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...
Reposted by Jan Gray
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Challenges and Research Directions for Large Language Model Inference Hardware, X. Ma, David Patterson, Google, arXiv, Jan 8, 2026 arxiv.org/abs/2601.05047
4 Research Opportunities to Re-Think
HBF bsky.app/profile/ogaw...
NMC
3D Stacking
Low-Latency Interconnect
Comp Arch bsky.app/profile/ogaw...
Challenges and Research Directions for Large Language Model Inference Hardware, X. Ma, David Patterson, Google, arXiv, Jan 8, 2026 arxiv.org/abs/2601.05047
4 Research Opportunities to Re-Think
HBF bsky.app/profile/ogaw...
NMC
3D Stacking
Low-Latency Interconnect
Comp Arch bsky.app/profile/ogaw...
January 9, 2026 at 4:05 AM
=>
Challenges and Research Directions for Large Language Model Inference Hardware, X. Ma, David Patterson, Google, arXiv, Jan 8, 2026 arxiv.org/abs/2601.05047
4 Research Opportunities to Re-Think
HBF bsky.app/profile/ogaw...
NMC
3D Stacking
Low-Latency Interconnect
Comp Arch bsky.app/profile/ogaw...
Challenges and Research Directions for Large Language Model Inference Hardware, X. Ma, David Patterson, Google, arXiv, Jan 8, 2026 arxiv.org/abs/2601.05047
4 Research Opportunities to Re-Think
HBF bsky.app/profile/ogaw...
NMC
3D Stacking
Low-Latency Interconnect
Comp Arch bsky.app/profile/ogaw...
An excellent and (alas) timeless presentation of the whole performance engineering landscape and many many pitfalls, from my friend @ricomariani.bsky.social :-
Software Performance Engineering: The Ideas I Keep Coming Back To ricomariani.medium.com/software-per...
Software Performance Engineering: The Ideas I Keep Coming Back To ricomariani.medium.com/software-per...
Software Performance Engineering: The Ideas I Keep Coming Back To
Over the years, I’ve written about software performance from a lot of different angles: C++, .NET, systems internals, abstractions, memory…
ricomariani.medium.com
January 7, 2026 at 2:01 AM
An excellent and (alas) timeless presentation of the whole performance engineering landscape and many many pitfalls, from my friend @ricomariani.bsky.social :-
Software Performance Engineering: The Ideas I Keep Coming Back To ricomariani.medium.com/software-per...
Software Performance Engineering: The Ideas I Keep Coming Back To ricomariani.medium.com/software-per...
Oh no! Flynn had a huge impact on our field of computer architecture, in systems and research.
“In recognition, with tremendous gratitude, of your lifetime dedication and leadership to the computer architecture community on this the 50th anniversary of your founding of ISCA, SIGARCH, and TCCA.”
“In recognition, with tremendous gratitude, of your lifetime dedication and leadership to the computer architecture community on this the 50th anniversary of your founding of ISCA, SIGARCH, and TCCA.”
R.I.P. Mike Flynn, processor architect and professor.
One of the designers of the awesome IBM 360 model 91.
One of the designers of the awesome IBM 360 model 91.
In Memoriam: Remembering Mike Flynn
Michael J. Flynn is a widely respected contributor—indeed a giant—in the field of Computer Architecture. He made highly significant and impactful contributions throughout his career, both in indus…
www.sigarch.org
January 6, 2026 at 11:52 PM
Oh no! Flynn had a huge impact on our field of computer architecture, in systems and research.
“In recognition, with tremendous gratitude, of your lifetime dedication and leadership to the computer architecture community on this the 50th anniversary of your founding of ISCA, SIGARCH, and TCCA.”
“In recognition, with tremendous gratitude, of your lifetime dedication and leadership to the computer architecture community on this the 50th anniversary of your founding of ISCA, SIGARCH, and TCCA.”
Reposted by Jan Gray
Science culture matters, but what is it? How can we reimagine and renew the relationship between science and society in the current malaise?
My colleagues at Actua asked me to write a paper to spur discussion. I wrote three. 🤷🏻♂️
1. Reimagining Science Culture in Canada.
actua.ca/wp-content/u...
My colleagues at Actua asked me to write a paper to spur discussion. I wrote three. 🤷🏻♂️
1. Reimagining Science Culture in Canada.
actua.ca/wp-content/u...
January 6, 2026 at 1:10 PM
Science culture matters, but what is it? How can we reimagine and renew the relationship between science and society in the current malaise?
My colleagues at Actua asked me to write a paper to spur discussion. I wrote three. 🤷🏻♂️
1. Reimagining Science Culture in Canada.
actua.ca/wp-content/u...
My colleagues at Actua asked me to write a paper to spur discussion. I wrote three. 🤷🏻♂️
1. Reimagining Science Culture in Canada.
actua.ca/wp-content/u...
