Introduccin a VTune Analizador de rendimiento Intel Software

Introducción a VTune™ Analizador de rendimiento Intel Software College

Objetivo Al término de este módulo será capaz de: • Entender el propósito y modelos soportados por el analizador de rendimiento Vtune™ • Identificar “hotspots” explorando a través de las muestras tomadas. • Entender como funciona el muestreo • Usar “callgraph profiling” para encontrar “hotspots” Basics of VTune™ Performance Analyzer 2 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Agenda ¿Qué es el analizador de rendimiento VTune™? Conceptos de afinación del rendimiento Usando el colector de muestras Como funciona el muestreo Muestreando a través del tiempo Gráfico de llamadas Basics of VTune™ Performance Analyzer 3 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador de rendimiento VTune™ Ayuda a identificar y caracterizar problemas de rendimiento por medio de: • Recolectar datos sobre el rendimiento del sistema que está ejecutando la aplicación. • Organizar y desplegar los datos en una variedad de vistas interactivas, desde todo el sistema hasta el código fuente o la perspectiva de instrucción del procesador. • Identificar problemas de rendimiento potenciales y sugerir mejoras. Basics of VTune™ Performance Analyzer 4 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Ambientes soportados Recolección de datos locales y remotos Perfilar aplicaciones que están ejecutándose en el sistema que tienen el analizador instalado, o Ejecutar experimentos en otros sistemas qué están ejecutando agentes remotos del analizador VTune Basics of VTune™ Performance Analyzer 5 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Análisis de rendimiento local Procesadores Intel® IA-32 • • Sistema Operativo Microsoft Windows* Linux Procesadores de la familia Itanium® • • Sistema Operativo Microsoft Windows Linux Basics of VTune™ Performance Analyzer 6 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Ambiente Anfitrión/Destino VTune™ soporta recolección de datos remotos VTune™ instalado en el sistema anfitrión Agente remoto instalado en el sistema destino Sistema Destino Sistema Anfitrión • Familia de procesadores IA-32 o Itanium® • Sistema Operativo Windows* • Controla el sistema destino • Muestra los resultados de la recolección de datos Conexión LAN • Windows o Linux* • Intel® PXA 2 xx procesadores ejecutando Windows CE* Basics of VTune™ Performance Analyzer 7 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Características Muestreo Gráfico de llamadas a funciones (call graph) Basics of VTune™ Performance Analyzer 8 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Características del analizador VTune™ y modelos de su utilización El muestreo obtiene datos del rendimiento de todo el sistema Basics of VTune™ Performance Analyzer 9 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Características del analizador VTune™ y modelos de su utilización El muestreo sobre el tiempo muestra como los datos del muestreo cambian a través del tiempo Basics of VTune™ Performance Analyzer 10 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Características del analizador VTune™ y modelos de su utilización Muestreando el código fuente con datos del rendimiento Basics of VTune™ Performance Analyzer 11 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Características del analizador VTune™ y modelos de su utilización El gráfico de llamadas obtiene y muestra información sobre el flujo del programa en la aplicación Basics of VTune™ Performance Analyzer 12 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

