November 2024
Intermediate to advanced
180 pages
5h 19m
French
Content preview from Observabilité Linux avec BPF
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Chapitre 2. Exécuter tes premiers programmes BPF
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La VM BPF est capable d'exécuter des instructions en réponse à des événements déclenchés par le noyau. Cependant, tous les programmes BPF n'ont pas accès à tous les événements déclenchés par le noyau. Lorsque tu charges un programme dans la VM BPF, tu dois décider quel type de programme tu vas exécuter. Cela informe le noyau de l'endroit où ton programme sera déclenché. Cela indique également au vérificateur BPF quelles aides vont être autorisées dans ton programme. Lorsque tu choisis le type de programme, tu choisis également l'interface que ton programme implémente. Cette interface garantit que tu as accès au type de données approprié, et que ton programme peut accéder directement aux paquets du réseau ou non.
Dans ce chapitre, nous te montrons comment écrire tes premiers programmes BPF. Nous te guidons également autour des différents types de programmes BPF que tu peux créer (à la date de rédaction de ce livre). Au fil des ans, les développeurs du noyau ont ajouté différents points d'entrée auxquels tu peux attacher des programmes BPF. Ce travail n'est pas encore terminé, et ils trouvent chaque jour de nouvelles façons de tirer parti de BPF. Dans ce chapitre, nous allons nous concentrer sur certains des types de programmes les plus utiles, dans l'intention de te donner un avant-goût de ce que tu peux ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.