Reposted by Jan Gray
If you are a senior researcher (i.e., associate prof level or later), and you're interested in moving to the University of Waterloo (best CS program in Canada) for the Canada Impact+ Research Chair (biggest chair position in Canada, $$$$$), email me. Discretion guaranteed.
January 6, 2026 at 3:26 PM
If you are a senior researcher (i.e., associate prof level or later), and you're interested in moving to the University of Waterloo (best CS program in Canada) for the Canada Impact+ Research Chair (biggest chair position in Canada, $$$$$), email me. Discretion guaranteed.
Reposted by Jan Gray
Four generations of my family have served our country. Service is in my blood. The President wouldn’t know anything about that.
January 5, 2026 at 6:24 PM
Four generations of my family have served our country. Service is in my blood. The President wouldn’t know anything about that.
My Indispensable bike touring tools: PB Swiss short allen keys, Topeak Ratchet Rocket Lite NTX, Leatherman Wave, Silca Ti lock ring tool, Topeak Power Levers
January 1, 2026 at 8:39 PM
My Indispensable bike touring tools: PB Swiss short allen keys, Topeak Ratchet Rocket Lite NTX, Leatherman Wave, Silca Ti lock ring tool, Topeak Power Levers
Reposted by Jan Gray
🧵 Starting the year with an urban adventure! @hannafloss.bsky.social and I will be riding the full length of the @sound-transit.bsky.social light rail lines 1 & 2, starting at the BelRed station. Looking forward to seeing the new stations, as well as many others we’ve never been to!
January 1, 2026 at 5:54 PM
🧵 Starting the year with an urban adventure! @hannafloss.bsky.social and I will be riding the full length of the @sound-transit.bsky.social light rail lines 1 & 2, starting at the BelRed station. Looking forward to seeing the new stations, as well as many others we’ve never been to!
Reposted by Jan Gray
Woody Guthrie’s “New Years Rulin’s” from 1943:
January 1, 2026 at 5:34 PM
Woody Guthrie’s “New Years Rulin’s” from 1943:
Reposted by Jan Gray
Canadian house party in winter 🥳
January 1, 2026 at 3:22 AM
Canadian house party in winter 🥳
THANK YOU, DUFFER BROS. ❤️
January 1, 2026 at 8:52 AM
THANK YOU, DUFFER BROS. ❤️
Good riddance to 2025. Fuck those sociopath bastards killing USAID, dooming millions of the poorest.
Presently I’m repacking my bike into this same case as in the post below. Wrenching feels good.
Keep turning the cranks and keep looking up. Be well.
Presently I’m repacking my bike into this same case as in the post below. Wrenching feels good.
Keep turning the cranks and keep looking up. Be well.
January 1, 2026 at 6:01 AM
Good riddance to 2025. Fuck those sociopath bastards killing USAID, dooming millions of the poorest.
Presently I’m repacking my bike into this same case as in the post below. Wrenching feels good.
Keep turning the cranks and keep looking up. Be well.
Presently I’m repacking my bike into this same case as in the post below. Wrenching feels good.
Keep turning the cranks and keep looking up. Be well.
Cheifet’s Computer Chronicles was a wonderful weekly show that chronicled the glorious early days of personal computing.
For many years we’d gather to watch and play along to the yearly Computer Bowl and rival or outscore the big shots on trivia.
youtu.be/f3ugQKKbUQY
Thank you, Stewart Cheifet.
For many years we’d gather to watch and play along to the yearly Computer Bowl and rival or outscore the big shots on trivia.
youtu.be/f3ugQKKbUQY
Thank you, Stewart Cheifet.
December 31, 2025 at 5:31 PM
Cheifet’s Computer Chronicles was a wonderful weekly show that chronicled the glorious early days of personal computing.
For many years we’d gather to watch and play along to the yearly Computer Bowl and rival or outscore the big shots on trivia.
youtu.be/f3ugQKKbUQY
Thank you, Stewart Cheifet.
For many years we’d gather to watch and play along to the yearly Computer Bowl and rival or outscore the big shots on trivia.
youtu.be/f3ugQKKbUQY
Thank you, Stewart Cheifet.
Reposted by Jan Gray
Hot Chips 2025 is up as well (I'm a few weeks late this year): www.youtube.com/playlist?lis...
Hot Chips 2025 - YouTube
Videos from Hot Chips 2025
www.youtube.com
December 30, 2025 at 12:58 PM
Hot Chips 2025 is up as well (I'm a few weeks late this year): www.youtube.com/playlist?lis...
How can we train the next generation of computer scientists how to think when programming, when we tolerate and thus incentivize not thinking?
My statement on teaching (looking for permanent teaching-centric gigs)
docs.google.com/document/d/1...
It really really is bad in the CS side, and I've dealt with too many faculty who are all gaga over it...
docs.google.com/document/d/1...
It really really is bad in the CS side, and I've dealt with too many faculty who are all gaga over it...
Statement on Teaching:
Statement on Teaching: Effective Programming in the Age of “AI” Nicholas Weaver nweaver@icsi.berkeley.edu https://skerry-tech.com/cv.html Computer science is not computer programming but computer p...
docs.google.com
December 29, 2025 at 3:12 PM
How can we train the next generation of computer scientists how to think when programming, when we tolerate and thus incentivize not thinking?
Reposted by Jan Gray
“By reading this plaque, you have made a valuable addition to the number of people who have read this plaque” … an important heritage moment on the streets of Toronto (by artist Sarah Lazarovic).
December 27, 2025 at 1:01 PM
“By reading this plaque, you have made a valuable addition to the number of people who have read this plaque” … an important heritage moment on the streets of Toronto (by artist Sarah Lazarovic).
TCM Remembers 2025 | TCM
YouTube video by Turner Classic Movies
www.youtube.com
December 26, 2025 at 2:57 AM
#TCMParty 😮😮😮
FYI during filming there was a Blimp (Roger Livesey as Major General Clive Wynne-Candy) joke cameo in heaven 👇
FYI during filming there was a Blimp (Roger Livesey as Major General Clive Wynne-Candy) joke cameo in heaven 👇
Wow: on FB's "Michael Powell and Emeric Pressburger, The Archers" Group, "Anonymous participant" shares clips of a 1945 newsreel & writes: "Blimp/Candy, wearing a towel, is seen striding down the ringside aisle to the amusement of the British military personnel in the [AMOLAD] audience." #tcmparty
December 26, 2025 at 1:40 AM
#TCMParty 😮😮😮
FYI during filming there was a Blimp (Roger Livesey as Major General Clive Wynne-Candy) joke cameo in heaven 👇
FYI during filming there was a Blimp (Roger Livesey as Major General Clive Wynne-Candy) joke cameo in heaven 👇
Reposted by Jan Gray
This is an almost shockingly wise essay. I'm glad I've finally read it.
There Is No Mary Problem in ‘It’s a Wonderful Life’
George’s vision of his wife without him is essential to the film, but critics continue to miss its true—and profound—meaning.
open.substack.com
December 24, 2025 at 12:34 AM
This is an almost shockingly wise essay. I'm glad I've finally read it.
Reposted by Jan Gray
IMAGINE providing all of your new nonesuch high stakes focus-craving software developers with their own OFFICE with a DOOR that closes so they can THINK and GET STUFF DONE.
An OFFICE large enough for whiteboards, bookcases, and a COUCH so they can HANG OUT or even LIE DOWN AND THINK!
An OFFICE large enough for whiteboards, bookcases, and a COUCH so they can HANG OUT or even LIE DOWN AND THINK!
July 20, 2025 at 7:16 AM
IMAGINE providing all of your new nonesuch high stakes focus-craving software developers with their own OFFICE with a DOOR that closes so they can THINK and GET STUFF DONE.
An OFFICE large enough for whiteboards, bookcases, and a COUCH so they can HANG OUT or even LIE DOWN AND THINK!
An OFFICE large enough for whiteboards, bookcases, and a COUCH so they can HANG OUT or even LIE DOWN AND THINK!
Reposted by Jan Gray
#FPGA Amazon AWS F1 machine instances, with XCVU9P FPGAs, are retired as of today, Dec. 20, 2025.
Instead use F2 instances with XCVU47P UltraScale+ HBM FPGAs (which I urged Amazon to support in 2019).
aws.amazon.com/ec2/instance...
One FPGA F2 is ~$2/hour, ~$0.62 spot. f2.48XL with 8, is 8x that.
Instead use F2 instances with XCVU47P UltraScale+ HBM FPGAs (which I urged Amazon to support in 2019).
aws.amazon.com/ec2/instance...
One FPGA F2 is ~$2/hour, ~$0.62 spot. f2.48XL with 8, is 8x that.
December 20, 2025 at 5:02 PM
#FPGA Amazon AWS F1 machine instances, with XCVU9P FPGAs, are retired as of today, Dec. 20, 2025.
Instead use F2 instances with XCVU47P UltraScale+ HBM FPGAs (which I urged Amazon to support in 2019).
aws.amazon.com/ec2/instance...
One FPGA F2 is ~$2/hour, ~$0.62 spot. f2.48XL with 8, is 8x that.
Instead use F2 instances with XCVU47P UltraScale+ HBM FPGAs (which I urged Amazon to support in 2019).
aws.amazon.com/ec2/instance...
One FPGA F2 is ~$2/hour, ~$0.62 spot. f2.48XL with 8, is 8x that.