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Search - "cpu"
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Biggest challenge I overcame as dev? One of many.
Avoiding a life sentence when the 'powers that be' targeted one of my libraries for the root cause of system performance issues and I didn't correct that accusation with a flame thrower.
What the accusation? What I named the library. Yep. The *name* was causing every single problem in the system.
Panorama (very, very expensive APM system at the time) identified my library in it's analysis, the calls to/from SQLServer was the bottleneck
We had one of Panorama's engineers on-site and he asked what (not the actual name) MyLibrary was and (I'll preface I did not know or involved in any of the so-called 'research') a crack team of developers+managers researched the system thoroughly and found MyLibrary was used in just about every project. I wrote the .Net 1.1 MyLibrary as a mini-ORM to simplify the execution of database code (stored procs, etc) and gracefully handle+log database exceptions (auto-logged details such as the target db, stored procedure name, parameter values, etc, everything you'd need to troubleshoot database errors). This was before Dapper and the other fancy tools used by kids these days.
By the time the news got to me, there was a team cobbled together who's only focus was to remove any/every trace of MyLibrary from the code base. Using Waterfall, they calculated it would take at least a year to remove+replace MyLibrary with the equivalent ADO.Net plumbing.
In a department wide meeting:
DeptMgr: "This day forward, no one is to use MyLibrary to access the database! It's slow, unprofessionally named, and the root cause of all the database issues."
Me: "What about MyLibrary is slow? It's excecuting standard the ADO.Net code. Only extra bit of code is the exception handling to capture the details when the exception is logged."
DeptMgr: "We've spent the last 6 weeks with the Panorama engineer and he's identified MyLibrary as the cause. Company has spent over $100,000 on this software and we have to make fact based decisions. Look at this slide ... "
<DeptMgr shows a histogram of the stacktrace, showing MyLibrary as the slowest>
Me: "You do realize that the execution time is the database call itself, not the code. In that example, the invoice call, it's the stored procedure that taking 5 seconds, not MyLibrary."
<at this point, DeptMgr is getting red-face mad>
AreaMgr: "Yes...yes...but if we stopped using MyLibrary, removing the unnecessary layers, will make the code run faster."
<typical headknodd-ers knod their heads in agreement>
Dev01: "The loading of MyLibrary takes CPU cycles away from code that supports our customers. Every CPU cycle counts."
<headknod-ding continues>
Me: "I'm really confused. Maybe I'm looking at the data wrong. On the slide where you highlighted all the bottlenecks, the histogram shows the latency is the database, I mean...it's right there, in red. Am I looking at it wrong?"
<this was meeting with 20+ other devs, mgrs, a VP, the Panorama engineer>
DeptMgr: "Yes you are! I know MyLibrary is your baby. You need to check your ego at the door and face the facts. Your MyLibrary is a failed experiment and needs to be exterminated from this system!"
Fast forward 9 months, maybe 50% of the projects updated, come across the documentation left from the Panorama. Even after the removal of MyLibrary, there was zero increases in performance. The engineer recommended DBAs start optimizing their indexes and other N+1 problems discovered. I decide to ask the developer who lead the re-write.
Me: "I see that removing MyLibrary did nothing to improve performance."
Dev: "Yes, DeptMgr was pissed. He was ready to throw the Panorama engineer out a window when he said the problems were in the database all along. Didn't you say that?"
Me: "Um, so is this re-write project dead?"
Dev: "No. Removing MyLibrary introduced all kinds of bugs. All the boilerplate ADO.Net code caused a lot of unhandled exceptions, then we had to go back and write exception handling code."
Me: "What a failure. What dipshit would think writing more code leads to less bugs?"
Dev: "I know, I know. We're so far behind schedule. We had to come up with something. I ended up writing a library to make replacing MyLibrary easier. I called it KnightRider. Like the TV show. Everyone is excited to speed up their code with KnightRider. Same method names, same exception handling. All we have to do is replace MyLibrary with KnightRider and we're done."
Me: "Won't the bottlenecks then point to KnightRider?"
Dev: "Meh, not my problem. Panorama meets primarily with the DBAs and the networking team now. I doubt we ever use Panorama to look at our C# code."
