Jan Gray
@jangray.bsky.social
Kilocore RISC-V FPGA accelerators; former Microsoft dev tools architect; Vice-chair RISC-V SoftCPU SIG & Composable Custom Extensions Task Group; blog: https://fpga.org. Cyclist. Let's try kindness. 🇨🇦-🇺🇸
Pinned
Jan Gray
@jangray.bsky.social
· Nov 12
2GRVI Phalanx at Hot Chips 31 (2019): The First Kilocore RISC-V RV64I with High Bandwidth Memory
This week at Hot Chips 31 (2019) I am presenting a status update poster on the work-in-progress GRVI Phalanx Accelerator Kit: 2GRVI Phalanx: Towards Kilocore RISC-V FPGA Accelerators with HBM2 DRAM…
fpga.org
#FPGA #RISCV
2GRVI Phalanx at Hot Chips 31: The First Kilocore RISC-V RV64I with HBM2 High Bandwidth Memory
fpga.org/2019/08/19/2...
2GRVI Phalanx at Hot Chips 31: The First Kilocore RISC-V RV64I with HBM2 High Bandwidth Memory
fpga.org/2019/08/19/2...
Composable custom extensions work in progress:
We’ve started drafting another spec section for a new uniform (extension-agnostic) extension state context management extension.
github.com/riscv/compos...
lists.riscv.org/g/tech-compo...
Interested? Join us. Join RVI and this CX TG.
We’ve started drafting another spec section for a new uniform (extension-agnostic) extension state context management extension.
github.com/riscv/compos...
lists.riscv.org/g/tech-compo...
Interested? Join us. Join RVI and this CX TG.
composable-custom-extensions/src/isa-state.adoc at main · riscv/composable-custom-extensions
This task group will propose ISA extension(s) and non-ISA hardware and software interop interfaces to enable routine reuse and composition of a subcategory of custom extensions called composable ex...
github.com
December 6, 2025 at 6:08 PM
Composable custom extensions work in progress:
We’ve started drafting another spec section for a new uniform (extension-agnostic) extension state context management extension.
github.com/riscv/compos...
lists.riscv.org/g/tech-compo...
Interested? Join us. Join RVI and this CX TG.
We’ve started drafting another spec section for a new uniform (extension-agnostic) extension state context management extension.
github.com/riscv/compos...
lists.riscv.org/g/tech-compo...
Interested? Join us. Join RVI and this CX TG.
Reposted by Jan Gray
Cinema will find a way. 💕
December 6, 2025 at 3:42 PM
Cinema will find a way. 💕
Reposted by Jan Gray
Admiral Rachel Levine was the first transgender person to be confirmed by the Senate to serve in the federal government. Her official portrait at HHS headquarters has been altered. n.pr/48HypvT
HHS changed the name of transgender health leader on her official portrait
Admiral Rachel Levine was the first transgender person to be confirmed by the Senate to serve in the federal government. Her official portrait at HHS headquarters has been altered.
n.pr
December 5, 2025 at 10:50 PM
Admiral Rachel Levine was the first transgender person to be confirmed by the Senate to serve in the federal government. Her official portrait at HHS headquarters has been altered. n.pr/48HypvT
Reposted by Jan Gray
Very proud to say at last that Metroid Prime 4 is here!
It was an honor to work with such a passionate and hard working team on a project so many have been looking forward to for such a long time. It really challenged me to learn and grow as an artist, and I'm forever grateful to be a part of it. 💜
It was an honor to work with such a passionate and hard working team on a project so many have been looking forward to for such a long time. It really challenged me to learn and grow as an artist, and I'm forever grateful to be a part of it. 💜
December 5, 2025 at 2:13 AM
Very proud to say at last that Metroid Prime 4 is here!
It was an honor to work with such a passionate and hard working team on a project so many have been looking forward to for such a long time. It really challenged me to learn and grow as an artist, and I'm forever grateful to be a part of it. 💜
It was an honor to work with such a passionate and hard working team on a project so many have been looking forward to for such a long time. It really challenged me to learn and grow as an artist, and I'm forever grateful to be a part of it. 💜
December 3, 2025 at 5:51 AM
Worth it
Our Most Treacherous Adversary - James McNellis - Meeting C++ 2025 lightning talks
www.youtube.com/watch?v=zC_u...
