linux-kernel - Re: [PATCH tip/core/rcu 1/5] rcu: Update rcutorture defaults

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Message-ID: <20120830185704.GB6749@jtriplet-mobl1>
Date:	Thu, 30 Aug 2012 11:57:05 -0700
From:	Josh Triplett <josh@...htriplett.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	fweisbec@...il.com, sbw@....edu, patches@...aro.org,
	"Paul E. McKenney" <paul.mckenney@...aro.org>
Subject: Re: [PATCH tip/core/rcu 1/5] rcu: Update rcutorture defaults

On Thu, Aug 30, 2012 at 11:45:08AM -0700, Paul E. McKenney wrote:
> From: "Paul E. McKenney" <paul.mckenney@...aro.org>
> 
> A number of new features have been added to rcutorture over the years, but
> the defaults have not been updated to include them.  This commit therefore
> turns on a couple of them that have proven helpful and trustworthy, namely
> periodic progress reports and testing of NO_HZ.
> 
> Signed-off-by: Paul E. McKenney <paul.mckenney@...aro.org>
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> ---
>  kernel/rcutorture.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
> index 25b1503..86315d3 100644
> --- a/kernel/rcutorture.c
> +++ b/kernel/rcutorture.c
> @@ -53,10 +53,10 @@ MODULE_AUTHOR("Paul E. McKenney <paulmck@...ibm.com> and Josh Triplett <josh@fre
>  
>  static int nreaders = -1;	/* # reader threads, defaults to 2*ncpus */
>  static int nfakewriters = 4;	/* # fake writer threads */
> -static int stat_interval;	/* Interval between stats, in seconds. */
> +static int stat_interval = 60;	/* Interval between stats, in seconds. */
>  				/*  Defaults to "only at end of test". */

Need to remove this comment about the default.

>  static bool verbose;		/* Print more debug info. */
> -static bool test_no_idle_hz;	/* Test RCU's support for tickless idle CPUs. */
> +static bool test_no_idle_hz = 1; /* Test RCU support for tickless idle CPUs. */

s/1/true/

>  static int shuffle_interval = 3; /* Interval between shuffles (in sec)*/
>  static int stutter = 5;		/* Start/stop testing interval (in sec) */
>  static int irqreader = 1;	/* RCU readers from irq (timers). */
> -- 
> 1.7.8
> 
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