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Mark Papadakis proslijedio/la je Tweet
It was a lot of fun speaking with folks at FOSDEM today about sled and io_uring! Here are the slides from my talk today: https://docs.google.com/presentation/d/1rKd7NYJhLovDhE7qVFCWeJda7LWIFeaZfSCaftPU9NE/edit?usp=sharing …https://twitter.com/sadisticsystems/status/1220703281242165251 …
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Mark Papadakis proslijedio/la je Tweet
It's not every day that a read-after-write makes a server spend 4% of its CPU cycles in one instruction. Wrote that one up here: https://pvk.ca/Blog/2020/02/01/too-much-locality-for-store-forwarding/ …
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Mark Papadakis proslijedio/la je Tweet
Once this gets wired up, I think the motivation is there to finally make page gifting work fully. With that, you can alloc data in your app, gift that data to the kernel, and write it to a file. All without having to copy the data, even once.
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Mark Papadakis proslijedio/la je Tweet
A Universal I/O Abstraction for C++ New blog post about executors, asynchronous I/O, io_uring, coroutines and more !
https://cor3ntin.github.io/posts/iouring/
pic.twitter.com/orSvys0cdo
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( also accountability and reflection is important and largely not happening, nor just in tools choices(re:your comments on GC langs/runtimes), but with pretty much everything today )
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Mark Papadakis proslijedio/la je Tweet
For those who missed it, I played with
@GCPcloud last night, expecting to snark all over it. Instead the experience was damned close to perfect, and now my opinion of@GCPcloud has shifted as a result.https://twitter.com/QuinnyPig/status/1222734098289979393 …Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Mark Papadakis proslijedio/la je Tweet
For those who need a new Jean-Luc Picard facepalm gif — here you go!
#StarTrekPicardpic.twitter.com/mzYGTUmy8BPrikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Mark Papadakis proslijedio/la je Tweet
Here's an example of writing a generic async algorithm using sender/receiver from the latest Executors proposal (P0443R12) + the changes suggested in P2006. https://godbolt.org/z/Enh6qa This algo retries an async operation until it succeeds or is cancelled. It was fun to write!
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Mark Papadakis proslijedio/la je Tweet
Important: avoid messing with affinities. Several phones handle power management using Linux CPU hotplug events and will dynamically add/remove cores (and renumber existing ones). But affinity masks are tied to numerical core IDs. (Which after renumbering after different cores.)
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Mark Papadakis proslijedio/la je Tweet
Blogged: Best of 2019 in tech talks Topics include: - Linux - concurrency - Lots of malloc and mesh - performance - large scale computing - serverless - Spectre This is also the first year I’ve included presentations from academic conferences.https://link.medium.com/nw50nEyvz3
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“Sent from my iPhone” is the probably the best advertising and promotion idea of the century.
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Mark Papadakis proslijedio/la je Tweet
Linux is the first OS to support MPTCP v1, please give me that twitter dopamine. Lots... https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=08a45c59f16efe33ca715e894231a9b7afd3b7b4 …
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Mark Papadakis proslijedio/la je Tweet
This paper by
@ned14 should go a long way toward answering the question: Is the sender/receiver pattern from p0443 fast? Answer: Yes, definitely. http://wg21.link/p2052 Many thanks to Niall for demonstrating how to max out an OS's low-level IO with sender/receiver.#cppHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Mark Papadakis proslijedio/la je Tweet
#io_uring vs#epoll: simple echo server. io_uring +99% performance, -45% cpu usage. Wow.@axboe@VincentFree.
io_uring
.
Try for yourself:
io_uring: https://github.com/frevib/io_uring-echo-server …
epoll: https://github.com/frevib/epoll-echo-server …pic.twitter.com/JFfvdMvpVG
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Mark Papadakis proslijedio/la je Tweet
This is how The Irishman used CGI to make the actors look youngerpic.twitter.com/K5NnBfibH2
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Mark Papadakis proslijedio/la je Tweet
Everyone’s off work for the weekend, time to code!
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Mark Papadakis proslijedio/la je Tweet
Microsoft CEO
@satyanadella: "Today we are making the commitment that by 2030 Microsoft will become carbon negative. By 2050, we will remove from the environment all the carbon we have emitted since our company's founding in 1975." News event now:https://news.microsoft.com/climate/Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Mark Papadakis proslijedio/la je Tweet
Biggest news in a long time. After a ton of pressure, Blackrock--which owns more fossil fuel stock than anyone on earth--announces it will put 'climate change at the center of its investment strategy.' A huge--if by no means final--win for activists!https://www.nytimes.com/2020/01/14/business/dealbook/larry-fink-blackrock-climate-change.html?action=click&module=Top%20Stories&pgtype=Homepage …
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Maybe we can use “dove releases” as opposed to “canary releases” in software development. Argonauts _released_ a dove to see if it was safe to _pass_ through the Symplegades long before coal miners experimented with canaries. Greeks did it first;)
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Mark Papadakis proslijedio/la je Tweet
Given this discussion about spinlocks/etc ... now that we have consumer CPUs with 64 cores, can we just go back to cooperative multitasking? It would be much simpler, probably higher performance, and if a program hangs it won't stop the machine like in the old days.
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