Indonesia Site Analysis for PS Throughput Decrease After MPU Modification

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Indonesia Site Analysis for PSthroughput Decrease after MPUmodification

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Indonesia Site Analysis for PS throughput Decrease after

MPU modification About This Document

About This Document

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1544!5

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MPU modification *ontents

Contents

About This Document......................................................................iii

1 Basic Information.......................................................................11

! Problem Description...................................................................!1

" Problem Analysis......................................................................."1

# $oot Cause................................................................................#"

% Corrective Action.......................................................................%1

5,1 Suggestion,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,5$1

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1 Basic InformationProduct Name &ersion

0S*&!! &!!2!136*!!SP(55#


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! Problem DescriptionThe customer found that PS throughput of Se/eral ode0s decrease after MPU modification after 1# thDec,


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" Problem Analysis"1' 7rom the PS throughput statistic- ode0s of )hich PS throughput decreased from #1thDec are added in

Subrac8 4,


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3 Problem Analysis 2oot *ause Analysis for 999

"#' 7rom the :PT log- the subrac8 4 and slot 1# DPUe board )as bound to MPU 4;4;!,

The table belo) sho)s that relation among MPU


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MPU modification 5 *orrecti/e Action

The principle of control plane resource and the user plane resource allocation is; the MPU )ill prefer to assignthe control plane resource to SPU )hich is controlled by it and user plane resource to DPU )hich is controlled byit, :nly if the *PU load of the SPU subsystem is o/er the control plane sharing threshold or DSP load is o/er the

user plane sharing- MPU )ill share the ne) ser/ice to other MPU to process,

The table belo) sho)s that relation bet)een


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3 Problem Analysis 2oot *ause Analysis for 999

@e found that the all sites in subrac8 4 are controlled by MPU 4;!;!- so the user plane resource )as assigned

to subrac8 4 slot 13 DPU, In this case- the DSPs of subrac8 4 slot 13 )ere o/erload and cause the PS throughputdecreased,

The code 2222MPU.#2M!411 sho)ed that MPU share the ser/ice to other MPU by DSP load,

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MPU modification 5 *orrecti/e Action

# $oot CauseAll ode0s )ere controlled in the MPU 4;!;! in subrac8 4, After the subrac8 4 and slot 1# DPUe board)as bound to MPU 4;4;! on #1th Dec- all ser/ice )as assigned the subrac8 4 and slot 13 DPUe board andcaused the all DSPs )ere high loaded, To ensure admission of *S ser/ices and ?uality of ongoing *S

ser/ices- the 2* lo)ers the rates of 0 ser/ices )hen the *PU of a DSP is hea/ily loaded, In this case- the

PS throughput decrease after operation,

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% Corrective Action%.1 'u((estion10ind ode0s on the 1B% subsystem on the sunbrac8 4 slot 4 SPUb board,

#*hec8 the DSP state after MPU modification operation,

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Indonesia Site Analysis for PS Throughput Decrease After MPU Modification