Brendan Gregg

JULY 4, 2021

It's an exciting time for developments in computer performance, not just for the BPF technology (which I often [write about]) but also for processors with 3D stacking and cloud vendor CPUs (e.g., In case you are interested, at the same conference I also gave a talk on [BPF Internals].

Performance 52

Performance Latency Hardware Storage 52

Brendan Gregg

JULY 2, 2021

There's an arms race to add [eBPF] (BPF) to commercial observability products, and in this post I'll describe how to quickly do that. People like to show me their BPF observability products after they have prototyped or built them, but I often wish I had given them advice before they started. You might not even like BPF.

Open Source 40

Open Source Latency Cache Energy 40

Brendan Gregg

MAY 28, 2021

Back in 2015 we'd have BPF (iovisor) meetups in Santa Clara and most contributors would be there in person, with some having travelled. But I'm now excited about my new adventure: Doing an advanced tech role remotely from Australia. I know others who have also left the Bay Area or are planning to.

Google 144

Google Open Source Engineering AWS 144

Brendan Gregg

JUNE 3, 2021

Later on I wrote much better socket tools (in my [DTrace] and [BPF] books). I'm reminded of this first case since my BPF tools are now appearing in observability products, and will grow to a scale much bigger than my DTrace tools. . ## Other Cases Of all the tools I had published as open source, I still can't believe socketsnoop.d

Open Source 40

Open Source Code Engineering Technology 40

Brendan Gregg

MAY 8, 2021

biolatency (this is my BPF tool from [bcc]), printing 60-second histograms, per disk (-D): # biolatency -D 60 1. biosnoop (this is my BPF tool from [bcc]), printing every disk event: # biosnoop. This output shows 10-second statistical summaries. Massive r_await with little aqu-sz, as mentioned earlier. Tracing block device I/O.

Performance 142

Performance Latency Speed Systems 142

Brendan Gregg

AUGUST 26, 2021

bpftrace tool from my BPF book traces the signal:signal_generate tracepoint, which should catch every type of generated signal, including tgkill(2). Trying it out: # bpftrace /home/bgregg/Git/bpf-perf-tools-book/originals/Ch13_Applications/signals.bt. signals.bt The signals.bt Attaching 3 probes. Counting signals.

Storage 145

Storage C++ Processing Database 145

Brendan Gregg

MAY 28, 2021

Back in 2015 we'd have BPF (iovisor) meetups in Santa Clara and most contributors would be there in person, with some having travelled. But I'm now excited about my new adventure: Doing an advanced tech role remotely from Australia. I know others who have also left the Bay Area or are planning to.

Google 40

Google Engineering Open Source AWS 40

Brendan Gregg

MAY 8, 2021

biolatency (this is my BPF tool from [bcc]), printing 60-second histograms, per disk (-D): # biolatency -D 60 1 Tracing block device I/O. biosnoop (this is my BPF tool from [bcc]), printing every disk event: # biosnoop TIME(s) COMM PID DISK T SECTOR BYTES LAT(ms) 0.000000 dd 16014 sdb R 37144544 131072 77.96 Hit Ctrl-C to end.

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

biolatency (this is my BPF tool from [bcc]), printing 60-second histograms, per disk (-D): # biolatency -D 60 1. biosnoop (this is my BPF tool from [bcc]), printing every disk event: # biosnoop. This output shows 10-second statistical summaries. Massive r_await with little aqu-sz, as mentioned earlier. Tracing block device I/O.

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

AUGUST 26, 2021

bpftrace tool from my BPF book traces the signal:signal_generate tracepoint, which should catch every type of generated signal, including tgkill(2). Trying it out: # bpftrace /home/bgregg/Git/bpf-perf-tools-book/originals/Ch13_Applications/signals.bt signals.bt The signals.bt Attaching 3 probes. Counting signals.

Storage 40

Storage C++ Processing Database 40