Needless to say, I was (still) pissed that they had used MyLibrary as dirty word and a scapegoat for months when they *knew* where the problems were. Pissed enough for a flamethrower? Maybe.10 -
Oh dear, a scaling problem I solved was replacing some Regex matching with simpler string functions. While I'm a huge fan of Regex, it's unreal how much performance they can suck out of some high-n loops...
I got about 120x out of some critical code thus making a CPU upgrade unnecessary.8 -
ha...
that I did NOT expect.
Opening a website in chrome. Laptop's transforms into a drone and tries to lift off my desk and fly away with its fans. I see warning popups telling me that CPU Tº is 100ºC.
Opening website in FF. Laptop calmly opens it up and raises Tº from 50ºC to only 75ºC.
And here I thought that Chrome is fine-tuned for anything you can throw at it.
And the website really has nothing fancy in it... Just some text to read, images to see in the background and some buttons to click on.
https://ignitis.lt/lt/...
its EN version, however, does not have the laptop-heater feature installed.
WTF11 -
Not entirely dev related, but...
I'm getting tired of (electrical, mechanical) engineers complaining about HW limitations like "oh this board only has 12 KB of flash memory" or "I can't make this thing move smoother because my CPU is only 16 MHz" Bitch, you can spend $500 on 3 servo motors, but you can't afford to pay extra $5 to get a board with better specs to control them?10 -
I'm trying to code here and can't do find/replace in SQL Server mgmt studio because fucking "antimalware" malware uses most of my CPU. I'm sure Microsoft is mining crypto3
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At the institute I did my PhD everyone had to take some role apart from research to keep the infrastructure running. My part was admin for the Linux workstations and supporting the admin of the calculation cluster we had (about 11 machines with 8 cores each... hot shit at the time).
At some point the university had some euros of budget left that had to be spent so the institute decided to buy a shiny new NAS system for the cluster.
I wasn't really involved with the stuff, I was just the replacement admin so everything was handled by the main admin.
A few months on and the cluster starts behaving ... weird. Huge CPU loads, lots of network traffic. No one really knows what's going on. At some point I discover a process on one of the compute nodes that apparently receives commands from an IRC server in the UK... OK code red, we've been hacked.
First thing we needed to find out was how they had broken in, so we looked at the logs of the compute nodes. There was nothing obvious, but the fact that each compute node had its own public IP address and was reachable from all over the world certainly didn't help.
A few hours of poking around not really knowing what I'm looking for, I resort to a TCPDUMP to find whether there is any actor on the network that I might have overlooked. And indeed I found an IP adress that I couldn't match with any of the machines.
Long story short: It was the new NAS box. Our main admin didn't care about the new box, because it was set up by an external company. The guy from the external company didn't care, because he thought he was working on a compute cluster that is sealed off behind some uber-restrictive firewall.
So our shiny new NAS system, filled to the brink with confidential research data, (and also as it turns out a lot of login credentials) was sitting there with its quaint little default config and a DHCP-assigned public IP adress, waiting for the next best rookie hacker to try U:admin/P:admin to take it over.
Looking back this could have gotten a lot worse and we were extremely lucky that these guys either didn't know what they had there or didn't care. -
Upgraded from a gen 6 motherboard and cpu to a gen 11. And the difference is asounding.
My old setup did everything I needed it to pretty well. Hell it got me through college as well as multiple part time and full time jobs. As well as the system that I learned about 80% of what I know specifically for my career
But alas the old cpu's age started showing and I'd consistently throttle multiple threads when compiling or even just using 7z on large folders. Hell deleting anything above a couple hundred mb would pause for a few seconds
The new cpu is immensely faster on such tasks (probably cause of the extra 2 cores and cpu improvements since gen 6)
I haven't been this excited since I got my first SSD a few years ago and saw the immense boot time improvements. Maybe soon I'll get an nvme drive and really be zooming with this setup 🤣🤣🤣7 -
I hate being in program purgatory. You don't know whether your program froze, or the CPU is hustling to crunch out those numbers. To kill or not to kill. That is the question. Q.Q2
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Asus announced their AM5 board X670E Extreme. The E already stands for Extreme, which makes it an Extreme Extreme.
My feeling is that AM5 will be extremely - expensive!
That's because the AM5 LGA socket moves cost from the CPU (formerly PGA) to the mobo, but AMD certainly won't drop CPU prices, rather the opposite, and then there's also DDR5 as cost driver, not to mention tons of PCIe 5.0 where we don't even have AIBs.