#cpp
#cplusplus
www.youtube.com/watch?v=zC_u...
#cpp
#cplusplus
Our Most Treacherous Adversary - James McNellis - Meeting C++ 2025 lightning talks
YouTube video by Meeting Cpp
www.youtube.com
December 2, 2025 at 7:13 PM
Worth it
Highly recommended for those with “build my ASIC before I die” on their bucket list.
My Zero to ASIC courses are the most recognized, highest-rated programs, and still the only ones that guarantee a tapeout!
Start your journey toward holding a custom ASIC in the palm of your hand and save $150 with code Z2ABLACK25.
ZeroToASICcourse.com
Start your journey toward holding a custom ASIC in the palm of your hand and save $150 with code Z2ABLACK25.
ZeroToASICcourse.com
November 29, 2025 at 4:45 PM
Highly recommended for those with “build my ASIC before I die” on their bucket list.
Reposted by Jan Gray
Reposted by Jan Gray
November 29, 2025 at 1:20 PM
Reposted by Jan Gray
=>
"Numerics and AI", Paulius Micikevicius, GPU Mode, Nov 15, 2025 www.youtube.com/watch?v=ua2N...
github.com/gpu-mode/lec...
Stochastic Rounding, Minisymp on Probabilistic Rounding, Sep 1 bsky.app/profile/ogaw...
Survey, Proc of the IEEE, Jun 26 bsky.app/profile/ogaw...
36 pp, 201 ref
MX+, MICRO25
"Numerics and AI", Paulius Micikevicius, GPU Mode, Nov 15, 2025 www.youtube.com/watch?v=ua2N...
github.com/gpu-mode/lec...
Stochastic Rounding, Minisymp on Probabilistic Rounding, Sep 1 bsky.app/profile/ogaw...
Survey, Proc of the IEEE, Jun 26 bsky.app/profile/ogaw...
36 pp, 201 ref
MX+, MICRO25
November 25, 2025 at 3:33 AM
=>
"Numerics and AI", Paulius Micikevicius, GPU Mode, Nov 15, 2025 www.youtube.com/watch?v=ua2N...
github.com/gpu-mode/lec...
Stochastic Rounding, Minisymp on Probabilistic Rounding, Sep 1 bsky.app/profile/ogaw...
Survey, Proc of the IEEE, Jun 26 bsky.app/profile/ogaw...
36 pp, 201 ref
MX+, MICRO25
"Numerics and AI", Paulius Micikevicius, GPU Mode, Nov 15, 2025 www.youtube.com/watch?v=ua2N...
github.com/gpu-mode/lec...
Stochastic Rounding, Minisymp on Probabilistic Rounding, Sep 1 bsky.app/profile/ogaw...
Survey, Proc of the IEEE, Jun 26 bsky.app/profile/ogaw...
36 pp, 201 ref
MX+, MICRO25
If Ford gov’t doesn’t reopen @onsciencecentre.bsky.social pronto, it will never reopen.
2028, laying off the rest of the Science Centre staff, “I’m as disappointed as anyone,” fibbed the Minister of Infrastructure, reflecting on her 2024 decision to shutter an institution beloved of generations.
2028, laying off the rest of the Science Centre staff, “I’m as disappointed as anyone,” fibbed the Minister of Infrastructure, reflecting on her 2024 decision to shutter an institution beloved of generations.
November 24, 2025 at 5:08 PM
If Ford gov’t doesn’t reopen @onsciencecentre.bsky.social pronto, it will never reopen.
2028, laying off the rest of the Science Centre staff, “I’m as disappointed as anyone,” fibbed the Minister of Infrastructure, reflecting on her 2024 decision to shutter an institution beloved of generations.
2028, laying off the rest of the Science Centre staff, “I’m as disappointed as anyone,” fibbed the Minister of Infrastructure, reflecting on her 2024 decision to shutter an institution beloved of generations.
Is NVLink Fusion a response to Ultra Accelerator Link? Would it have happened sans UAL? 🤪
November 20, 2025 at 4:47 AM
Is NVLink Fusion a response to Ultra Accelerator Link? Would it have happened sans UAL? 🤪
Reposted by Jan Gray
Microsoft Cobalt 200
- TSMC 3 nm
- two chiplets with custom HB interconnect
- 132 cores (Armv9.2), 66 per chiplet
- 3 MB private L2$
- 192 MB L3$
- 12 memory channels
- per core DVFS
www.hardwareluxx.de/index.php/ne...
- TSMC 3 nm
- two chiplets with custom HB interconnect
- 132 cores (Armv9.2), 66 per chiplet
- 3 MB private L2$
- 192 MB L3$
- 12 memory channels
- per core DVFS
www.hardwareluxx.de/index.php/ne...
November 19, 2025 at 8:29 AM
Microsoft Cobalt 200
- TSMC 3 nm
- two chiplets with custom HB interconnect
- 132 cores (Armv9.2), 66 per chiplet
- 3 MB private L2$
- 192 MB L3$
- 12 memory channels
- per core DVFS
www.hardwareluxx.de/index.php/ne...
- TSMC 3 nm
- two chiplets with custom HB interconnect
- 132 cores (Armv9.2), 66 per chiplet
- 3 MB private L2$
- 192 MB L3$
- 12 memory channels
- per core DVFS
www.hardwareluxx.de/index.php/ne...
Hooray for bitblt, a.k.a. rasterop in some backward provinces.
You younguns don’t get it — but if all you knew was 24x80 character displays (*) or worse, bitblt was a long tall drink of water.
Color is fine but 80% of the advance came with the bilevel display.
(*) vector displays notwithstanding
You younguns don’t get it — but if all you knew was 24x80 character displays (*) or worse, bitblt was a long tall drink of water.
Color is fine but 80% of the advance came with the bilevel display.
(*) vector displays notwithstanding
I declare that today, Nov. 19, 2025 is the 50th anniversary of BitBLT, a routine so fundamental to computer graphics that we don't even think about it having an origin. Dan Ingalls came up with a working implementation on the Xerox Alto as part of his work on Smalltalk.
November 19, 2025 at 8:26 AM
Hooray for bitblt, a.k.a. rasterop in some backward provinces.
You younguns don’t get it — but if all you knew was 24x80 character displays (*) or worse, bitblt was a long tall drink of water.
Color is fine but 80% of the advance came with the bilevel display.
(*) vector displays notwithstanding
You younguns don’t get it — but if all you knew was 24x80 character displays (*) or worse, bitblt was a long tall drink of water.
Color is fine but 80% of the advance came with the bilevel display.
(*) vector displays notwithstanding
One thing there is not much of at Supercomputing’25 is FPGAs for HPC accelerators. As far as I have seen so far there is an Achronix booth. There is one Alveo V80 (Versal HBM) card in the AMD booth, unadorned with any demos or collateral. No Altera.
November 19, 2025 at 4:18 AM
One thing there is not much of at Supercomputing’25 is FPGAs for HPC accelerators. As far as I have seen so far there is an Achronix booth. There is one Alveo V80 (Versal HBM) card in the AMD booth, unadorned with any demos or collateral. No Altera.
Reposted by Jan Gray
HPCwire Reveals Winners of the 22nd Annual Readers’ and Editors’ Choice Awards During SC25
#HPCwire #SC25
Link: ow.ly/fC4L50XtflZ
#HPCwire #SC25
Link: ow.ly/fC4L50XtflZ
HPCwire Reveals Winners of the 22nd Annual Readers’ and Editors’ Choice Awards During SC25 - HPCwire
ST. LOUIS, Nov. 17, 2025 — HPCwire, the leading publication for news and information for the high performance computing industry, announced the winners of the 2025 HPCwire Readers’ and Editors’ Choice...
ow.ly
November 18, 2025 at 12:18 AM
HPCwire Reveals Winners of the 22nd Annual Readers’ and Editors’ Choice Awards During SC25
#HPCwire #SC25
Link: ow.ly/fC4L50XtflZ
#HPCwire #SC25
Link: ow.ly/fC4L50XtflZ
November 18, 2025 at 4:42 AM
Reposted by Jan Gray
A wide range of talks so far this morning at the @riscv.org.web.brid.gy #SC25 workshop. Driving analogue systems from #RISCV, coupling with spiking neural networks, and profiling tooling all demonstrates the flexibility the technology gives us to do cool things
November 17, 2025 at 4:36 PM
A wide range of talks so far this morning at the @riscv.org.web.brid.gy #SC25 workshop. Driving analogue systems from #RISCV, coupling with spiking neural networks, and profiling tooling all demonstrates the flexibility the technology gives us to do cool things
November 16, 2025 at 8:08 PM
Reposted by Jan Gray
5400W (!) per GB200 NVL4 board exemplifies the hot Winter of Moore's Law.
