Our friends in Cambridge (Real Cambridge, not Backup Cambridge) have spent a nice chunk of money to bring the ARM32 bitblt speedups they provided in '14/5/6 into the ARMv8 world. Quite a few microbenchmarks covering the tests Ben did (and he wrote a testing framework that ran some 10s of thousands of tests) are improved by an order of magnitude, some by 30X and one by 57X !
All the code to date is pushed to https://github.com/bavison/opensmalltalk-vm/tree/Ben with the latest version of the test harnesses at https://github.com/bavison/SqueakBitBltTest
Look for items changed in the last few days ie 25th april or later. I haven't had a chance to do more than glance as yet. I *suspect* Ben has manually edited the generated BitBltPlugin.c file, which will mean doing some diffing and back-porting into Slang. Maybe.
I, for one, welcome our new v8 blit overlords.
tim tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim "#define QUESTION ((bb) || !(bb)) - Shakespeare."
:-O
+1 !!! :-)
I haven't looked into it. Would be nice if it remained compatible with upstream. There is no pull request yet.
Best, Marcel Am 30.04.2021 06:38:37 schrieb tim Rowledge tim@rowledge.org:
Our friends in Cambridge (Real Cambridge, not Backup Cambridge) have spent a nice chunk of money to bring the ARM32 bitblt speedups they provided in '14/5/6 into the ARMv8 world. Quite a few microbenchmarks covering the tests Ben did (and he wrote a testing framework that ran some 10s of thousands of tests) are improved by an order of magnitude, some by 30X and one by 57X !
All the code to date is pushed to https://github.com/bavison/opensmalltalk-vm/tree/Ben with the latest version of the test harnesses at https://github.com/bavison/SqueakBitBltTest
Look for items changed in the last few days ie 25th april or later. I haven't had a chance to do more than glance as yet. I *suspect* Ben has manually edited the generated BitBltPlugin.c file, which will mean doing some diffing and back-porting into Slang. Maybe.
I, for one, welcome our new v8 blit overlords.
tim tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim "#define QUESTION ((bb) || !(bb)) - Shakespeare."
On 2021-04-29, at 11:16 PM, Marcel Taeumel marcel.taeumel@hpi.de wrote:
:-O
+1 !!! :-)
I haven't looked into it. Would be nice if it remained compatible with upstream. There is no pull request yet.
Yeah, nice eh? A couple of months of Ben's time is a lot of money to gift us.
I'm not sure about this pull request stuff but I'll nudge Ben about. In the meantime, if anyone has spare time to actually build from his tree and try it, that would be interesting. I won't have a chance to do that for at least a week, I think, and then my time starts to get very tight as explained at the board meeting.
tim -- tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim Strange OpCodes: SARTRE: (Statement has no purpose)
On 2021-04-30, at 10:14 AM, tim Rowledge tim@rowledge.org wrote:
On 2021-04-29, at 11:16 PM, Marcel Taeumel marcel.taeumel@hpi.de wrote:
:-O
+1 !!! :-)
I haven't looked into it. Would be nice if it remained compatible with upstream. There is no pull request yet.
Yeah, nice eh? A couple of months of Ben's time is a lot of money to gift us.
I'm not sure about this pull request stuff but I'll nudge Ben about. In the meantime, if anyone has spare time to actually build from his tree and try it, that would be interesting.
I made a few moments to do a simple compare of a recent generated-by-us BitBitPlugin.c and the Ben-version; three changes that will need a little tweaking of the Slang.
See in the Ben-code (per https://raw.githubusercontent.com/bavison/opensmalltalk-vm/Ben/src/plugins/B...), lines - 1855 1866-73 5238 for possible return value change? 6395-6401
tim -- tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim Strange OpCodes: FSE: Fake Serious Error
Blimey, what a nice surprise! Thanks! -Tobias
On 30. Apr 2021, at 06:38, tim Rowledge tim@rowledge.org wrote:
Our friends in Cambridge (Real Cambridge, not Backup Cambridge) have spent a nice chunk of money to bring the ARM32 bitblt speedups they provided in '14/5/6 into the ARMv8 world. Quite a few microbenchmarks covering the tests Ben did (and he wrote a testing framework that ran some 10s of thousands of tests) are improved by an order of magnitude, some by 30X and one by 57X !
All the code to date is pushed to https://github.com/bavison/opensmalltalk-vm/tree/Ben with the latest version of the test harnesses at https://github.com/bavison/SqueakBitBltTest
Look for items changed in the last few days ie 25th april or later. I haven't had a chance to do more than glance as yet. I *suspect* Ben has manually edited the generated BitBltPlugin.c file, which will mean doing some diffing and back-porting into Slang. Maybe.
I, for one, welcome our new v8 blit overlords.
tim tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim "#define QUESTION ((bb) || !(bb)) - Shakespeare."
vm-dev@lists.squeakfoundation.org
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Marcel Taeumel -
tim Rowledge -
Tobias Pape