Jarkko Sakkinen
Posts
4675Following
319Followers
484OpenPGP: 3AB05486C7752FE1
Jarkko Sakkinen
jarkko
@timojyrinki I own one of these https://www.turris.com/en/products/omnia/.
1
0
2
I like in RISC-V that it is pretty fast to build kernel alike environments for S-mode because it has the cleanest state transformations I've seen so far in any CPU, It is a "unikernel first" CPU architecture. And different subsets of the specification scale from CPU cores to application cores, such as GPU cores as demonstrated recently: https://www.tomshardware.com/pc-components/cpus/imagination-and-ventana-to-build-a-risc-v-cpu-gpu-platform
2
1
2
Jarkko Sakkinen
jarkko
Edited 1 year ago
Some learnings of RISC-V, at least from CVA6 perspective:
- If there is any SATP or PTE sync issue, sprinkle first
sfence.vmatogether withfence.i. It is not optimal but usually ensures stability. Once things are functionally together sync points can be reduced. - Might be CVA6 specific issue but I’ve sometimes had issues with
WPTE’s created without having alsoD, causing odd crashes. So again, I’ve taken the habit of first binding these together and later on reduce.
I’ve yet use ASIC boards, have only used FPGA so far and development versions of CPU’s. I guess these sort of fail-safe practices are more important in early development
1
0
0
@mjg59 I've had friends with kids at least at LPC so I see that as a plus tbh.
0
0
2
@AndreasBackx comedy writing itself is not a new thing open source have to admit :---) E.g. Ulrich Drepper and EGLIBC drama is one of the classics in this area (not to insult the person, I still have cpumemory.pdf always at hand, exceptionally smart guy).
0
0
0
Jarkko Sakkinen
jarkko
@hiljaisuus @lari Ja sitten se on mielenkiintoista kanssa, että miksi ihmisille joiden käsissä meidän elämä on tavalla tai toisella kuten poliisille, sairaanhoitajille yms. maksetaan aivan helvetin huonosti. Ne on kuitenkin eksistentiaalisen kriittisiä duuneja...
0
0
2
@AndreasBackx Don't get me wrong. I appreciate your comments. interesting topic.
For sudo, I think it would make sense to me in the case, if the upstream project would start to rewrite itself in Rust similarly as kernel is rewriting itself in Rust. Security is more a process than a tool.
For sudo, I think it would make sense to me in the case, if the upstream project would start to rewrite itself in Rust similarly as kernel is rewriting itself in Rust. Security is more a process than a tool.
0
0
1
Jarkko Sakkinen
jarkko
@AndreasBackx This sort of makes me think if I should just switch back to GNU ls...
Considering sudo-like command the more important factor is committed and experienced maintainers than implementation language tbh.
I mean this is just stupid: https://github.com/ogham/exa/issues/1243
With bat I think I live on the edge... Syntax highlighted source code dump is useful enough.
Considering sudo-like command the more important factor is committed and experienced maintainers than implementation language tbh.
I mean this is just stupid: https://github.com/ogham/exa/issues/1243
With bat I think I live on the edge... Syntax highlighted source code dump is useful enough.
2
0
0
Jarkko Sakkinen
jarkko
@AndreasBackx True, there's exceptions to the rule. I use exa and bat [1] :-) How do exa and eza differ anyway?
[1] https://github.com/jarkkojs/home/blob/main/.bashrc
[1] https://github.com/jarkkojs/home/blob/main/.bashrc
1
0
0
I mean factors larger binaries with non-standard output, and you really have limited use for the added fanciness. They are only great at breaking backwards compatibility, if you put them into scripts.
This does not mean that Rust in command-line sucks in general. I think tools such as Starship and Typst are just great. They invent.
This does not mean that Rust in command-line sucks in general. I think tools such as Starship and Typst are just great. They invent.
0
0
2
@lari @hiljaisuus Mä oon tienannut open sourcella sen verran, että se on riittänyt monta vuotta putkeen verokoneisiin, ja maksanut paljon veroja myös.
Se ei vituta, koska teen asioita mitä tekisin vaikka sossun asiakkaana, mutta mun mielestä siinä on joku epäsuhta, että Internetin infrastruktuurin kehittämisestä verotetaan rankemmin kuin vaikkapa some-influensseria, joka kiertää verot holding-yhtiön kautta.
Verotuksessa tuntuu epäreilulta, ei mikään tietty prosentti, vaan että aktiivisuus on kaikista raskaimmin verotettua, ja passiivisuus vähiten (esim. pääoman verottaminen). Ne voisi olla edes samalla viivalla.
Se ei vituta, koska teen asioita mitä tekisin vaikka sossun asiakkaana, mutta mun mielestä siinä on joku epäsuhta, että Internetin infrastruktuurin kehittämisestä verotetaan rankemmin kuin vaikkapa some-influensseria, joka kiertää verot holding-yhtiön kautta.
Verotuksessa tuntuu epäreilulta, ei mikään tietty prosentti, vaan että aktiivisuus on kaikista raskaimmin verotettua, ja passiivisuus vähiten (esim. pääoman verottaminen). Ne voisi olla edes samalla viivalla.
1
0
12
75% time went to exclusion, i.e. finding that the bug is in the enclave itself, not in kernel, SDK or the security monitor. Last two weeks was peeking and poking with loader.S. I even wrote a new driver for Keystone in the process so that I could exclude the driver (OTT driver is, well, I don’t want to say anything impolite…).
1
0
1
Jarkko Sakkinen
jarkko
Edited 1 year ago
I nailed the Keystone SATP change bug on CVA6 after only 1.5 months of constant debugging:
1
0
1
Jarkko Sakkinen
jarkko
"Sometimes smart thinkers just don’t know when to stop, and they create these absurd, all-encompassing, high-level pictures of the universe that are all good and fine, but don’t actually mean anything at all."
Is this a description of Haskell or NixOS? I'm sorry, a bad joke. Please don't get upset.
https://www.joelonsoftware.com/2001/04/21/dont-let-architecture-astronauts-scare-you/
Is this a description of Haskell or NixOS? I'm sorry, a bad joke. Please don't get upset.
https://www.joelonsoftware.com/2001/04/21/dont-let-architecture-astronauts-scare-you/
0
0
1