* [rcu] 0eb885afb20: -25.8% softirqs.RCU
@ 2014-08-21 13:50 Fengguang Wu
2014-08-23 16:35 ` Paul E. McKenney
0 siblings, 1 reply; 2+ messages in thread
From: Fengguang Wu @ 2014-08-21 13:50 UTC (permalink / raw)
To: Pranith Kumar; +Cc: Dave Hansen, Paul E. McKenney, LKML, lkp
Hi Pranith,
FYI, these changes look nice:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev
commit 0eb885afb20317016670c1c5dd3a436c91e1e910 ("rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads")
test case: lkp-a04/aim7/400-disk_rr
It's an in-memory aim7/disk_rr test.
lkp-a04 is an Atom micro server with 8G Memory.
5db6a289a3a0a69 0eb885afb20317016670c1c5d
--------------- -------------------------
150860 ± 1% -25.8% 111937 ± 1% TOTAL softirqs.RCU
2809 ± 1% -12.5% 2457 ± 1% TOTAL vmstat.system.cs
4202 ± 1% -6.9% 3911 ± 1% TOTAL vmstat.system.in
212421 ± 2% -7.7% 196035 ± 3% TOTAL time.involuntary_context_switches
vmstat.system.in
4300 ++-------------------------------------------------------------------+
| .*.. *.. .*.. * |
4250 *+ .*.. + .*. * *.. .. : |
4200 ++ *..*..*. *.. + *..*. : .. * : |
| * : .* : .* |
4150 ++ : .*..*. *. |
4100 ++ *. |
| |
4050 ++ |
4000 ++ |
| O O O O O |
3950 O+ O O O O O O O O O O |
3900 ++ O O O O |
| O |
3850 ++-------------------------O-----------------------------------O-----O
vmstat.system.cs
3000 ++-------------------------------------------------------------------+
| |
2900 ++ *.. |
*..*..*..*..*..*..*.. .. *..*..*..*..*.. .*.. .*.. |
2800 ++ * .*. *. .* |
| *..*..*. *. |
2700 ++ |
| |
2600 ++ |
| O O |
2500 O+ O O O O O O O O O O O |
| O O O O O |
2400 ++ O O O O
| O |
2300 ++-------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Fengguang
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [rcu] 0eb885afb20: -25.8% softirqs.RCU
2014-08-21 13:50 [rcu] 0eb885afb20: -25.8% softirqs.RCU Fengguang Wu
@ 2014-08-23 16:35 ` Paul E. McKenney
0 siblings, 0 replies; 2+ messages in thread
From: Paul E. McKenney @ 2014-08-23 16:35 UTC (permalink / raw)
To: Fengguang Wu; +Cc: Pranith Kumar, Dave Hansen, LKML, lkp
On Thu, Aug 21, 2014 at 09:50:35PM +0800, Fengguang Wu wrote:
> Hi Pranith,
>
> FYI, these changes look nice:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev
> commit 0eb885afb20317016670c1c5dd3a436c91e1e910 ("rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads")
>
> test case: lkp-a04/aim7/400-disk_rr
Good show, Pranith!!!
Thanx, Paul
> It's an in-memory aim7/disk_rr test.
> lkp-a04 is an Atom micro server with 8G Memory.
>
> 5db6a289a3a0a69 0eb885afb20317016670c1c5d
> --------------- -------------------------
> 150860 ± 1% -25.8% 111937 ± 1% TOTAL softirqs.RCU
> 2809 ± 1% -12.5% 2457 ± 1% TOTAL vmstat.system.cs
> 4202 ± 1% -6.9% 3911 ± 1% TOTAL vmstat.system.in
> 212421 ± 2% -7.7% 196035 ± 3% TOTAL time.involuntary_context_switches
>
> vmstat.system.in
>
> 4300 ++-------------------------------------------------------------------+
> | .*.. *.. .*.. * |
> 4250 *+ .*.. + .*. * *.. .. : |
> 4200 ++ *..*..*. *.. + *..*. : .. * : |
> | * : .* : .* |
> 4150 ++ : .*..*. *. |
> 4100 ++ *. |
> | |
> 4050 ++ |
> 4000 ++ |
> | O O O O O |
> 3950 O+ O O O O O O O O O O |
> 3900 ++ O O O O |
> | O |
> 3850 ++-------------------------O-----------------------------------O-----O
>
>
> vmstat.system.cs
>
> 3000 ++-------------------------------------------------------------------+
> | |
> 2900 ++ *.. |
> *..*..*..*..*..*..*.. .. *..*..*..*..*.. .*.. .*.. |
> 2800 ++ * .*. *. .* |
> | *..*..*. *. |
> 2700 ++ |
> | |
> 2600 ++ |
> | O O |
> 2500 O+ O O O O O O O O O O O |
> | O O O O O |
> 2400 ++ O O O O
> | O |
> 2300 ++-------------------------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
>
> Disclaimer:
> Results have been estimated based on internal Intel analysis and are provided
> for informational purposes only. Any difference in system hardware or software
> design or configuration may affect actual performance.
>
> Thanks,
> Fengguang
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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