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Simple HPCPI Session Using Labels
In the following session, the user associates the label myLabel with the performance data for a
single process, myApp. This example also uses the label with hpcpiprof to extract performance
data for myApp, including data for routines called by myApp from a shared library.
The following HPCPI session shows the commands for using HPCPI with labels. The steps are
numbered and described in the sections that follow.
% module load hpcpi #1 Set up & run hpcpid
% setenv HPCPIDB /tmp/hpcpidb # (continued)
% mkdir -p $HPCPIDB # (continued)
% hpcpid # (continued)
% hpcpictl label myLabel ./myApp #2 Create the label & run the app
% hpcpictl flush #3 Flush the data
% hpcpiprof -label myLabel #4 Use the label with hpcpiprof
% hpcpiprof -label myLabel libm-2.3.4.so
% hpcpictl quit #5 Stop the HPCPI daemon
Step 1: Setting Up the Environment and Starting the Daemon
To set up the HPCPI path, database and start the daemon, as described in “Simple HPCPI Session”
(page 31), enter the following commands:
% module load hpcpi
% setenv HPCPIDB my_directory
% mkdir -p $HPCPIDB
% hpcpid
Step 2: Establishing the Label and Running the Application
The hpcpictl label command establishes a label and runs the specified binary. By default,
HPCPI associates all performance data for the process with the specified label. The label is active
until the process terminates.
To establish the label myLabel, run myApp, and associate all data for that process with myLabel,
enter the following commands:
% hpcpictl label myLabel ./myApp
Step 3: Flushing the Data
To flush the HPCPI data to disk after the application completes, enter the following command:
% hpcpictl flush
This ensures the HPCPI data is written to disk and visible to the HPCPI analysis tools.
Step 4: Using the Label with hpcpiprof
The hpcpiprof utility supports the -label label_name option to isolate data associated
with a label. When you enter the hpcpiprof command without an image name, it displays
per-image statistics for all images on the system. The image with the most CPU cycles used is
typically the kernel (vmlinux-2.6.9-34.7hp.XCsmp), as shown in the following example
from a lightly loaded system:
% hpcpiprof
Event Name Events Period Samples
---------- ------------- ------ ---------
CPU_CYCLES 7969037220000 60000 132817287
CPU_CYCLES % cum% image
---------- ----- ------ ----------------------------
385649e7 48.4% 48.4% vmlinux-2.6.9-34.7hp.XCsmp
198708e7 24.9% 73.3% libm-2.3.4.so
192510e7 24.2% 97.5% myApp
60 Using HPCPI Labels
- HP Part Number: 5992-4009 1
- Published: March 2008 1
- Edition: 1 1
- Table of Contents 3
- 4 Table of Contents 4
- Table of Contents 5 5
- 6 Table of Contents 6
- Table of Contents 7 7
- 8 Table of Contents 8
- List of Figures 9
- List of Tables 11
- About This Document 13
- Related Information 14
- Publishing History 14
- HP Encourages Your Comments 15
- 1 Introduction 17
- 18 Introduction 18
- 22 Introduction 22
- 2 Installing HPCPI and Xtools 25
- Installing the Software 26
- Installing the Software 27 27
- Installing the Software 29 29
- Verifying the Installation 30
- Removing the Software 30
- 3 Getting Started with HPCPI 31
- 32 Getting Started with HPCPI 32
- 4 Using HPCPI 35
- Starting the hpcpid Daemon 36
- Selecting Events to Monitor 37
- Commonly Used Event Sets 38
- Event Duty Qualifier 39
- Labeling Data 40
- 42 Using HPCPI 42
- Default Input Data 43
- Flushing Data: hpcpictl flush 43
- HPCPI Header 44
- HPCPI Procedure Header 46
- 48 Using HPCPI 48
- 50 Using HPCPI 50
- HPCPI Utility Options 51
- Specifying Events to Display 52
- Selecting Data by Label 52
- Displaying Raw Values 53
- Limiting the hpcpiprof Output 54
- Additional Options 54
- Using Event Sets 55
- Event Intervals 56
- Multiple Duty Groups 56
- Itanium Instruction Metrics 57
- 5 Using HPCPI Labels 59
- Step 3: Flushing the Data 60
- Label Selectors 62
- -not Operator 63
- -and Operator 63
- -or Operator 63
- -equiv Operator 63
- Operator Syntax 63
- Multiple Labels 64
- Reusing Labels 64
- Comparing Epochs and Labels 64
- Label Examples 65
- Kernel Idle Data: -pid 0 66
- Creating Labels in Programs 67
- Fortran Code Example 68
- Overview 69
- % setenv HPCPIDB ~/hpcpidb 70
- % mkdir -p $HPCPIDB 70
- % hpcpid -create-epoch 70
- Submitting the Job 71
- Collecting Data on One Node 73
- 7 Using Xtools 75
- Xtools Overview 76
- Using xclus and xcxclus 76
- Using xclus and xcxclus 77 77
- Starting xclus and xcxclus 78
- Starting xclus and xcxclus 79 79
- 80 Using Xtools 80
- 82 Using Xtools 82
- 84 Using Xtools 84
- 86 Using Xtools 86
- Recording Data 89
- Replaying Data 89
- Plotting Data 89
- 90 Using Xtools 90
- Viewing Grouped Nodes 92
- Using xperf and xcxperf 94
- Starting xperf and xcxperf 94
- Instructions 96
- Sum I/O B/W 97
- 98 Using Xtools 98
- HTn (HyperTransport Links) 100
- 102 Using Xtools 102
- 106 Using Xtools 106
- 108 Using Xtools 108
- % xclus -generic 109
- % xcxclus -enhanced -apmond 110
- Xtools Daemons 111
- A Product Specifications 113
- 114 Product Specifications 114
- HPCPI Product Limitations 115
- Calls to exec() 116
- Unknown Locations 116
- Mandated Duty Groups 116
- Active Fraction Changes 116
- B HPCPI Quick Reference 117
- Viewing HPCPI Data 118
- C Xtools Quick Reference 119
- Starting xperf or xcxperf 121
- Glossary 123
- 124 Glossary 124
- 126 Index 126
- 128 Index 128
- 130 Index 130
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