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#1 2019-05-19 17:18:18

Huldalumi
Member
Registered: 2019-05-15
Posts: 9

spectre

hi
In the terminal I ran cat /proc/cpuinfo

I noticed a bug report

bugs        : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds

is this a known problem on a 32-bit system and what if anything can I do to fix this

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#2 2019-05-19 19:29:46

damo
....moderator....
Registered: 2015-08-20
Posts: 4,903

Re: spectre

Google "spectre meltdown", and enlighten yourself!

Yes, it is a known problem (and even appeared on mainstream media); and there are mitigations.

See also Linux 4.20 likely to bring a performance reduction of 20-40% on Intel


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#3 2019-05-19 22:24:23

hhh
Meep!
Registered: 2015-09-17
Posts: 7,687
Website

Re: spectre

420 has been known to do that, and not just on Intel.

monkey

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#4 2019-05-20 05:28:37

ohnonot
...again
Registered: 2015-09-29
Posts: 3,741
Website

Re: spectre

Archlinux The vanilla Linux kernel has not enabled the fixes by default.
I'm not saying they're completely harmless, but it's something that has way more relevance on big VM farms and other enterprise use cases, not on you typical single-user desktop.

Anyhoo, Huldalumi, do some websearching.

there's this script you can try to get a more comprehensive test (and maybe some explanation, too).

Last edited by ohnonot (2019-05-20 05:29:30)

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#5 2019-05-20 06:23:05

Huldalumi
Member
Registered: 2019-05-15
Posts: 9

Re: spectre

Thanks, everyone I now feel enlightened I had done a search but because I wrote specter meltdown it returned
Info
Your search returned no hits.
I have done some online research some of what I read I did not understand, but a late night of searching and reading by about three o'clock in the morning and I finally came to the conclusion I'll just have to live with it

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#6 2019-05-20 07:14:27

Jimbo_G
Member
From: France
Registered: 2017-05-12
Posts: 121

Re: spectre

hhh wrote:

420 has been known to do that, and not just on Intel.

monkey

I would have expected Linux 4.20 to be blazing fast...

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#7 2019-05-21 06:23:36

ohnonot
...again
Registered: 2015-09-29
Posts: 3,741
Website

Re: spectre

Jimbo_G wrote:

I would have expected Linux 4.20 to be blazing fast...

not if the spectre/meltdown mitigations are enabled (or at least one of those causes performance losses of up to 40%).

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#8 2019-05-21 07:37:49

iMBeCil
WAAAT?
From: Edrychwch o'ch cwmpas
Registered: 2015-09-29
Posts: 639

Re: spectre

hhh wrote:

420 has been known to do that, and not just on Intel.

monkey

Unrelated: I have noticed this '420' in various memes and jokes(?) ... it seems to be a USA thing, which I don't quite grasp. Care to explain, to a poor Croatian guy?


Postpone all your duties; if you die, you won't have to do them ..

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#9 2019-05-21 08:08:55

Huldalumi
Member
Registered: 2019-05-15
Posts: 9

Re: spectre

sorry no idea what 420 is I am in Finland

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#10 2019-05-21 08:13:59

Jimbo_G
Member
From: France
Registered: 2017-05-12
Posts: 121

Re: spectre

It's a common subject for memes, there's an article on (English) Wikipedia that'll tell you all you need to know.

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#11 2019-05-21 09:14:23

iMBeCil
WAAAT?
From: Edrychwch o'ch cwmpas
Registered: 2015-09-29
Posts: 639

Re: spectre

^Oh, I see  big_smile  big_smile  Thanks.

Should have googled it myself ... but somehow I thought googling '420' would be too vague. It wasn't.  big_smile

Last edited by iMBeCil (2019-05-21 09:15:17)


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