Hi All, We have the bi-weekly phone conference scheduled for two days from now, does anybody have a discussion topic to add to the agenda? As a reminder, we are planning to hold the meeting only if ag

Raghavendra Rao reported that memleak does not display proper name of the related kernel module, but just the "kernel" string, like here for xfs module functions: 131072 bytes in 4 allocations from st

I'm playing with bcc to prototype an UDP load balancer. I'm facing an issue that I didn't succeed to understand... In my code I tried to validate my UDP packet using code like this : struct udphdr *ud

G'Day, Many of you already know (and have been helping, thanks) and we've discussed this on the iovisor call before: my book is finally launched properly. Some URLs: http://www.brendangregg.com/blog/2

This is a call for proposals for the BPF micro-conference at this years' Linux Plumbers Conference (LPC) 2019 which will be held in Lisbon, Portugal for September 9-11. The goal of the BPF micro-confe

Hi, Can anyone help me with an example of a GO-bpf program using TC Thanks, Kanthi

Hi All, As per the discussion from last meeting, this week's meeting will be provisional on having a proposed agenda rather than free-form. Therefore, please reply if there is a topic that you would l

We just released bpftrace v0.9.1. This turned into a pretty big release, with almost 200 commits and 3 months since v0.9.0. We'll try to have smaller development cycles for the next releases. Some hig

In https://lists.iovisor.org/g/iovisor-dev/topic/how_to_make_redirect_map/31867035 I have built up an environment to make veth+XDP work. There're some question when I do some performance test 1. When

G'Day, This is the biggest change afoot to the bpftrace API, and I think we can sort it out quickly without fuss, but it is worth sharing here. This is from https://github.com/iovisor/bpftrace/issues/

Following on from the call... Does this sound even better? (mapping from the JVM for comparison): The JVM is a specification of a virtual machine that runs Java bytecode. It is implemented by a Java R

Hi all, Thanks for dialing in to the meeting this week. Going forward, in order to conserve everyone's time, we will be polling ahead of time for an agenda, and foregoing the online meeting in favor o

Please join us tomorrow for our bi-weekly call. As usual, this meeting is open to everybody and completely optional. You might be interested to join if: You want to know what is going on in BPF land Y

Hi all, Recently I try to build a network topology to test redirect_map, the topology is as below and the build script in the attachment(setup_env.sh). My test case is run `ping` from netns ns1 to 192

Hi all, I have a use case that the user daemon needs to trigger the execution of a TCP-BPF program (which was loaded already by the same user daemon). This may be a trivial question but after searchin

Hi, I am implementing a EBPF based packet replicator running as part of TC classisifer. The problem is I am not able to scale beyond 28K, once the pps rate goes beyond 28kpps I see traffic loss and th

I am seeing unexpected behavior from bpf_obj_get, although this is likely due to my inexperience with BPF. In a loader program, I create a pinned map at "sys/fs/bpf/test/xdp_stats_map". In a separate

I'm reading through codegen_llvm.cpp[0] and I noticed that ustack map keys are packed with a PID. From what I understand, if you run bpftrace -e 'uprobe:/lib64/libc.so.6:usleep /comm == "a.out"/ { @[u

Hi all, Thanks for joining in to the call today. As usual, here are my notes. Cheers, Brenden === Discussion === Daniel: - Some cilium debugging for loadbalancing case - Fix sendmsg hooks for unconnec

Hi all, What kind of network topology should I set up to make xdp_redirect_map.py runnable and what user-case this example represent for? PS: I have the same question about xdp_macswap_count.py too Th