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iPhone update for Meltdown-Spectre: before/after performance benchmarks

melv1n.com

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Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#41

Post by ponchoalv »

bluedino wrote: post #17

>> a significant decrease in performance on the iPhone 6 up to 50% Something's up. I updated my 6S yesterday and have noticed zero in performance changes or battery loss. Still plenty of bugs though, I was reading an email and the 'flag/file/trash/reply/new' bar totally went away. At least the touchscreen hasn't gone unresponsive, causing me to have to hit sleep/wake to toggle it back on. Maybe they finally fixed tha…

same behaivor here... no perfomance / battery hit.

Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#45

Post by jasonlotito »

rconti wrote: post #6

Why does Cloudflare tell me I'm able to browse a snapshot while the site is offline, but there is no snapshot?

I've never known Cloudflare to do things well. It's the last CDN I'd want to use.

Edit: For example, the 502 page is showing, but supposedly, you are supposed to see the site based on this: "However, because the site uses Cloudflare's Always Online™ technology you can continue to surf a snapshot of the site."

Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#46

Post by Pfhortune »

rconti wrote: post #6

Why does Cloudflare tell me I'm able to browse a snapshot while the site is offline, but there is no snapshot?

This is because, humorously, the snapshot is actually of the 502 page. Apparently Cloudflare kicked in too late.

Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#47

Post by stcredzero »

brador wrote: post #24

Is this a "bug" we can recover from (in future hardware or software) or are we going to collectively take a lifetime -18 hit to our Moore's Law progress and lose the gains from this technique forever?

I'd like a new computer architecture, where communication between different parts of software systems was more explicitly treated as communication. Instead of an exception to pass control to the kernel, how about sending data? Instead of multiple CPU communication through memory (and therefore the cache) how about sending data?

Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#48

Post by rmcpherson »

ucha wrote: post #34

I just ran GeekBench 4 on my iPhone X on iOS 11.2.2 vs 11.2.1. Single core: 4239 vs 4241 Multi-core: 10081 to 10203 So no difference.

I wonder what the difference is between the 6 used in the benchmark in the article and the iPhone X that would cause these different results. They both support speculative execution.

Either way, encouraging results to a fellow iPhone X user.

Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#49

Post by jasonlotito »

marcc wrote: post #42
fancyfacebook wrote: post #33

I keep getting bad gateway from some awful CDN, is there an alternative link?

That's Cloudflare and it's not sending the bad gateway, it's telling you that the upstream (the OP server) is returning a bad gateway.

Except Cloudflare is saying this: "However, because the site uses Cloudflare's Always Online™ technology you can continue to surf a snapshot of the site"

It shouldn't be telling you that the host is failing.

Re: iPhone update for Meltdown-Spectre: before/after performance benchmarks

#50

Post by toomuchtodo »

perfmode wrote: post #30
euph0ria wrote: post #14

I wonder how much extra revenue this will bring to AWS/GCP etc selling more instances to cover the performance loss on servers?

It's energy providers that will win the most.

All major cloud providers are buying renewables for their operations. Yay?

At least the additional renewable generation capacity built out will exist for decades (while processors should become more efficient as these security issues are addressed and new hardware rolls out).

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