Neale,

I will have z15 with Linux on Z in production next year.

Do you know when that will be part of standard Red Hat Linux on Z?
I hope java will also leverage this.

Thanks in advance!

Michel Beaulieu
IBM Services (Canada)
________________________________
From: Linux on 390 Port <[email protected]> on behalf of Neale Ferguson 
<[email protected]>
Sent: December 20, 2019 2:42 AM
To: [email protected] <[email protected]>
Subject: Compression

I gave the instructions at 
https://linux-on-z.blogspot.com/2019/10/howto-exploiting-hardware-compression.html
 to exercise the hardware compression and it certainly gives things a boost:

Without –

$ time python test.py
7.23user 0.33system 0:07.57elapsed 99%CPU (0avgtext+0avgdata 
1278228maxresident)k

With (the new .so was in my cwd) –

$ LD_LIBRARY_PATH=$PWD time python test.py
1.49user 0.27system 0:01.77elapsed 99%CPU (0avgtext+0avgdata 
1282176maxresident)k

One issue I did have during the build was that __STDC_VERSION__ wasn’t defined 
so I had to do it manually via -D

Neale Ferguson


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