Re: [PATCH] proc: Add workaround for idle/iowait decreasing problem.

2013-08-06 Thread Frederic Weisbecker
On Tue, Jul 02, 2013 at 07:39:08PM +0900, Fernando Luis Vazquez Cao wrote: > On 2013年07月02日 12:56, Fernando Luis Vazquez Cao wrote: > >Hi Frederic, > > > >I'm sorry it's taken me so long to respond; I got sidetracked for > >a while. Comments follow below. > > > >On 2013/04/28 09:49, Frederic Weisbe

Re: [PATCH] proc: Add workaround for idle/iowait decreasing problem.

2013-08-06 Thread Frederic Weisbecker
On Tue, Jul 02, 2013 at 12:56:04PM +0900, Fernando Luis Vazquez Cao wrote: > Hi Frederic, > > I'm sorry it's taken me so long to respond; I got sidetracked for > a while. Comments follow below. > > On 2013/04/28 09:49, Frederic Weisbecker wrote: > >On Tue, Apr 23, 2013 at 09:45:23PM +0900, Tetsuo

Re: [PATCH] proc: Add workaround for idle/iowait decreasing problem.

2013-07-02 Thread Fernando Luis Vazquez Cao
On 2013年07月02日 12:56, Fernando Luis Vazquez Cao wrote: Hi Frederic, I'm sorry it's taken me so long to respond; I got sidetracked for a while. Comments follow below. On 2013/04/28 09:49, Frederic Weisbecker wrote: On Tue, Apr 23, 2013 at 09:45:23PM +0900, Tetsuo Handa wrote: CONFIG_NO_HZ=y ca

Re: [PATCH] proc: Add workaround for idle/iowait decreasing problem.

2013-07-01 Thread Fernando Luis Vazquez Cao
Hi Frederic, I'm sorry it's taken me so long to respond; I got sidetracked for a while. Comments follow below. On 2013/04/28 09:49, Frederic Weisbecker wrote: On Tue, Apr 23, 2013 at 09:45:23PM +0900, Tetsuo Handa wrote: CONFIG_NO_HZ=y can cause idle/iowait values to decrease. [...] It's not

Re: [PATCH] proc: Add workaround for idle/iowait decreasing problem.

2013-04-27 Thread Frederic Weisbecker
On Tue, Apr 23, 2013 at 09:45:23PM +0900, Tetsuo Handa wrote: > CONFIG_NO_HZ=y can cause idle/iowait values to decrease. > > If /proc/stat is monitored with a short interval (e.g. 1 or 2 secs) using > sysstat package, sar reports bogus %idle/iowait values because sar expects > that idle/iowait val

[PATCH] proc: Add workaround for idle/iowait decreasing problem.

2013-04-23 Thread Tetsuo Handa
CONFIG_NO_HZ=y can cause idle/iowait values to decrease. If /proc/stat is monitored with a short interval (e.g. 1 or 2 secs) using sysstat package, sar reports bogus %idle/iowait values because sar expects that idle/iowait values do not decrease unless wraparound happens. This patch makes idle/io