnc_update_client currently scans the dirty bitmap of each client bitwise which is a very costly operation if only few bits are dirty. vnc_refresh_server_surface does almost the same. this patch optimizes both by utilizing the heavily optimized function find_next_bit to find the offset of the next