Debugging the BPF Virtual Machine Lorenzo Fontana October 28, 2020 ● Debugging is useful to understand how things work ● Sometimes, eBPF programs can’t even load ● I couldn’t find good resources on this this, so, here I am ● I break lots of eBPF programs ● The BPF Virtual machine is not easy to understand Why ? The BPF subsystem lives in the kernel AND The kernel can be debugged using gdb The

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235 12.8 The source code translation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 5.3 Translation table from obsolete net-tools commands to new iproute2 commands . . . . . . . . . . . . . 105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 12.19List of source code translation tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236 Abstract

more information and information on how to make the most of your new Debian system. 警告 This translation of the installation guide is not up-to-date and currently there is noone actively working on updating information. Read or double-check the English variant, if in doubt. If you can help us with updating the translation, please contact debian-boot@lists.debian.org or the debian-l10n-xxx mailinglist for this language since you can be sure that the hardware is well-supported by GNU/Linux. If you do have to buy a machine with Windows bundled, carefully read the software license that comes with Windows; you may be able

resource scheduler used when high- and low-priority VMs are deployed together. It improves physical machine resource utilization while ensuring the QoS of high-priority VMs. Challenges The core technology rendering, and machine learning inference; while services not limited by latency can be used on low-priority VMs, such as video encoding, big data processing, offline rendering, and machine learning training GearOS can be used in automotive control, robotic control, programmable logic controller (PLC), and machine tool control. Challenges Modern industries must be equipped with intelligent information technologies

source host. For east-west type load balancing, Cilium performs efficient service-to-backend translation right in the Linux kernel’s socket layer (e.g. at TCP connect time) such that per-packet NAT operations CLUSTER_ZONE=us-west2-a gcloud container clusters create $CLUSTER_NAME --image-type COS --num- nodes 2 --machine-type n1-standard-4 --zone $CLUSTER_ZONE Retrieve the credentials to access the cluster: gcloud policies. It is a detailed walk-through of getting a single-node Cilium environment running on your machine. It is designed to take 15-30 minutes. If you haven’t read the Introduction to Cilium & Hubble yet

source host. For east-west type load balancing, Cilium performs efficient service-to-backend translation right in the Linux kernel’s socket layer (e.g. at TCP connect time) such that per-packet NAT operations In order to access the Hubble API, create a port forward to the Hubble service from your local machine. This will allow you to connect the Hubble client to the local port 4245 and access the Hubble Relay to the hubble-ui service in your Kubernetes cluster and make it available on a local port on your machine. cilium hubble ui Forwarding from 0.0.0.0:12000 -> 8081 Forwarding from [::]:12000 -> 8081 Tip

source host. For east-west type load balancing, Cilium performs efficient service-to-backend translation right in the Linux kernel’s socket layer (e.g. at TCP connect time) such that per-packet NAT operations In order to access the Hubble API, create a port forward to the Hubble service from your local machine. This will allow you to connect the Hubble client to the local port 4245 and access the Hubble Relay to the hubble-ui service in your Kubernetes cluster and make it available on a local port on your machine. cilium hubble ui Forwarding from 0.0.0.0:12000 -> 8081 Forwarding from [::]:12000 -> 8081 Tip

CLUSTER_ZONE=us-west2-a gcloud container clusters create $CLUSTER_NAME --image-type COS --num- nodes 2 --machine-type n1-standard-4 --zone $CLUSTER_ZONE Retrieve the credentials to access the cluster: gcloud policies. It is a detailed walk-through of getting a single-node Cilium environment running on your machine. It is designed to take 15-30 minutes. If you haven’t read the Introduction to Cilium & Hubble yet policies. It is a detailed walk-through of getting a single-node Cilium environment running on your machine. It is designed to take 15-30 minutes. If you haven’t read the Introduction to Cilium & Hubble yet

know on which CD/DVD to find a specific package, visit https://cdimage- search.debian.org/. If your machine doesn’t support CD booting (only relevant on very old PC systems), but you do have a CD set, you ”pxelinux.0”; } } 注意对于 PXE 引导来说，客户端文件名 pxelinux.0 是一个 boot loader，而非一个内核映象 (参见下面 的第 4.5.4 节)。If your machine uses UEFI to boot, you will have to specify a boot loader appropriate for UEFI machines, for example version: Date: Machine: machine (eg, IBM Thinkpad R32)> Processor: Memory: Partitions:

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know on which CD/DVD to find a specific package, visit https://cdimage- search.debian.org/. If your machine doesn’t support CD booting (only relevant on very old PC systems), but you do have a CD set, you ”pxelinux.0”; } } 注意对于 PXE 引导来说，客户端文件名 pxelinux.0 是一个 boot loader，而非一个内核映象 (参见下面 的第 4.5.4 节)。If your machine uses UEFI to boot, you will have to specify a boot loader appropriate for UEFI machines, for example version: Date: Machine: machine (eg, IBM Thinkpad R32)> Processor: Memory: Partitions:

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