On the upside, that would finally end the days of GPUs causing a disproportionately large share of the system cost - if only because the rest gets more expensive.6 -
Fuck Apache TIKA.
Its supposed to be a "universal file reader" or some shit. Im trying to use it as a PDF/image parser that does OCR when needed and yelds a full-file string. It does so, but the text ends up being IN THE WRONG FUCKING ORDER.
WTF would I want to parse the text out of a PDF in any order that is not the one the text is supposed to be read?!?!
"It is more efficient to work in random ordering", says the docs. No shit, really? Wouldn't it be even more efficient to just spit out random strings? Just as useful and 100% CPU-bound.
"You can add a property to forcefully put the text in the right order". THEN WHY THE FUCK IT IS NOT THE DEFAULT SETTING?
Srsly, what's the use case to a parser that yields scrambled text?!?1 -
Here is a weird fact I have been thinking about this evening:
Helio X20 was the only mainstream ARM processor that had 10 CPU cores. It was first introduced in 2015, however no more ARM processors with high core count were used since then..
Nowadays smartphone processors have `8` cores max 🤔🧐
I guess 8 cores the reasonable limit for smartphones. Must have something to do with cost-to-performance factor5 -
hp /proc/cmdline
BOOT_IMAGE=/vmlinuz-5.15.0-27-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro nohsz_full=0-31 isolcpus=0-31 rcu_nocbs=0-31
dell /proc/cmdline
BOOT_IMAGE=/vmlinuz-5.15.0-27-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro nohsz_full=0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62 isolcpus=0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62 rcu_nocbs=0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62
gee, thanks for make that messy1 -
Windows 11 kinda defeated me (although probably by my own fault of installing it on unsupported hardware).
I’ve been having horrible input lag whenever my system has been doing something CPU intensive - gaming, even copying files, to the point where I would have 2 second delay between key input and key being registered by the system.
I reverted back to Windows 10.5 -
So Im planning to build a pc, which i will mainly use it for dev and gaming in free time, my main components will be:
CPU: INTEL 8700K
GPU: GTX 1080 msi or gigabyte?
SSD: 860 EVO
RAM: 16GB 3200MHZ
MOTHERBOARD: should i go with msi or gigabyte whixh one is better?
PSU: 650W or 700W deepcooler?
Also for the cpu cooler do i get water colling or a standard cpu fan?
P.S: i plan to overclock the cpu and gpu at some point.
Also whats your opinion on the rgb lightning gpu and motherboard, and is there point in getting a mobo with sli support (is it work buying second gpu at some point or better upgrade the existing)4 -
Why the fuck why are tslint and prettier are always sucking their dicks and fuck each others asses.
Do you know this moment when you think:.... 🤔 They have millions of downloads, why do I bother formatting my code so much. Mabye all this people are smarter and saving so much time.
Then you set up eslint and prettier adjusting 10000k rules just to find eslint and prettier five minutes later in one file fucking their asses again how to indent on save😠😱7 -
So....
Another machine not working till morning.
That's what happens when the engineer knows a bit how to operate the machines but doesn't have a grasp on how cutting tools work...
Replacing 60€ tools every 4 hours that should last a week is not profitable.
When so many tools are spent that there's no more in stock.
Also manufactor has cutting parameters for a reason... Making the tools work 3 times faster or deeper does not mean profit, means damaged machines and tools.
As comparison, think over clocking a cpu to 7000hz and pushing it to the max 24h a day...5 -
Question for Support:
What are the recommended system specifications for [X]. We have a client using a laptop with an [BEEFY-CPU] and 32 GB of RAM and your program hits 100% on both resources when this program is used.
Answer by Support:
Those specs look above our recommendations. Programs using 100% of computing availability is a good thing and it means that it is functioning correctly. Of course if they have a more powerful computer it will run faster, but I would say that they are well positioned.4 -
Follow-up to my exp with Travis CI: https://devrant.com/rants/5006826
As my allotted credits are set to expire on December 23, I sent a request for 25k monthly OSS credits to Travis support on December 18.
Mind you this is only half of the credits of their lowest subscription price and I didn't ask for extra CPU, so not much to ask.
While for the previous credit request, I got an answer within 24h, this request has gone unanswered for over 2 working days and I noticed it got labeled with "Priority: low" although I will be unable to continue my OSS work in 2 days.
