I'm ok with the workaround code, but I'd like a comment that clearly explains it for future maintainers and copy-n-pasters. Eg: // Skip entries with backwards time: temp workaround for #728 Then

Jiri, The change looks good. Could you generate a pull request against the bcc/iovisor github repository? Thanks! Yonghong

While using ext4dist on RHEL7 we occasionally get following screwed up latencies: # ext4dist Tracing ext4 operation latency... Hit Ctrl-C to end. ^C operation = write usecs

While using xfsslower on RHEL7 we occasionally get following screwed up latencies: # xfsslower Tracing XFS operations slower than 1 ms TIME COMM PID T BYTES OFF_KB LAT(ms)

hi, on RHEL7 we are facing timing issues in some bcc-tools scripts. The time subsystem might return backward timestamp via bpf_ktime_get_ns and thus screw up latency computation. This seems to be

Thanks all for joining the call today. As usual, here are my notes. -Brenden === Discussion === Yonghong: * Internal discussions for BTF related work * adding information to jit instructions *

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

This is a call for proposals for the BPF micro-conference at the Linux Plumbers Conference (LPC) 2018 which will be held in Vancouver, Canada from the 13th to the 15th of November, co-located with

The patch adds the test framework for OVS using afxdp. Currently there are two test cases, using ping and http as traffic forwarding through ovs with 2 afxdp netdev. Signed-off-by: William Tu

The patch creates a new netdev type "afxdp" and copies some of the afxdp api implementation from xdpsock_user.c at linux sample code. The afxdp ebpf programs/maps are loaded when dpif-netdev is

AF_XDP requires attaching an xdp program and xskmap for each netdev. The patch provides these program/map and the loading and attaching implementation. Signed-off-by: William Tu

The patch series introduces AF_XDP support for OVS netdev. AF_XDP is a new address family working together with eBPF. In short, a socket with AF_XDP family can receive and send packets from an

"PJ Waskiewicz" <peter.waskiewicz.jr@...> wrote: I noticed that Arnaldo is playing with pahole (see twitter[1]) and converting dwarf into BTF (BPF Type Format), and have written a very nice

Depends on what rates you are targeting, you might want to check BPF raw tracepoints to reduce overhead given this would be in hot path. From f6ef56589374 ("Merge branch 'bpf-raw-tracepoints'") that

Looks good. Only one comment in the below. After you addressed it, you can send the patch to netdev with patch prefix [PATCH bpf-next]. Please move this definition to the end of file.

Currently, we are still in the design and prototyping stage. Will definitely share for comments once we got some concept design and RFC implementation.

Hi All, Thanks for attending today. As usual, here are my notes. === Discussion === Yonghong: * reviewing new queue map type * patch set in netdev * new helper for getting pid, other info within

Yonghong Song, Let me know what you think of this last patch From 49d9dbcbd52c82dc44b6351ac1824538a6db155a Mon Sep 17 00:00:00 2001 From: cneira <cneirabustos@...> Date: Wed, 8 Aug 2018

There are some initial bits on BTF (mostly on the workflow for now) in the Cilium doc that can be found here: - http://cilium.readthedocs.io/en/latest/bpf/#llvm -

<peter.waskiewicz.jr@...> wrote: I expect to use BTF as a source for kernel struct information, as a lightweight version of debuginfo (and hopefully one day BTF info will be included in the