From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10334 invoked by alias); 28 Feb 2006 20:04:16 -0000 Received: (qmail 10324 invoked by uid 22791); 28 Feb 2006 20:04:16 -0000 X-Spam-Status: No, hits=-2.5 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (66.187.233.31) by sourceware.org (qpsmtpd/0.31) with ESMTP; Tue, 28 Feb 2006 20:04:15 +0000 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id k1SK4DxX001382 for ; Tue, 28 Feb 2006 15:04:13 -0500 Received: from pobox.corp.redhat.com (pobox.corp.redhat.com [172.16.52.156]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id k1SK4D129792 for ; Tue, 28 Feb 2006 15:04:13 -0500 Received: from vpn83-169.boston.redhat.com (vpn83-169.boston.redhat.com [172.16.83.169]) by pobox.corp.redhat.com (8.12.8/8.12.8) with ESMTP id k1SK4Bfp011769; Tue, 28 Feb 2006 15:04:11 -0500 Subject: Re: Systemtap benchmarking doc draft From: Martin Hunt To: William Cohen Cc: SystemTAP In-Reply-To: <440369D1.6030705@redhat.com> References: <440369D1.6030705@redhat.com> Content-Type: text/plain Organization: Red Hat Inc. Date: Tue, 28 Feb 2006 20:04:00 -0000 Message-Id: <1141157050.3404.13.camel@dragon> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-3.fc4) Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2006-q1/txt/msg00660.txt.bz2 On Mon, 2006-02-27 at 16:06 -0500, William Cohen wrote: > SystemTap Language micro metrics (costs of various operations): > cost of associative array operations transport speed (both maximum and writing to disk) transport overhead (how much cpu time it takes) printf overhead probe overhead (all the stuff the translator emits for each probe) stack dump/trace symbolic lookup systemtap function call overhead systemtap string operations (things like concatenation do many string copies and are slow) > Kernel instrumentation limits: > Number of probes that can be registered at a time > Number of kretprobes active > > SystemTap limits: > Maximum elements in associative array This is a define. Probably needs to be a variable. Anyway, it is adjustable. > Number of actions/steps in probe. Ditto Martin