Meltdown & Spectre Information and Discussion

[rokytnji]

[quote author=rokytnji link=topic=4978.msg37703#msg37703 date=1515153114]
If you wanna do a quick check on your own. Just for piece of mind I guess.

Code:

dd if=/dev/zero of=/tmp/testfile bs=512 count=5000000

<use sudo in Linux Lite>

RESULT
-Ultra-slim-Desktop:~$ sudo dd if=/dev/zero of=/tmp/testfile bs=512 count=5000000
[sudo] password for linuxlite:
5000000+0 records in
5000000+0 records out
2560000000 bytes (2.6 GB, 2.4 GiB) copied, 21.1723 s, 121 MB/s
-Ultra-slim-Desktop:~$


So what does this mean in the scheme of things please?
[/quote]

For starters. Simple answer. 121 MB/s is OK and means no memory leak.

I have been busy changing kernels in my gear and using patched kernels from Debian and AntiX to make the point of this thread moot in my case usage.

Like on this IBM T23 Laptop that Linux Lite won't run on. Due to age of gear and hardware limitations. Posting this reply in Netsurf browser. No Java or Flashplayer Plugin touches this laptop.

Code:

harry@biker:~
$ inxi -M
Machine:   Device: laptop System: IBM product: 26474MU serial: N/A
           Mobo: IBM model: 26474MU serial: N/A
           BIOS: IBM v: 1AET64WW (1.20 ) date: 10/18/2006
harry@biker:~
$ inxi -f
CPU:       Single core Mobile Intel Pentium III - M (-UP-) cache: 512 KB
           CPU Flags: cmov cx8 de eagerfpu fpu fxsr mca mce mmx msr mtrr pae pge pse
           pse36 sep sse tsc vme
harry@biker:~
$ uname -a
Linux biker 4.9.75-antix.2-486-smp #2 SMP Tue Jan 9 15:22:47 EST 2018 i686 GNU/Linux
harry@biker:~
$

Ubuntu will make this thread moot also when their patched kernels are available also.

Your gear is untouched from what I can tell from your readout. I'll run that command on my IBM T23 Laptop. Which is way way slower and weaker than your gear. It uses a intel cpu also though.

Code:

# dd if=/dev/zero of=/tmp/testfile bs=512 count=5000000
5000000+0 records in
5000000+0 records out
2560000000 bytes (2.6 GB, 2.4 GiB) copied, 68.3041 s, 37.5 MB/s

as you can tell from my readout I gave as a comparison. Mine is fine also for the age of this gear. If I got something like 5 MB/s. Then I'd worry. If it took like 10 mintues to copy. That would concern me also. s