Let's see whether they plan to really uphold their promise that "they will always support open-source" -
Had a dream about computers on earth mostly stopping working for no apparent reason, yes, again. But this time, they still work on Mars, so we go there, at least some of us. UAC-esque, Doom 3-ish aesthetics, but in a good way, no death and no darkness. No hell plot though, we’re all fine. Both earth and mars are equally semi-livable, but in different ways. For some reason, we can’t ship new CPUs to mars, and 775 pentium considered a good CPU. We use SQL and HDDs. Elon is also there, but he’s nothing, a peasant compared to other scientists and engineers who are a part of the exodus. I had some problems with food and shelter initially, but @netikras helped me2
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some call
- yo bro do you have some time ?
- quick cause I'm taking a dump
- I think I have been hacked, got black screen kernel panick, linux freeze seldomly I have to reboot, no internet connexion
- save your stuff and reinstall linux
- I don't have enough stockage to backup
- Then buy one and save, probably either OS is fcked up or you have some hdd problems
Time that it will take: ~30min to reinstall whole shit
Peace duration: ~2years
Later on the same day
aunt
- I can't log into windows
- Did you change the password ?
- Yes but it does not work anymore
* looking at shit
* logs successfully. Reason: interface changed after automatic update.
* wait.
* wait some more so fucking windows fucking starts
* Desktop is ugly as fck.
* Some stupid settings messed up (like high contrast set, black theme or so)
aunt (the same)
- I can't log into my (other) laptop either
* logs
* wait more more more
Guess what: automatic updaaaates. Freezes 100%cpu
* Being a very experienced user: wait before reboot because this suckass os will probably fail to boot otherwise
* Blackscreen with a percentage: Installing updates...
* reboots
* Blackscreen with a percentage: Installing updates continuing...
* finally boot (feels like a miracle windows succeeds lol)
* still slow
aunt now sleeps
* look at running process and install programs
* sees shits like camera recognition (vendor installed), candycrush
* occasionnaly get adds
time lost: 2h
peace duration: ~3month
FFS I am a dev, not a fucking trash lover
It is already pain to fix someone os, but windows is the cream of cream
It brings no ease of use for novice user
It is so insanely slow
It has stupid settings set up by default!!!!!!!! Who FFS wants candycrush and ads
The maj are so fcking hazardous. It is 2022 pretty much the same as 15y back then. Updates take fucking eternity. And needs reboot. and are not even finished!!!
I swear I am gonna stretch my ass and install linux and any fckin other toolsuite needed so they can use Micro$$ word, which is the only fucking usecase they need windows for in the first case anyway
I SO wish this OS would die
I mean, even more than safari8 -
*just a normal day*
kiki: *,*::before,*::after { filter: blur(40em) }
OH SHIT!
*bass boosted CPU cooler intensifies*
*flossing dance*10 -
Hey guys,
I was wondering what setup (especially laptop/tower) you would use for coding at work it you could chose freely (I know some of you can).
I like the Lenovo thinkpads and like to have at least 16gb of ram (32 are better) and some powerful cpu like an i7. Usb type c, power delivery and useful Linux driver support are must-have.
How about you?15 -
TL;DR I have to bump a Redis cluster from t3.medium to m6g.large just to get enough network bandwidth even though I have no need of the extra memory.
Debugged an interesting issue today.
I am adding Elasticache to a project to reduce strain on the single node postgres DB.
Deployed a Redis replication group with 2 shards, with multi-AZ replication for resilience.
Everything was going well. We arent caching that much atm so was barely using 100Mb of memory.
Suddenly, when our US region comes online, latency skyrockets and the logs are full of Jedis timeout errors.
Still no issue with memory or node CPU.
The cause? Arbitrary network bandwidth throttling by AWS. The app currently processes about 3,000 requests per second so we were exceeding Amazons random ass allowances which arent documented anywhere.1 -
Well this is in fact just me reminiscing, instead of telling anecdote.
My first PC was a pentium two, the cpu casing being those horizontal ones, and a big bulky monitor resting on top of it; all white. A white mouse, two white speakers (you know the ones). I was perhaps just about 6 years old, and I used it the first bunch of times to play Mortal Kombat, and Sega's Moto Racer 3, and watch animated disney movies but mostly mickey mouse on VCD. I guess my habits of gaming and binge watching started way too early.1