Merging upstream version 1.46.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 185 deletions

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-<!--startmeta
-custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/ebpf.plugin/integrations/ebpf_shm.md"
-meta_yaml: "https://github.com/netdata/netdata/edit/master/collectors/ebpf.plugin/metadata.yaml"
-sidebar_label: "eBPF SHM"
-learn_status: "Published"
-learn_rel_path: "Data Collection/eBPF"
-most_popular: False
-message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE"
-endmeta-->
-
-# eBPF SHM
-
-
-<img src="https://netdata.cloud/img/ebpf.jpg" width="150"/>
-
-
-Plugin: ebpf.plugin
-Module: shm
-
-<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />
-
-## Overview
-
-Monitor syscall responsible to manipulate shared memory.
-
-Attach tracing (kprobe, trampoline) to internal kernel functions according options used to compile kernel.
-
-This collector is only supported on the following platforms:
-
-- Linux
-
-This collector supports collecting metrics from multiple instances of this integration, including remote instances.
-
-The plugin needs setuid because it loads data inside kernel. Netada sets necessary permission during installation time.
-
-### Default Behavior
-
-#### Auto-Detection
-
-The plugin checks kernel compilation flags (CONFIG_KPROBES, CONFIG_BPF, CONFIG_BPF_SYSCALL, CONFIG_BPF_JIT) and presence of BTF files to decide which eBPF program will be attached.
-
-#### Limits
-
-The default configuration for this integration does not impose any limits on data collection.
-
-#### Performance Impact
-
-This thread will add overhead every time that an internal kernel function monitored by this thread is called. The estimated additional period of time is between 90-200ms per call on kernels that do not have BTF technology.
-
-
-## Metrics
-
-Metrics grouped by *scope*.
-
-The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
-
-
-
-### Per cgroup
-
-These Metrics show grouped information per cgroup/service.
-
-This scope has no labels.
-
-Metrics:
-
-| Metric | Dimensions | Unit |
-|:------|:----------|:----|
-| cgroup.shmget | get | calls/s |
-| cgroup.shmat | at | calls/s |
-| cgroup.shmdt | dt | calls/s |
-| cgroup.shmctl | ctl | calls/s |
-| services.shmget | a dimension per systemd service | calls/s |
-| services.shmat | a dimension per systemd service | calls/s |
-| services.shmdt | a dimension per systemd service | calls/s |
-| services.shmctl | a dimension per systemd service | calls/s |
-
-### Per apps
-
-These Metrics show grouped information per apps group.
-
-Labels:
-
-| Label      | Description     |
-|:-----------|:----------------|
-| app_group | The name of the group defined in the configuration. |
-
-Metrics:
-
-| Metric | Dimensions | Unit |
-|:------|:----------|:----|
-| app.ebpf_shmget_call | calls | calls/s |
-| app.ebpf_shmat_call | calls | calls/s |
-| app.ebpf_shmdt_call | calls | calls/s |
-| app.ebpf_shmctl_call | calls | calls/s |
-
-### Per eBPF SHM instance
-
-These Metrics show number of calls for specified syscall.
-
-This scope has no labels.
-
-Metrics:
-
-| Metric | Dimensions | Unit |
-|:------|:----------|:----|
-| system.shared_memory_calls | get, at, dt, ctl | calls/s |
-
-
-
-## Alerts
-
-There are no alerts configured by default for this integration.
-
-
-## Setup
-
-### Prerequisites
-
-#### Compile kernel
-
-Check if your kernel was compiled with necessary options (CONFIG_KPROBES, CONFIG_BPF, CONFIG_BPF_SYSCALL, CONFIG_BPF_JIT) in `/proc/config.gz` or inside /boot/config file. Some cited names can be different accoring preferences of Linux distributions.
-When you do not have options set, it is necessary to get the kernel source code from https://kernel.org or a kernel package from your distribution, this last is preferred. The kernel compilation has a well definedd pattern, but distributions can deliver their configuration files
-with different names.
-
-Now follow steps:
-1. Copy the configuration file to /usr/src/linux/.config.
-2. Select the necessary options: make oldconfig
-3. Compile your kernel image: make bzImage
-4. Compile your modules: make modules
-5. Copy your new kernel image for boot loader directory
-6. Install the new modules: make modules_install
-7. Generate an initial ramdisk image (`initrd`) if it is necessary.
-8. Update your boot loader
-
-
-#### Debug Filesystem
-
-This thread needs to attach a tracepoint to monitor when a process schedule an exit event. To allow this specific feaure, it is necessary to mount `debugfs` (`mount -t debugfs none /sys/kernel/debug/`).`
-
-
-
-### Configuration
-
-#### File
-
-The configuration file name for this integration is `ebpf.d/shm.conf`.
-
-
-You can edit the configuration file using the `edit-config` script from the
-Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory).
-
-```bash
-cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
-sudo ./edit-config ebpf.d/shm.conf
-```
-#### Options
-
-This configuration file have two different sections. The `[global]` overwrites all default options, while `[syscalls]` allow user to select the syscall to monitor.
-
-
-<details><summary>Config options</summary>
-
-| Name | Description | Default | Required |
-|:----|:-----------|:-------|:--------:|
-| update every | Data collection frequency. | 5 | no |
-| ebpf load mode | Define whether plugin will monitor the call (`entry`) for the functions or it will also monitor the return (`return`). | entry | no |
-| apps | Enable or disable integration with apps.plugin | no | no |
-| cgroups | Enable or disable integration with cgroup.plugin | no | no |
-| pid table size | Number of elements stored inside hash tables used to monitor calls per PID. | 32768 | no |
-| ebpf type format | Define the file type to load an eBPF program. Three options are available: `legacy` (Attach only `kprobe`), `co-re` (Plugin tries to use `trampoline` when available), and `auto` (plugin check OS configuration before to load). | auto | no |
-| ebpf co-re tracing | Select the attach method used by plugin when `co-re` is defined in previous option. Two options are available: `trampoline` (Option with lowest overhead), and `probe` (the same of legacy code). | trampoline | no |
-| maps per core | Define how plugin will load their hash maps. When enabled (`yes`) plugin will load one hash table per core, instead to have centralized information. | yes | no |
-| lifetime | Set default lifetime for thread when enabled by cloud. | 300 | no |
-| shmget | Enable or disable monitoring for syscall `shmget` | yes | no |
-| shmat | Enable or disable monitoring for syscall `shmat` | yes | no |
-| shmdt | Enable or disable monitoring for syscall `shmdt` | yes | no |
-| shmctl | Enable or disable monitoring for syscall `shmctl` | yes | no |
-
-</details>
-
-#### Examples
-There are no configuration examples.
-
-