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 RHEL

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 : count distribution 0 -> 1

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) FILENAME 13:25:03 git 3385 R

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 * debug a

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

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

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 <u901206

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 create

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 <u9012063@...> --- aci

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 eBPF/XD

Hi folks, We (Maciek and I) were on the call today, and were experiencing some audio/mic issues. We're looking for any documentation or usage models that people might have in flight already for BTF. O

Hello, I listened in on the IOVisor call today but wasn't sure if user questions and use cases where appropriate there so I started writing this... There are two things I was going to discuss: 1) We u

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 names

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

+dev

Hello all, Is there a way to receive asynchronous notification each time an eBPF map is modified? I used bpf_obj_pin() in order to save a specific map on filesystem, and I called linux inotify() on th

Bpf queue map is a new kind of map that provides a LIFO/FIFO queue implementation. In some applications, like a SNAT, it is necessary to keep track of a pool of free elemenets, network ports in this c

Bpf queue implements a LIFO/FIFO data containers for ebpf programs. It allows to push an element to the queue by using the update operation and to pop an element from the queue by using the lookup ope

The example is made by two parts, a eBPF program that consumes elements from a FIFO queue and prints them in the screen and a user space application that inserts new elements into the queue each time

Hi All, I have applied changes to add thenew helper: bpf_get_current_pidns_info using bpf-next branch. Let me know if what you think. From 932f55d885bf34443bb73ec4b24f9dd4b95b64c7 Mon Sep 17 00:00:00