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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - glCopyTexSubImage2D is much slower than glDrawArrays"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98478#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - glCopyTexSubImage2D is much slower than glDrawArrays"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98478">bug 98478</a>
from <span class="vcard"><a class="email" href="mailto:dongseong.hwang@intel.com" title="Dongseong Hwang <dongseong.hwang@intel.com>"> <span class="fn">Dongseong Hwang</span></a>
</span></b>
<pre>Here's intel_gpu_top data
When using glDrawArrays
render busy: 48%: █████████▋ render space:
67/16384
task percent busy
CS: 49%: █████████▉ vert fetch: 650289482
(650202512/sec)
GAM: 43%: ████████▋ prim fetch: 216764414
(216735424/sec)
VS: 11%: ██▎ VS invocations: 636105016
(636047896/sec)
SVG: 10%: ██ GS invocations: 0 (0/sec)
VF: 10%: ██ GS prims: 0 (0/sec)
GAFS: 9%: █▉ CL invocations: 216759538
(216730978/sec)
CL: 9%: █▉ CL prims: 97832823 (97804263/sec)
SF: 5%: █ PS invocations: 18278204160
(-430295856/sec)
DS: 4%: ▉ PS depth pass: 4741623475
(77865535/sec)
SOL: 3%: ▋
GS: 3%: ▋
SDE: 2%: ▌
TDG: 2%: ▌
TE: 1%: ▎
HS: 1%: ▎
GAFM: 1%: ▎
RS: 1%: ▎
VFE: 0%:
TSG: 0%:
URBM: 0%:
When using glCopyTexSubImage2D
render busy: 53%: ██████████▋ render space:
38/16384
task percent busy
CS: 55%: ███████████ vert fetch: 421770029 (15081065/sec)
GAM: 49%: █████████▉ prim fetch: 140591035 (5026989/sec)
VS: 14%: ██▉ VS invocations: 411982523
(14758688/sec)
SVG: 14%: ██▉ GS invocations: 0 (0/sec)
GAFS: 12%: ██▌ GS prims: 0 (0/sec)
VF: 12%: ██▌ CL invocations: 140587183 (5027260/sec)
CL: 11%: ██▎ CL prims: 63411022 (2244392/sec)
SF: 7%: █▌ PS invocations: 9766779712
(286387776/sec)
DS: 6%: █▎ PS depth pass: 2582256091
(72883919/sec)
SOL: 5%: █
GS: 5%: █
SDE: 3%: ▋
TDG: 3%: ▋
HS: 2%: ▌
TE: 2%: ▌
GAFM: 1%: ▎
TSG: 0%:
RS: 0%:
VFE: 0%:
URBM: 0%:</pre>
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