Phoronix reported some nasty slowdowns, around 20%, with MySQL, but closer to 0% slowdowns with a few games.
Ryzen CPUs (and maybe AMD processors in general) appear to not be affected.
This one looks nasty--it looks like speculatively-executed instructions don't get security checks. Someone on Twitter claims to have an exploit that lets them read kernel memory.
Posted by: Rick C at Thursday, January 04 2018 11:21 AM (h8yX6)
It's what's known as a side-channel attack; you can't directly read kernel memory, but with a lot of trickery you can deduce some of the contents.
Posted by: Pixy Misa at Thursday, January 04 2018 11:30 AM (PiXy!)
Is this why I can't reach my blog www.rishon-rishon.com ?
Seemed to work fine for me, so I'm guessing the answer is "no".
Posted by: Rick C at Friday, January 05 2018 05:34 AM (h8yX6)
David got in touch with me yesterday and I hit it with a wrench couple of times.
Posted by: Pixy Misa at Friday, January 05 2018 08:40 AM (PiXy!)
So is there any talk about what sort of "universal effects" this has had on PCs in general?
Posted by: Wonderduck at Friday, January 12 2018 11:03 AM (h8yX6)
The effects for most users will be minimal, but it can be pretty bad if you:
(a) Make heavy use of virtual machines
(b) Do heavy random I/O - databases are about the only thing that really does this.
Games are about 1% slower. Most desktop apps will be affected even less than that.
Cloud servers are badly affected. One multi-user game went offline when Amazon patch their servers because the load basically doubled for the same number of players.
I do know one developer who returned his brand new Intel 8700K system and replaced it with a cheaper AMD Ryzen 1700 machine (which is what I have) and got much better performance. (AMD isn't affected by Meltdown, and is partly safe from the other bug, Spectre.)
Posted by: Pixy Misa at Saturday, January 13 2018 08:35 PM (PiXy!)
"databases are about the only thing that really does this."
Yeah, since that's my day job, I'm looking forward to that.
Posted by: Rick C at Sunday, January 14 2018 04:07 AM (h8yX6)
Not only is the Recent Comments widget broken, but the Edit Comments screen comes up blank.
Posted by: Mauser at Monday, January 15 2018 01:52 PM (h8yX6)
It's rather pretty. The script is dumb, but then The Fifth Element's script was extremely dumb and that was great.
The problems are the lead actor, who is dull as dishwater, and the utter lack of any sense of humour. Fifth Element excelled in both.
The action set-pieces are well done and the environments are great, but the moment it slows down you realise there is no there there.
If, like me, you are in the mood for something pretty and have a 99¢ Google Play movie rental handy, worth a shot, but otherwise entirely missable.
Also, nitpick, but - the City is seven hundred million miles from Earth? That's closer than Saturn. It's not much further away than Perth.
Update: Watched the last interminable forty minutes. The best part of the movie was Rihanna as the shape-changing alien dancer Bubble. She should have been the male lead. Seriously, that would have been an amazing film.
"the utter lack of any sense of humour."
What are you talking about? The way the female lead kept calling her counterpart stupid was hilarious!
Posted by: Rick C at Saturday, December 30 2017 02:49 AM (h8yX6)
"Also, nitpick, but - the City is seven hundred million miles from Earth? That's closer than Saturn. It's not much further away than Perth."
I noticed that myself, but given that the City originated in Earth orbit and was moved away when it became a hazard to Earth itself, that kind of makes sense.
Posted by: Ed Hering at Saturday, December 30 2017 03:49 AM (h8yX6)
I get a ton of email from Amazon because we use AWS at work, so they get routed to a separate folder that I don't always look at straight away.
Sometimes that's a mistake. Today it was two mistakes, one confusing, one delightful.
Got an email Christmas morning,
It was labeled Amazon.
It was typed in Times New Roman,
Said my package, it was gone.
Back for return and refund,
And I'd get a check real soon.
But I don't know what they're talkin' about
Got it Friday afternoon.
The other one someone knows about, and a huge Christmas thank you to that someone. Really brightened up my day.
I was planning to do a server migration last weekend, but the new server died.
So it got pushed back until basically the last minute before the old server was set to get cancelled on Thursday - and then on Thursday Akismet, the spam filtering service provided by Wordpress, basically dropped dead. Don't know what's up with that, but it took out not only all commenting on mu.nu and mee.nu, but also the old server itself due to a huge backlog of requests (it was taking forever for Akismet to eventually time out).
This happened while I was migrating the server, and since everything was in flux I had no idea what, specifically, had gone wrong.
The remaining issues were due to an upgrade from MySQL 5.0 to 5.7, which by default runs in strict mode and didn't like some old, sloppy SQL queries and definitions; a couple of places where I'd specified canonical server names (whatever.mu.nu) instead of functional names (bloghost.mu.nu), and a proxy configuration error that meant the real IP address wasn't getting passed through to Minx.
And that meant, because Akismet is rejecting all my API requests, that every commenter was treated as having the same IP address, which was banned.
Working on the recent comments and search functions now. I had to disable recent comments because MySQL 5.7 can't properly evaluate the query (it takes a minute and a half for something that used to take milliseconds). I'm not sure yet what happened to search.
On a related note, the MySQL query optimiser doesn't seem to improve over time. They just move the bugs around.
Update: I think Akismet didn't actually go down, they just changed something that we were depending on. They probably sent me an email six months ago...