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--- Comment From jhop...@us.ibm.com 2017-08-24 12:41 EDT---
(In reply to comment #15)
> The fixes were applied to zesty/master-next branch and will be available on
> the next kernel SRU cycle.
>
> I removed the verification-done-zesty tag because it must be added only
> after the fixes have been tested with a kernel that's at least in -proposed.
> So the verification will need to be done again when the next SRU kernel hits
> -proposed (a comment will be added when that happens).

Oops sorry, got too excited about verification ;)  Thanks for the info.

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Title:
  RPT related fixes missing in Ubuntu 16.04.3

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--- Comment From jhop...@us.ibm.com 2017-08-15 12:06 EDT---
Thanks! Seeing good improvements with this build based on some unixbench 
microbenchmarks:

baseline = 4.10.0-32-generic
RPT fixes = 4.10.0-32.36~lp1709220

Unixbench baseline RPT fixesimprovement
SMToff  SMT4SMToff  SMT4SMToff  SMT4
Execl ? single   656.2   963.0  1583.0  1507.1  141.2%  56.5%
Execl ? multi   2522.9  6527.3  4720.2 11766.7   87.1%  80.3%
Sysexec ? single 487.2   715.5   787.0  1082.2   61.5%  51.3%
Sysexec ? multi 1783.0  4845.2  2738.6  8029.3   53.6%  65.7%
Spawn ? single  1645.0  2546.8  2632.9  3168.8   60.1%  24.4%
Spawn ? multi   5877.5 17688.8  8459.9 23650.1   43.9%  33.7%

Note this was on a 4core DD1 system running at 1.6GHz.

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Title:
  RPT related fixes missing in Ubuntu 16.04.3

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--- Comment From jhop...@us.ibm.com 2017-08-10 10:41 EDT---
Aneesh has additional Radix performance fixes (3 more total):

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=424de9c6e3f89399fc11afc1f53f89c5329132da
("powerpc/mm/radix: Avoid flushing the PWC on every flush_tlb_range")
.
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a46cc7a90fd8d95bfbb2b27080efe872a1a51db4
("powerpc/mm/radix: Improve TLB/PWC flushes")
.
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5ce5fe14ed0302315061cf97ce67accd1b25b938
("powerpc/mm/radix: Improve _tlbiel_pid to be usable for PWC flushes")

(upstream, currently scheduled for 4.14)

Can these be included in Zesty as well?

FYI the first set of 3 patches mentioned in the orig bug report helps
anywhere from 40% up to 3.5X on unixbench fork/exec testcases. I will
post updated numbers for this second set of 3 fixes soon.

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Title:
  RPT related fixes missing in Ubuntu 16.04.3

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--- Comment From bren...@br.ibm.com 2017-08-08 15:30 EDT---
So, this bug is basically a request to include 
a5998fcb92552a18713b6aa5c146aa400e4d75ee into Ubuntu Zesty (4.10) kernel, 
correct?

--- Comment From jhop...@us.ibm.com 2017-08-08 15:36 EDT---
(In reply to comment #6)
> So, this bug is basically a request to include
> a5998fcb92552a18713b6aa5c146aa400e4d75ee into Ubuntu Zesty (4.10) kernel,
> correct?

Yep! would like this fix for the 16.04.3 hwe 4.10 kernel

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Title:
  RPT related fixes missing in ubintu 16.04.3

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--- Comment From jhop...@us.ibm.com 2017-08-08 11:39 EDT---
(In reply to comment #4)
Looking at the "Ubuntu-hwe-4.10.0-30.34_16.04.1" branch, it appears the first 
two are included:

> commitf7327e0ba3805470cced2acfa053e795362ee41d
> powerpc/mm/radix: Remove unnecessary ptesync
commit 2da0c6d3eb566166126b7a4180ac2a10729ae034
Author: Aneesh Kumar K.V 
Date:   Mon Apr 10 10:23:46 2017 -0300

UBUNTU: SAUCE: powerpc/mm/radix: Remove unnecessary ptesync
BugLink: https://bugs.launchpad.net/bugs/1681429

>
> commitf6b0df55cad252fedd60aa2ba75a0207d0006283
> powerpc/mm/radix: Don't do page walk cache flush when doing full mm flush
>
commit ea856a8baccee7dd3fd9fd37a37cd688d534a0b6
Author: Aneesh Kumar K.V 
Date:   Mon Apr 10 10:23:45 2017 -0300

UBUNTU: SAUCE: powerpc/mm/radix: Don't do page walk cache flush when doing full 
mm flush
BugLink: https://bugs.launchpad.net/bugs/1681429

** But this one is missing:

> commita5998fcb92552a18713b6aa5c146aa400e4d75ee
> powerpc/mm/radix: Optimise tlbiel flush all case

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  RPT related fixes missing in ubintu 16.04.3

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