I agree. I don't think you can readily deduce the potential absolute CPU
capacity impact from the SIIS % number. That's no doubt why IBM gave general
guidance on how serious you should consider the problem rather than saying "oh
this is costing you this many CPU seconds/MSUs//MIPS". My recommend
A previous poster wrote:
> siis% is number of instructions that suffered SIIS in a given period
But I wonder about this. The percentage in "SIIS percentage" technically isn't
a percentage of instructions, but rather percentage regarding the source of L1
i-cache directory writes. Looking at how
Dump 70,72,113 from every system on the z server
Run the following build: MYIN is FB 80
%LET MACKEEP= MACRO _XLA113 _XLA113F % ;
%UTILBLDP(BUILDPDB=NO,USERADD=7072 113,
OUTFILE=MYIN,
WANTSMF=70.1 113.1,
INCLAFTR=ASUM70PR ASUM113);
I will be using SAS MXG . I am fine with representing it in MSUs . But how
should i derive it. Will it be siis%
of the lpar total MSUs used in that interval?
On Fri, 5 May 2023 at 2:50 PM, Andreas von Imhof <
02ba5d449f94-dmarc-requ...@listserv.ua.edu> wrote:
> Using type 30's is not my 1st c
Using type 30's is not my 1st choice. Need to calculate capture ratio's,
preferably by workload type. Cannot remember if DB2 type enclaves are captured
here or it is all lumped into DB AS.
I think that Shivang wants a total view. The document from John Burg spells it
out quite clearly.
eg page
Where is the problem ?
siis% is number of instructions that suffered SIIS in a given period
MIPS is number of instructions per second
you have cpu-seconds used in a given period or the number of
instructions executed in that given period
you don't want us do the math for you, or?
Martin
I am not looking to know how to calculate siis% from smf113 . I am looking
for how to convert SIIS% in terms of MSUs or MIPS.
On Fri, 5 May 2023 at 2:33 PM, Martin Trübner <
047eec287bd9-dmarc-requ...@listserv.ua.edu> wrote:
> the May 2022 update has the numbers you are looking for
>
> Am 04.
the May 2022 update has the numbers you are looking for
Am 04.05.23 um 23:46 schrieb shivang sharma:
Hi ,
Every IBM document discribes this as % . I am trying to get the SIIS% value
in terms of MIPS or MSUs
On Fri, 5 May 2023 at 1:49 AM, Sri h Kolusu wrote:
Shivang,
Check these links.
h
>>Every IBM document discribes this as % . I am trying to get the SIIS% value
>>in terms of MIPS or MSUs
Shivang,
Did you look at SMF30COUNT ? If it is set, you can get address space MSU
consumptions.
Alternatively, you can covert the CPU seconds(SMF30) to MSUs and MIPS
https://www.longpelaex
Hi ,
Every IBM document discribes this as % . I am trying to get the SIIS% value
in terms of MIPS or MSUs
On Fri, 5 May 2023 at 1:49 AM, Sri h Kolusu wrote:
> Shivang,
>
> Check these links.
>
>
> https://www.ibm.com/support/pages/identifying-%E2%80%-instruction-stream%E2%80%9D-siis-inefficien
Shivang,
Check these links.
https://www.ibm.com/support/pages/identifying-%E2%80%9Cstore-instruction-stream%E2%80%9D-siis-inefficiency-using-cpu-mf-counters
https://www.ibm.com/support/pages/system/files/inline-files/CPUMF_Implementation_Details.pdf
Thanks,
Kolusu
-
Hi All ,
SMF113 provides metrics to calculate siis% . At one customer shop we have
been asked to provide estimated SIIS MSUs or MIPS . Can somebody point me
an easy way to derive this.
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