Re: [PATCH 3/3] nfsstat: Eliminate the displaying zero stats

[Steve Dickson <SteveD@redhat.com>]

Hey Bruce,

J. Bruce Fields wrote:
> On Wed, Apr 08, 2009 at 12:05:08PM -0400, Steve Dickson wrote:
>> Eliminate the displaying zero stats when the explicit protocol
>> is specified (-2, -3, -4) the -Z and or --list options.
>>     
>> When a particular protocol is specified and either
>> the -Z or --list options are used, zeros or blank lines
>> are echoed to the screen when there is not any NFS traffic.
>> This cause any useful data to be scroll off the screen.
> 
> Sound like good fixes.
> 
>>     
>> With this patch only non-zero stats will be shown, which
>> makes the output of these options more condensed and
>> in turn more useful.
> 
> Couldn't this make the output harder to parse?  E.g. if you want to know
> how many getattr's were sent each second, it might be simpler if you say
> a 0 those times when there were no getattrs.
> 
Maybe.. but if one was parsing the output and the parser didn't see a 
gettr stat, I'm assuming it would not increment the "gettr counter"
so it would be know there were zero gettars in that time period.. 

The main reason I did this was, when watching reads and writes, 90% of 
the output was zeros stats which made very difficult to see the non 
zero counts (i.e. read and write stats) since they generally got
scrolled of the screen... 

Also note, when the --list option is not used, zero stats are 
shown in the column output, but granted, the column output
is a bit harder to parse than the list output.

I guess I could change it so non zero stats are show only 
the --sleep option is *not* used....  

steved.