On Sat, Dec 27, 2025 at 05:36:50PM +0900, Akira Yokosawa wrote:
> Hi Paul,
>
> Here is a small set of patches for December.
>
> Patch 1/5 is another routine update of rcu-test.dat
> Patch 2/5 mediates longer run time of RCU related litmus tests under
> kltimus7 by exclude those tests from default list of tests.
> Patch 3/5 works around a strict policy on ghostscript (gs) under Ubuntu
> 25.10's apparmor.
> Patches 4/5 and 5/5 are obvious fixes to your recent updates in toyrcu.
>
> As for Patch 2/5, klitmus7 converts synchronize_rcu() into
> synchronize_rcu_expedited() by default ever since herdtools7 7.45
> released in 2017. So, the longer time to run suggests decreasing
> trend in "throughput of synchronize_rcu_expedited()".
> Have you done any benchmark on such a thing/concept?
>
> Thanks, Akira
Queued and pushed, thank you!
I clearly was not doing well when I added that \co{} to toyrcu! Thank you
for fixing that and for converting the list.
On synchronize_rcu_expedited(), my usual runs focus on functionality
and further just check synchronize_rcu(), and I have not set up anything
to check trends. I will run tests on various kernel versions. I will
be running this via rcuscale in a guest OS, initially on my laptop in
a preemptible kernel. Please let me know if there are any special
settings I should be using.
My first run on a recent kernel showed surprisingly long expedited grace
periods, enough to make me suspect that they are somehow being mapped
into normal grace periods. Ditto for v6.0. More later!
Thanx, Paul
> --
> Akira Yokosawa (5):
> CodeSamples/formal: Update rcu-test.dat for v6.18
> CodeSamples/formal/herd/Makefile: Add KLITMUS7_EXTRAOPTS variable
> Makefile: Let ghostscript access under /tmp
> toyrcu: Replace \co{} with \cref{}
> toyrcu: Mark inline enumerate list as such
>
> CodeSamples/formal/data/rcu-test.dat | 1 +
> CodeSamples/formal/herd/Makefile | 3 +-
> Makefile | 5 ++-
> a2ping-rule.mk | 40 +++++++++++++++++------
> appendix/toyrcu/toyrcu.tex | 13 +++++---
> epstopdf-rule.mk | 48 +++++++++++++++++++++-------
> 6 files changed, 83 insertions(+), 27 deletions(-)
>
>
> base-commit: f10ba2161229db12af9a1e38fd23850483721b7d
> --
> 2.43.0
>
