Jerky scrolling in Chrome, FF, Brave, VimB

[Philip Rhoades via users]

People,

I have had a reasonably powerful PC for the last few Fedora versions:

  i7-7700K CPU @ 4.20GHz 8 core
  32GB RAM
  40GB Swap
  50% free on 4TB Seagate drive

and even though the PC seems unloaded according to Glances eg:

  < 40% CPU loading
  < 80 RAM used
  ~ 1% Swap used
  - Disk IO minimal

I still have problems using the up / down cursor keys, PgUp / PgDn keys, 
mouse wheel for moving around on web pages - there is usually a second 
or more delay and then a jump . .


Admittedly I do tend to load up the browsers with multiple windows and 
tabs but if the system still seems unloaded, why is there the jerkiness?


Prior versions of Fedora were XFCE4, current F34 is Wayland and Sway but 
the problem has been there over multiple versions . .


Thanks,

Phil.
--
Philip Rhoades

PO Box 896
Cowra  NSW  2794
Australia
E-mail:  p...@pricom.com.au
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[Off Topic] Re: Debugging USB device issues

[Joe Zeff]

On 10/28/21 11:59 AM, George N. White III wrote:

Now I encounter confusion when I ask that  posts in scientific forums
copy and paste text from the "terminal" into a post because their screen
snapshot is difficult to read and cuts off critical information at the end
of a long line.


BTDT.  Once, when I was doing tech support for a company selling 
security equipment to self-storage facilities I started a tempest in a 
teapot because a brain fart made me forget the term multimeter and I 
referred to it in my notes as a VOM.  Later, I almost caused another one 
by calling a power light a pilot light but caught myself in time.


When I was doing support for an ISP, I reluctantly referred to folders 
because that's what the callers understood, but if we had to go to a 
CLI, I'd call them directories, explaining that it was the proper term 
in that environment.

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Re: Debugging USB device issues

[George N. White III]

On Thu, 28 Oct 2021 at 03:05, Joe Zeff  wrote:

> On 10/27/21 10:10 PM, Tim via users wrote:
> > I could argue that it's not a terminal.  Old enough computer guys will
> > tell you what a terminal really is.  :-p
>
> The first computer I ever programmed was an IBM 1620 Mod 2 back in '68.
>   Does that make me an old enough computer guy?
>

In '68 I was using a teletype terminal with paper tape to store programs.

Now I encounter confusion when I ask that  posts in scientific forums
copy and paste text from the "terminal" into a post because their screen
snapshot is difficult to read and cuts off critical information at the end
of a long line.

-- 
George N. White III
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Re: partially invisible back-up DVD.

[Barry Scott]

> On 28 Oct 2021, at 05:36, Ed Greshko  wrote:
> 
> On 28/10/2021 12:14, Tim via users wrote:
>> On Thu, 2021-10-28 at 06:54 +0800, Ed Greshko wrote:
>>> Still a USB thumb drive is much better
>>> and more reliable than optical storage.
>> I'm more confident the other way around.
>>  
> 
> Maybe I'm one of the few lucky ones?  I have 2 thumb drives of 128GB from 
> SanDisk I've used for 2~3 years
> with no issues.  An 8GB one from Transcend that I've had for about 5 years.  
> And a non-name one that I don't recall
> how old it is but has no issues.

The key information you need for flash memory devices is the ENDURANCE which is 
the amount of
data that can be written to the device before it fails. It is typically quoted 
in TBW - Terabytes Written.

There is a standard for measuring the figure for various work loads.

I think it is JESD218 which there is an overview  of at

https://www.jedec.org/standards-documents/focus/flash/solid-state-drives 


but the specs are behind a paywall now. (Used to be free to download).

The standard is interesting, but not required reading you will pleased to know.

There are two workloads that are often quoted in spec sheets.
The client workload - meaning a typical office worker workload.
The server workload - meaning a server workload.

There is also a random workload, but its is rare to see that quoted as the life 
times are very short.

Personal I will not buy an SSD or memory stick that does not publish its 
JESD218 client workload figures.

As examples I've quickly found specs for samsung and SanDisk.

On 
https://www.samsung.com/uk/memory-storage/nvme-ssd/970-evo-plus-nvme-m-2-ssd-1tb-mz-v7s1t0bw/
 

find endurance on the page. It tells you that the drive 1200TBW.

Then figures for SanDisk SSD's are here 
https://kb.sandisk.com/app/answers/detail/a_id/23603/~/ssd-endurance 

and you can compare these figures, the best is 600TBW.

FYI the last SSD I got was a Intel part and its had 1000TBW+ Endurance.

> 
> I've replaced the optical drive in my Tower 3 times since 2008 and have media 
> written on previous drives be
> unreadable on the replacement drive.  The optical drive in my Asus laptop 
> died a few years ago and I decided
> not to replace it.
> 
> I also have multiple SSD from Crucial that have power on hours of at least 4 
> years with 0 NAND blocks
> being reallocated.

power-on-hours and reallocations are interesing, but its the endurance you need 
to predict life time.
Assuming you can calculate a figure the amount of data that you write your 
device.

> 
> But, when it comes to backups, I have much more confidence in my RAID enabled 
> NAS and rsync.  :-)

I back to a file server from all my hosts, then copy off the backups and put 
that copy off site.

All use Fedora of course.

Barry


> 
> --
> On Facebook it is called Vaguebooking.
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Re: Debugging USB device issues

[Samuel Sieb]

On 2021-10-28 00:56, Tim via users wrote:

Tim:

I've noticed things turn up in dmesg that don't turn up in
/var/log/messages


Samuel Sieb:

/var/log/messages is legacy, I don't even have that file on my
computer.


I know, but I do, on purpose.  Because:


   "journalctl" will show you everything.


Is a right bastard to deal with.  Quite apart from having to remember
new options for a new command, as opposed to just reading a text
file, I find that it's got to trawl through a behemoth of data to come
up with results.  To call it sluggish would be an understatement.  It's
overkill for most things, and as fun to use as working out regex
parameters.


Maybe spend a little time figuring it out.  It's amazingly useful once 
you start to understand it.  I don't find it sluggish at all, but maybe 
that's because I use SSDs.

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Re: Debugging USB device issues

[Tim via users]

Tim:
>> I've noticed things turn up in dmesg that don't turn up in
>> /var/log/messages

Samuel Sieb:
> /var/log/messages is legacy, I don't even have that file on my
> computer. 

I know, but I do, on purpose.  Because:

>   "journalctl" will show you everything.

Is a right bastard to deal with.  Quite apart from having to remember
new options for a new command, as opposed to just reading a text
file, I find that it's got to trawl through a behemoth of data to come
up with results.  To call it sluggish would be an understatement.  It's
overkill for most things, and as fun to use as working out regex
parameters.

-- 
 
uname -rsvp
Linux 3.10.0-1160.45.1.el7.x86_64 #1 SMP Wed Oct 13 17:20:51 UTC 2021 x86_64
 
Boilerplate:  All unexpected mail to my mailbox is automatically deleted.
I will only get to see the messages that are posted to the mailing list.
 
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