> After the printa I think you need a > trunc. > > trunc(@a); > > Shouldn`t your output be > pid, tid, time in seconds ? > is this output post processed ? > > what does the original output look like ? > rick > > PS > I would think timestamp/nanosec would be subject to > rounding errors. > > > On Thu, Jul 15, 2010 at 01:49:05PM -0700, tester > wrote: > > X-CAA-SPAM: N00000 > > X-Authority-Analysis: v=1.1 > cv=C5hH5D9sZx7oBLYfm9Qeni98yGeIDIO6Mit34naBfEk= > > c=1 sm=1 a=Rf9Kass9ZIkA:10 a=ood2b7iyd8MA:10 > a=mMDRw7eodGMA:10 > > a=kj9zAlcOel0A:10 a=zRG8QCroJ/deLx9kZ5Uhsg==:17 > a=ep_KMAzDAAAA:8 > > a=Dc4nqrrUMXSxFipiTD0A:9 > a=jCEtMmcRhls7fIlIBkU65qnZ4ocA:4 > > a=CjuIK1q_8ugA:10 a=RD1bzJOsQUcA:10 > a=TC1Ce7_l9HwA:10 > > a=t6jm5M9rnSlXE7un:21 a=1GJxXsc5shYW460U:21 > > a=zRG8QCroJ/deLx9kZ5Uhsg==:117 > > X-Spam-Checker-Version: SpamAssassin 3.3.1 > (2010-03-16) on > > lv-drc6.opensolaris.org > > X-Spam-Level: > > X-Spam-Status: No, score=-1.0 required=5.0 > tests=AWL,BAYES_00,FREEMAIL_FROM, > > RDNS_NONE,T_TO_NO_BRKTS_FREEMAIL autolearn=no > version=3.3.1 > > X-Original-To: dtrace-discuss@opensolaris.org > > Delivered-To: dtrace-discuss@opensolaris.org > > Date: Thu, 15 Jul 2010 13:49:05 PDT > > From: tester <solaris.ident...@gmail.com> > > To: dtrace-discuss@opensolaris.org > > Subject: [dtrace-discuss] precision thread CPU > usage > > X-BeenThere: dtrace-discuss@opensolaris.org > > X-Mailman-Version: 2.1.13 > > Precedence: list > > List-Id: DTrace General Discussion > <dtrace-discuss.opensolaris.org> > > List-Unsubscribe: > > > <http://mail.opensolaris.org/mailman/options/dtrace-d > iscuss>, > > > <mailto:dtrace-discuss-requ...@opensolaris.org?subjec > t=unsubscribe> > > List-Archive: > <http://mail.opensolaris.org/pipermail/dtrace-discuss> > > List-Post: <mailto:dtrace-discuss@opensolaris.org> > > List-Help: > <mailto:dtrace-discuss-requ...@opensolaris.org?subject > =help> > > List-Subscribe: > > > <http://mail.opensolaris.org/mailman/listinfo/dtrace- > discuss>, > > > <mailto:dtrace-discuss-requ...@opensolaris.org?subjec > t=subscribe> > > Errors-To: dtrace-discuss-boun...@opensolaris.org > > > > Hi, > > > > I am trying to figure out accurate thread CPU > utilization using the sched provider. When I sample > for 5 seconds and multiply by the number of CPU > threads, the reported seconds exceeds 5s X number of > CPU threads. > > > > sched:::on-cpu > > /self->ts == 0/ > > { > > self->ts = timestamp/nanosec; > > } > > > > sched:::off-cpu > > /self->ts != 0/ > > { > > > > @a[pid,tid] = sum((timestamp/nanosec) - > self->ts); > > self->ts = 0; > > > > } > > > > tick-5s { > > > > trunc(@a,10); > > printa(@a); > > > > } > > > > ===================== > > Here is the output > > > > 3-------------1----------3 > > 1982----------165-------3 > > 6039----------52571---3 > > 12110---------6006-----6 > > 1982----------25785---8 > > 1982----------25930--8 > > 12110---------5996-----9 > > 6039----------52902----12 > > 11359----------3006-----14 > > 0-------------0----------4751 > > > > The total of the above exceeds 5X256 (T5440 with > 256CPU threads). Any ideas? > > > > Thanks > > -- > > This message posted from opensolaris.org > > _______________________________________________ > > dtrace-discuss mailing list > > dtrace-discuss@opensolaris.org > > -- > > Rickey C. Weisner > Software Development and Performance Specialist > Principal Software Engineer > Systems Quality Office > Oracle Corporation > cell phone: 615-308-1147 > email: rick.weis...@oracle.com > _______________________________________________ > dtrace-discuss mailing list > dtrace-discuss@opensolaris.org >
Rick, That was it, I was missing the last trunc. I feel so dumb. The o/p I showed earlier is pid, tid and seconds. Thanks for pointing the rounding errors also. Thanks -- This message posted from opensolaris.org _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
