Arnaldo Carvalho de Melo (@acmel) header
Arnaldo Carvalho de Melo (@acmel) profile picture

Arnaldo Carvalho de Melo

@acmel

Linux perf tools maintainer, pahole for understanding your data structures, eBPF tinkerer, DE@Red Hat. https://teapaw.org/t.co/fjrVEUxCh1

 Brazil
acmel.wordpress.com
Joined April 2009
  • Tweets7.2K
  • Following64
  • Followers2.1K
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Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)Photo by Arnaldo Carvalho de Melo (@acmel)
Arnaldo Carvalho de Melo retweeted
The Kobeissi Letter (@KobeissiLetter) profile picture
The Kobeissi Letter
@KobeissiLetterJan 18
China’s credit crisis is worsening: New bank loans in China dropped -1.83 trillion yuan in 2025, or -10%, to 16.27 trillion yuan, the lowest since 2018. This marks their 2nd consecutive annual decline. China has been in an extended credit slowdown since early 2023, with the economy trapped in a deflationary spiral. Weakness has been driven by sluggish demand from borrowers, as weak consumer confidence and declining business investment have eroded appetite for new debt. China's 2008 moment is now.
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The concept of neural pruning was presented to me in a very personal way, but after some initial shock, it looks awesome, so, since Blue Sky seems to be taking off, time for a social net neural pruning! Unfollow me, let's meet on the other social net, lemme go on doing my part.
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Arnaldo Carvalho de Melo retweeted
Brendan Gregg (@brendangregg) profile picture
Brendan Gregg@brendangregg30 Oct 2024
AI Flame Graphs: Showing what's actually running on the HW and how we got there. Uses Intel EU stall profiling and eBPF. brendangregg.com/blog/2024-1…
Image from Brendan Gregg (@brendangregg)
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This was a fantastic experience, in previous KR editions I watched the auctions as something like a noble effort. But this is not just noble, its required, its part of being a citizen of the world, doing what you think should be done, talking the talk, walking the walk. Do it.
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Excellent wrap-up for this year's #Linux #perf_tools GSoC work: lore.kernel.org/all/CAH0uvoh… Thanks a lot to @howardchu_ for the excellent work, having a BTF enabled 'perf trace' was something we really wanted for a long time, everything should land on Linux v6.12!
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Arnaldo Carvalho de Melo retweeted
MIT CSAIL (@MIT_CSAIL) profile picture
MIT CSAIL
@MIT_CSAIL25 Aug 2024
Today in 1991, Linus Torvalds announced in a newsgroup that he was working on a free operating system that later came to be called Linux. bit.ly/2ZjgGtO
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Arnaldo Carvalho de Melo retweeted
Vasileios Kemerlis (@vkemerlis) profile picture
Vasileios Kemerlis@vkemerlis13 Aug 2024
📢 @di_jin42 will be presenting our work on hardening #Linux (e)BPF against transient execution attacks at @USENIXSecurity '24 tomorrow (Aug. 14, 1:45pm Track 2)! Joint work with @ajgaidis. cs.brown.edu/~vpk/papers/bee… | gitlab.com/brown-ssl/beebox | #brownssl #beebox #ebpf #bpf #usesec24
Image from Vasileios Kemerlis (@vkemerlis)
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Decades later, still useful. #Linux – at Marechal Deodoro, Brasil
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Conhece alguém que pode ser uma ótima pessoa para ministrar uma oficina mão na massa na LHC Hacker Week (de preferência aqui da região) e acha que deveríamos convidá-la? Se sim, preencha o formulário no link a seguir (são apenas 3 perguntas) forms.gle/QrVWP5Ad7xSy3ekC6
Image from Laboratório Hacker de Campinas (@lhc_campinas)
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#kernel_recipes feelings. #kr2024 #linux – at Marechal Deodoro, Brasil
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New 5k PR 00:27:47 !turtles all the way down 8-) #5k #50s #Linux Check out my activity on Strava: strava.app.link/93gIlV5XhLb – at Maceió, Brazil
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Arnaldo Carvalho de Melo retweeted
Livraria Leonardo da Vinci (@LivdaVinci) profile picture
Livraria Leonardo da Vinci@LivdaVinci15 Jul 2024
Igrejas são isentas de IPTU; livrarias não. É só um sintoma, talvez o menor. As últimas livrarias resistem na inóspita paisagem da cidade, tomada por comerciantes da fé, farmácias e bunkers pra quem tem muito dinheiro. O tempo pobre e a livraria pobre fundem-se no mesmo impasse
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Long tradition: walking on water – at Marechal Deodoro, Brasil
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A follower – at Marechal Deodoro, Brasil
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Going to plumbers, pet peeves/ideas for the #Linux #perf_tools? Consider this: lore.kernel.org/linux-perf-u…
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2nd vacations 5k: 27⁰C, feels like 31⁰C 00:30:13 #linux_5k #linux #5k – at Cabo Branco, João Pessoa
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Recharge station: Sugarcane juice. – at João Pessoa, Brazil
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Line of those must be number 6 here: en.m.wikipedia.org/wiki/List… #jampa #paraiba #brasil – at João Pessoa, Brazil
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Thru my head: South America's Lands end/Finisterre: reddit.com/r/MapPorn/comment… – at João Pessoa, Brazil
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1st 5k on these vacations 00:30:00, too close to the mid of the planet & of the day :-/ strava.app.link/5RB3Ap4Q5Kb #Linux #jampa #5k – at João Pessoa, Brazil
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