ioztat VS bcc

Also: https://github.com/jimsalterjrs/ioztat

It might be worth installing and firing up ioztat to see if you can identify where you're experiencing the latency issues.

Have you considered using ioztat to try to isolate the problematic bits of the workload? If you go this route, it would help to carve your home directory (or wherever you're doing the most work that hits disk) into discrete datasets--eg make ~/Pictures, ~/Videos, ~/Documents their own datasets.

See if someone asked me had I done anything with zfs after I was bragging about it, I might just link to this: https://github.com/jimsalterjrs/ioztat/blob/main/ioztat

While we're on the subject of testing ZFS scripts, I've done loads with ioztat — /r/zfs' answer to zfs iostat — and plan on releasing 2.0 soon. If you want to kick the tires on that, now is certainly the time to do it.

But wait, there's more! Enter the BCC toolkit and library, your trusty sidekick in simplifying the arcane art of writing eBPF applications. With BCC by your side, you'll be wielding eBPF like a seasoned pro in no time.

Nice - I normally use [bash-readline](https://github.com/iovisor/bcc/blob/master/tools/bashreadlin...) when coworking/co-inhabiting a server or training someone.

One of the big wins is not so much “build and run your own stuff” but there are very nice low-cost (in terms of compute) performance utilities built on eBPF

https://github.com/iovisor/bcc

There are so many utilities in that list; there’s a diagram midway down the readme which tries to help show their uses. bcc-tools should be available in any distro.

Also, Brendan Gregg does a ton of performance stuff that is worth knowing about if you check out his other work. Not eBPF only. Flame graphs are useful.

Reference: https://github.com/iovisor/bcc/blob/master/libbpf-tools/memleak.c

In this article, we'll build a basic version of an HTTPS sniffer, inspired by bcc-sslsniff.py, but we'll use Rust and Aya. We're going to demonstrate the capabilities of uprobes by employing uprobe and uretprobe along with familiar maps like PerCpuArray, HashMap, and PerEventArray. This will be a straightforward example to help us explore how uprobes function.

As xpd program I am using the BCC example xdp_redirect_map.py in skb mode as my NIC does not support native mode, attaching the program to veth2 and a dummy function to veth3

https://github.com/iovisor/bcc/blob/master/docs/reference_gu...