[dtrace-discuss] How do I unroll an aggregation?

[Adam Leventhal]

Hi Ian,

The best way is probably to use a different aggregation for each of the
columns (e.g. @io_r and @io_w) and then use printa with multiple
aggregations. This feature was introduces in snv_30 and should be in the
next update to Solaris 10.

Check out this thread from 2005:
  http://www.opensolaris.org/jive/thread.jspa?messageID=13704&#13704

Adam

On Wed, Jan 31, 2007 at 12:28:33PM -0500, Ian Matchett wrote:
> How do I unroll an aggregation?
> 
> I want to printout  @Io[R,], at Io[W,] , @Size[R,], at Size[W,] and 
> @Time[R,], at Time[W,] all on the same line.
> 1 line per file that I am monitoring?
> 
> How do I unroll the values out of the aggregation?
> 
> {
> 
> self->rw="R"
> or
> self->rw="W";
> 
> self->vpath="/full/path/name/to/file/*";
> 
>         @Size[self->rw, self->vpath]=sum( self->size );
>         @Io[self->rw, self->vpath]=count();
>         @Time[self->rw, self->vpath]=avg( timestamp-self->start );
> }
> 
> 
> 
> profile:::tick-TIMEsec
> {
> normalize( @Size, (1024 * TIME ));
> normalize( @Io, TIME );
> normalize( @Time, 1000);
> printf("  r/s    w/s   kr/s   kw/s wait actv wsvc_t asvc_t  w  b device\n");
> printa(    @Size );
> printa(    @Io );
> printa(    @Time );
> clear(     @Size );
> clear(     @Io );
> clear(     @Time );
> 
> }
> 
> -- 
> Ian Matchett Sun Microsystems
> Burlington MA 01803 USA
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-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl