Відео

nice!

they present linux but all of them use MacOS

Thank you for a wonderful session, much appreciated. 👏

am I the only one enjoying the sound effect? also how to get the keyboard amd scroll sound effect?

unprepared and confused

next level hand movement

I'm speechless than you

the sounds are extremely annoying. i was excited to watch the video but it is too much spoiled

Amazing talk! Lots of great info, a little too fast. I had to watch it at x0.75 speed jaja

Is that a bee or a dragon fly? Isn't that CSRA in SHV?

Hi Sir, Can you post more videos as your videos are very very knowledgeable and I am learning a lot ? Please post more videos

Really good, what an interesting guy Brendan Gregg is.

he didn't lie with that title.

you should try screaming at babies next

Hi Brendan, reading your excellent Systems Performance book. Looked up the reference in page 20 and found this video, but the link in the book, same as the one in this video's description box, no longer works. Managed to still find the blog post though, but has a different URL starting with netflixtechblog

This is golden

I hope you are continuing to scream at hard drives

You sir, are a legend.

Would have been better if video was of 60 secs 😄

Great talk. Can’t imagine how annoying the sound effects were for the in-person audience 😂

666

Thank you!

This is something Id like to see in my UA-cam shorts recommendation

Best lecture I have ever seen

fantastic !

Although it has been a couple of years since this presentation a lot of pitfalls are still relevant today. I cannot help to point out that the tcpdump for a 10Mbit link very likely dropped packets because tcpdump was run without specifying -n option, making tcpdump do dns lookups to resolve addresses to hostnames.

what is the advantage and disadvantage of java/jvm on freebsd compared to Linux? do you have any performance advantage?

"more than 80 characters is a sin in unix world" :):):) didnt know but yea, makes sence. Norway

like.

"My name is Brendan"....he is also modest.

maybe this one is a little bit advanced

Thank you man, I will definitely copy yours methods

1:38 and 15:27 perf_events Read about it here too www.brendangregg.com/perf.html

Very informative! keep going!

Which tools are used for monitoring network usage/performance of a process?

Hi Brendan, You are not by any chance available for freelance performance trouble shooting projects?

I see Linux is still *built by nerds and for the nerds*.

Thank you very much

Why would you need unicode to make a grey scale in your terminal ?

wtf is this macintosh :(

wtf is this macintosh :(

Actually, looking in "man syscall" for the calling convention is slightly wrong, because that manpage describes the calling convention for doing a system call, but you're tracing just a regular function call. Fortunately, the convention is mostly the same, except for the 4th argument, which for a function call is rcx, but the manpage would have told you that it's r10.

OMG!! I really need it.

FIO - 09:55

Hi guys, can anyone tell how is it possible to collect all metrics from Linux and visualize them in windows OS? How to make a bridge or connection between Linux and Windows and what are the technologies to be used.

Thanks Brendan :) You are awesome.

This is amazing. true love for the bits and bytes

05:03 tcplife, tcpdump 08:19 linux 4.4+ 19:40 linux perf analysis in 60s

00:11 ss 00:26 iptraf 00:37 iotop 00:54 slabtop 01:17 pcstat 01:38 perf_events, part of the linux source code 02:02 tiptop, PMC's 03:38 rdmsr ****************************** Advanced tracers ****************************** 05:28 linux observability tools 09:50 imbench, benchmarking 10:40 pchar *************************** 11:18 tuning tools ************************** Static tools 13:07 ? storage devices 14:02 routing table, netstat, ip route get 15:31 perf_events, great cpu profiler, perf report 21:00 workflow for perf_events 23:30 linux tracing tools 24:17 choosing a tracer 25:01 ftrace in the linux source code,

07:08 system is running slow, commands 07:11 top (10) 07:31 iotop 07:45 iostat -xz 1 (6) 07:57 netstat 08:14 ss 08:34 dstat 08:43 sar -n DEV 1 (8) 08:59 vmstat (3) 09:10 | 09:49 strace 10:17 what do they mean by the system is slow, latency 11:51 packages, sysstat, procps, coreutils ============================================ 12:07 Anti-methodologies ============================================ 12:13 street light anti-method 13:25 drunk man anti-method 13:59 blame someone else anti-method 14:43 | 16:02 problem statement method ============================================ 16:30 workload characterization method 17:48 USE method, utilization, saturation, errors 18:58 USE method for hardware systems 21:20 off-CPU Analysis 22:36 CPU profile method 24:26 RTFM Method 24:54 reading linux source code, jvm 26:50 How do you measure them ###################### 27:07 observability tools ###################### 27:18 uptime (1) 30:02 top (or htop) 31:57 ps -ef 32:28 vmstat 1 (3) 33:28 instant-xmdz 36:02 mpstat -P ALL 1 (4) 36:14 free -m (7) 36:46 latency is much higher, can you debug it 42:32 observability tools: basic *********************** intermediate *********************** 42:48 strace 44:21 tcpdump 46:15 net stat, nicstat 46:49 pidstat 1 (5) 47:21 swapon 47:33 lsof 47:58 sar (8) 50:38 app is taking forever 50:45 | 51:17 pidstat, system time 50:57 system time, iostat 51:26 am i swapping ? vmstat 51:51 strace