Attachment 72317 Details for Bug 58843 – Results of gem_gtt_speed with patch

Results of gem_gtt_speed with patch

gem_gtt_speed_results-patched.txt (text/plain), 1.84 KB, created by Alexander Lam on 2012-12-30 22:08:56 UTC

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Creator: Alexander Lam

Created: 2012-12-30 22:08:56 UTC

Size: 1.84 KB

patch

obsolete

>Acer Aspire One (Intel Atom N270, 945 GSE, i686)
>kernel 3.8-rc1
>xf86-video-intel 2.20.17
>libdrm 2.4.40
>mesa 9.0.1
>xserver 1.13.1
>
>LVDS Downclocking enabled, patch applied:
>[root@lamtop 1 0 tests]$ ./gem_gtt_speed 
>Time to read 16k through a CPU map:              35.683Âµs
>Time to write 16k through a CPU map:             30.951Âµs
>Time to clear 16k through a CPU map:             19.436Âµs
>Time to clear 16k through a cached CPU map:       1.137Âµs
>Time to pwrite 16k through the CPU:              11.599Âµs
>Time to pread 16k through the CPU:               11.194Âµs
>Time to read 16k through a GTT map:             791.271Âµs
>Time to write 16k through a GTT map:             32.875Âµs
>Time to clear 16k through a GTT map:             25.437Âµs
>Time to clear 16k through a cached GTT map:       6.522Âµs
>Time to read 16k (again) through a GTT map:     726.151Âµs
>Time to pwrite 16k through the GTT:               9.589Âµs
>Time to pread 16k through the GTT:               22.369Âµs
>Time to pwrite 16k through the GTT (clflush):    10.348Âµs
>Time to pread 16k through the GTT (clflush):     23.146Âµs
>Now partial writes.
>Time to pwrite 4k through the GTT (clflush):      4.240Âµs
>Time to pread 4k through the GTT (clflush):       7.155Âµs
>
>Setting tiling mode to X
>Time to read 16k through a GTT map:             728.142Âµs
>Time to write 16k through a GTT map:             33.079Âµs
>Time to clear 16k through a GTT map:             25.544Âµs
>Time to clear 16k through a cached GTT map:       6.484Âµs
>Time to read 16k (again) through a GTT map:     728.163Âµs
>
>Setting tiling mode to Y
>Time to read 16k through a GTT map:             832.908Âµs
>Time to write 16k through a GTT map:             33.329Âµs
>Time to clear 16k through a GTT map:             29.228Âµs
>Time to clear 16k through a cached GTT map:      18.190Âµs
>Time to read 16k (again) through a GTT map:     824.466Âµs
>

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Attachments on bug 58843: 72230 | 72231 | 72232 | 72312 | 72313 | 72314 | 72315 | 72316 | 72317

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