The next five years' next 10X @ constant power must somehow shave 90% of today's energy: new algorithms & abstractions, codesign, integration, specialization, accelerators, processing near & in-memory, and new interconnects.
The next five years' next 10X @ constant power must somehow shave 90% of today's energy: new algorithms & abstractions, codesign, integration, specialization, accelerators, processing near & in-memory, and new interconnects.
November 20, 2024 at 2:48 PM
5400W (!) per GB200 NVL4 board exemplifies the hot Winter of Moore's Law.
The next five years' next 10X @ constant power must somehow shave 90% of today's energy: new algorithms & abstractions, codesign, integration, specialization, accelerators, processing near & in-memory, and new interconnects.
The next five years' next 10X @ constant power must somehow shave 90% of today's energy: new algorithms & abstractions, codesign, integration, specialization, accelerators, processing near & in-memory, and new interconnects.
Reposted by Jan Gray
i got suspended for yielding from my coroutine
November 15, 2025 at 6:53 PM
i got suspended for yielding from my coroutine
“Popular demand”
Popular demand is restoring and reopening the real thing, following its abrupt shabby and sordid shuttering and gutting.
Ford, Surma, and (apparently) the Board are manifestly deaf to popular demand.
~100,000 letters to MPPs to @saveosc.bsky.social were ignored.
Popular demand.
Popular demand is restoring and reopening the real thing, following its abrupt shabby and sordid shuttering and gutting.
Ford, Surma, and (apparently) the Board are manifestly deaf to popular demand.
~100,000 letters to MPPs to @saveosc.bsky.social were ignored.
Popular demand.
Back by popular demand, Emett’s Dream Machines have arrived for the holiday season at our CF Sherway Gardens Experience! 🤩 Bring the whole family and experience the one-of-a-kind creations today ☕️🛤️
📍CF Sherway Gardens
📍CF Sherway Gardens
November 14, 2025 at 9:12 PM
“Popular demand”
Popular demand is restoring and reopening the real thing, following its abrupt shabby and sordid shuttering and gutting.
Ford, Surma, and (apparently) the Board are manifestly deaf to popular demand.
~100,000 letters to MPPs to @saveosc.bsky.social were ignored.
Popular demand.
Popular demand is restoring and reopening the real thing, following its abrupt shabby and sordid shuttering and gutting.
Ford, Surma, and (apparently) the Board are manifestly deaf to popular demand.
~100,000 letters to MPPs to @saveosc.bsky.social were ignored.
Popular demand.
ISA extensions evolve. What’s a good programming model for coping with that, providing composition and longevity of old and new code on old and new processors?
github.com/riscv/compos...
github.com/riscv/compos...
November 14, 2025 at 3:08 AM
ISA extensions evolve. What’s a good programming model for coping with that, providing composition and longevity of old and new code on old and new processors?
github.com/riscv/compos...
github.com/riscv/compos...
Took styrofoam to the recycler. There, waiting for me, forsaken, was a 1979 2 volume Compact Ed. of the OED, "Reproduced Micrographically", with magnifying glass.
50 years ago these were an awesome, revered artifact on the teacher's desk.
I had to bring it home, at least to find it a better end.
50 years ago these were an awesome, revered artifact on the teacher's desk.
I had to bring it home, at least to find it a better end.
November 13, 2025 at 10:47 PM
Took styrofoam to the recycler. There, waiting for me, forsaken, was a 1979 2 volume Compact Ed. of the OED, "Reproduced Micrographically", with magnifying glass.
50 years ago these were an awesome, revered artifact on the teacher's desk.
I had to bring it home, at least to find it a better end.
50 years ago these were an awesome, revered artifact on the teacher's desk.
I had to bring it home, at least to find it a better end.