Article View: net.arch
Article #2606Re: AT&T MIPS claim [really task-switching]
From: mash
Date: Tue, 17 Jun 1986 09:03
Date: Tue, 17 Jun 1986 09:03
32 lines
1873 bytes
1873 bytes
In article <217@njitcccc.UUCP> ken@njitcccc.UUCP (Kenneth Ng) writes:
>In article <506@mips.UUCP>, mash@mips.UUCP writes:
>> a) LDPCTX and SVPCTX aren't on the top 25 in usage of CPU time,
>> even in VMS Kernel mode. The top 25 instructions use 62% of the
>> total kernel time, and the smallest shown is REMQUE with 1.31%.
>> This was for multi-user workloads.
>Out of curiousity, what were the top 5 or so instructions and the
>percentage of cpu time used?
1) Instruction Distributions - Multi-user workload, VMS Kernel Mode
Frequency Order Time Order
% %
1 MOVL 10.21 MOVL 8.19
2 BEQL 5.59 MTPR 5.27
3 RSB 4.33 BBC 3.39
4 BNEQ 3.99 REI 3.29
5 MOVZWL 3.25 BSBW 3.08
2) Instruction Distributions - Multi-user workload, All Modes
Frequency Order Time Order
% %
1 MOVL 11.40 MOVC3 13.14
2 BEQL 5.85 CALLS 7.80
3 BNEQ 3.07 MOVL 6.60
4 MOVZBL 3.07 RET 4.07
5 BBS 2.77 MULF3 3.59
I won't attempt to summarize the paper; it's well worth reading.
--
-john mashey DISCLAIMER: <generic disclaimer, I speak for me only, etc>
UUCP: {decvax,ucbvax,ihnp4}!decwrl!mips!mash, DDD: 408-720-1700, x253
USPS: MIPS Computer Systems, 930 E. Arques, Sunnyvale, CA 94086
Technical Details
Message-ID:
<516@mips.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!decwrl!glacier!mips!mashReferences:
<577@scirtp.UUCP> <124@bakerst.UUCP> <583@scirtp.UUCP> <506@mips.UUCP> <217@njitcccc.UUCP>Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!decwrl!glacier!mips!mash From: mash@mips.UUCP Newsgroups: net.arch,net.micro.att Subject: Re: AT&T MIPS claim [really task-switching] Message-ID: <516@mips.UUCP> Date: Tue, 17-Jun-86 05:03:12 EDT Article-I.D.: mips.516 Posted: Tue Jun 17 05:03:12 1986 Date-Received: Thu, 19-Jun-86 07:57:35 EDT References: <577@scirtp.UUCP> <124@bakerst.UUCP> <583@scirtp.UUCP> <506@mips.UUCP> <217@njitcccc.UUCP> Reply-To: mash@mips.UUCP (John Mashey) Distribution: net Organization: MIPS Computer Systems, Sunnyvale, CA Lines: 32