How and When You Should Measure CPU Overhead of eBPF Programs Bryce Kahle, Datadog October 28, 2020 Why should I profile eBPF programs? CI variance tracking Tools kernel.bpf_stats_enabled kernel

insertion of powerful security visibility and control logic within Linux itself. Because eBPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsulation formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integration requirements. It works on almost host. The network is required to be capable to route the IP addresses of the application containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

insertion of powerful security visibility and control logic within Linux itself. Because eBPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsulation formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integration requirements. It works on almost host. The network is required to be capable to route the IP addresses of the application containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

insertion of powerful security visibility and control logic within Linux itself. Because eBPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsulation formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integration requirements. It works on almost host. The network is required to be capable to route the IP addresses of the application containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

insertion of powerful security visibility and control logic within Linux itself. Because BPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsulation formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integration requirements. It works on almost host. The network is required to be capable to route the IP addresses of the application containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

insertion of powerful security visibility and control logic within Linux itself. Because BPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsulation formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integration requirements. It works on almost host. The network is required to be capable to route the IP addresses of the application containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

insertion of powerful security visibility and control logic within Linux itself. Because BPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsulation formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integration requirements. It works on almost host. The network is required to be capable to route the IP addresses of the application containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

inser�on of powerful security visibility and control logic within Linux itself. Because BPF runs inside the Linux kernel, Cilium security policies can be applied and updated without any changes to the Currently VXLAN and Geneve are baked in but all encapsula�on formats supported by Linux can be enabled. When to use this mode: This mode has minimal infrastructure and integra�on requirements. It works on almost host. The network is required to be capable to route the IP addresses of the applica�on containers. When to use this mode: This mode is for advanced users and requires some awareness of the underlying networking

small enough”, he said to their spokesbee, “To fly straight to the engine room and work from the inside.” “Would you like to assist?” “Of course”, answered eBee, “We wish to help, to innovate, and we’re functionality of the operating system. eBPF is an event-driven architecture that runs specific programs when the kernel or an application passes a certain hook point. For example, kernel probes (kprobe) or the Silver Lining's powers. System calls Users can leverage the following objects or mechanisms when programming with eBPF: Share collected information, retrieve configuration options, and store state

Sometimes, eBPF programs can’t even load ● I couldn’t find good resources on this, so, here I am ● I break lots of eBPF programs ● The BPF Virtual machine is not easy to understand Why ? The BPF subsystem