From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jack Steiner Date: Fri, 11 Nov 2005 00:24:06 +0000 Subject: Re: [Patch 1/1] 4-level page tables v4. Message-Id: <20051111002406.GB3767@sgi.com> List-Id: References: <20051110161915.GA3630@lnx-holt.americas.sgi.com> In-Reply-To: <20051110161915.GA3630@lnx-holt.americas.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Thu, Nov 10, 2005 at 04:13:02PM -0800, Chen, Kenneth W wrote: > Robin Holt wrote on Thursday, November 10, 2005 2:39 PM > > I am going to attach the dispersal analysis the modified objdump that > > Jack has produced. > > > 5c: 8 S cmp.eq p6,p7=5,r17 > > 60: 8 [MII] nop.m 0x0 > > 66: 8 shr.u r18=r22,36;; > > Hmm, I think the dispersal analysis software is buggy. At least for > the above instance. Immediate form of shr is pseudo-op'ed to extr. > It should count the above bundle with 2 cycles instead of one cycle. Very possible. The tool is very old & non-supported. We have used it several times and had good luck. It seems to point out ares of code that stall unexpectedlt. Eliminating the stalls usually improved performance. However, I would be surprised if there were no bugs in the code. I would like to see a standard tool that gives dispersal analysis. There was a discussion on the IA64 list ~ month ago but so far, no takers. > > - Ken > > - > To unsubscribe from this list: send the line "unsubscribe linux-ia64" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Thanks Jack Steiner (steiner@sgi.com) 651-683-5302 Principal Engineer SGI - Silicon Graphics, Inc.