¿Qué es un Hotspot? Es donde en una aplicación donde hay una cantidad significativa de trabajo • Donde = dirección en memoria => Proceso SO => Hilo SO => archivo ejecutable o módulo => función de usuario (requiere símbolos) => línea de código fuente (requiere símbolos con números de línea) o instrucción del procesador (ensamblador) • Significativa = actividad que ocurre frecuentemente, probablemente no tiene mucho impacto en el rendimiento del sistema • Actividad = tiempo gastado en otros eventos internos del procesador • Ejemplos de otros eventos: fallos de caché, fallos en la predicción de saltos, instrucciones de punto flotante retiradas, etc. Basics of VTune™ Performance Analyzer 13 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Muestreo: El método estadístico para encontrar los Hotspots El colector de muestras • Periódicamente interrumpe el procesador • • Basado en tiempo Basado en eventos: Activado por la ocurrencia de cierto número de eventos de la microarquitectura • Recolecta el contexto de ejecución • • • Dirección de ejecución en memoria (CS: IP) Identificador del proceso en el sistema operativo e hilo Módulo ejecutable cargado en esa dirección • Si hay símbolos para el módulo, el post-procesamiento puede identificar la función o método en la dirección de memoria. • Los números de línea del archivo de símbolos pueden direccionarte a la línea relevante del código fuente. Basics of VTune™ Performance Analyzer 14 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Recolector de muestras Periódicamente interrumpe el procesador para obtener el contexto de ejecución • Muestreo basado en tiempo (TBS) se activa por: • • Servicios del timer del sistema operativo Cada n ciclos de reloj del procesador • Muestreo basado en eventos (EBS) se activa por eventos del procesador • Estos eventos son específicos del procesador, como fallos en la caché L 2, fallos en la predicción de saltos, instrucciones de punto flotante retiradas, etc. Basics of VTune™ Performance Analyzer 15 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Resultados de muestras por proceso del Sistema Operativo Este proceso del sistema operativo tiene la mayor cantidad de muestras de ciclos de reloj Or cic den los ado de po re r loj Basics of VTune™ Performance Analyzer 16 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Presiona aquí para ver en el tiempo. Presiona aquí para ver los procesos del SO Muestra solo la muestra de datos de ciclos de reloj. Basics of VTune™ Performance Analyzer 17 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Presiona aquí para separar por CPU Esta gráfica fue filtrada seleccionando solo un elemento de la gráfica de procesos Basics of VTune™ Performance Analyzer 18 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Vista de Tabla: Seleccionar Resumen de la línea señalada en la tabla. Basics of VTune™ Performance Analyzer 19 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Vista del Hotspot de un módulo para todos los procesos e hilos del SO agrupados por función (o método). Basics of VTune™ Performance Analyzer 20 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Basics of VTune™ Performance Analyzer 21 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Totales por Linea Fuente Presiona aquí para Ver código desensamblado Actividad en Localidades de Instrucciones Basics of VTune™ Performance Analyzer 22 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Analizador VTune™ Recolector de muestras Acercar Alejar Totals for Source Line Activity at Instruction Locations Seleccionar Evento Intervalos de tiempo en rojo tienen más muestras Basics of VTune™ Performance Analyzer 23 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Actividad 1: Encontrar el Hotspot Aprender como identificar hotspots con el analizador VTune™. Basics of VTune™ Performance Analyzer 24 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Tres Beneficios Claves del Muestreo No es necesario modificar código. • Pero compila/encadena con símbolos y números de línea. • Haz ejecutables finales (release) con optimizaciones. El muestreo es muy amplio en cuanto a sistemas. • No solo NUESTRA aplicación. • Puede verse actividad en el código del sistema operativo incluyendo drivers. La sobrecarga por muestrear es muy baja. • La validez es mayor cuando la perturbación es baja. • La sobrecarga puede reducirse aún más quitando el progreso la interfaz de usuario. ¿De qué otra forma puede reducirse la sobrecarga del muestreo? Basics of VTune™ Performance Analyzer 25 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Como Funciona el Muestreo Basado en Eventos (EBS) Diagrama Conceptual Selecciona Señal del Evento Cuenta Decreciente Número “Muestrea Después” Underflow a Cero Interrumpe CPU para Tomar Muestra Controlador Interno de Interrupciones§ Como seleccionar un número “Muestreo Después” Basics of VTune™ Performance Analyzer 26 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

¿Cuántas Muestras Son Suficientes? ¿Un millón de muestras por una ejecución de 5 segundos? • ¿Se tienen suficientes muestras para ser estadísiticamente significativas? • ¿Cuánta sobre carga se está causando? ¿Qué si solo se obtienen 100 muestras? • ¿Qué sucede si se muestrea después de un evento? • ¿Se está obteniendo un buen perfil? Aproximadamente 1, 000 muestras por segundo es un buen balance entre significativo y sobrecarga Basics of VTune™ Performance Analyzer 27 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Objetivo: 1, 000 Muestras Por Segundo ¿Cuál es la muestra después de valor por ciclo de reloj? • Depende de la velocidad del reloj de CPU • RESPUESTA: La velocidad de reloj del CPU en KHz • • Si la velocidad de reloj del CPU = 1, 400, 000 Hz Muestrear después de 1, 400, 000 ciclos ¿Qué es la muestra después de un valor de fallos de caché L 2? • Depende en que tan frecuente hay un fallo en la caché L 2 • ¿Definición circular? ¿No es lo que se está tratando de determinar? • Haz una estimación inteligente • • ¿Más o menos frecuente que los ciclos de reloj? ¿ 10 veces? ¿ 1000 veces? Basics of VTune™ Performance Analyzer 28 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Calibración Establecer el muestreo después de un valor para obtener un número de muestras razonable. • ~1000 muestras por segundo por CPU lógico Requieres que la carga de trabajo sea ejecutada dos veces Calibración Manual: • Quita la marca de Calibrate Sample After • Encontrada en el diálogo Advanced Activity Configuration • Inicia con el valor por default o una estimación • Ejecuta una prueba • Modifica la muestra después del valor y vuelve a probar • Trata de obtener aproximadamente 1000 muestras por segundo por CPU lógico Basics of VTune™ Performance Analyzer 29 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Muestreo a Través del Tiempo Muestra como distribuciones de las muestras cambian a través del tiempo por proceso, hilo, o módulo Acercamiento en regiones de tiempo Útil para: • Identificar características de rendimiento variables en el tiempo • Entender el comportamiento de los hilos Basics of VTune™ Performance Analyzer 30 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Muestreo Sobre el Tiempo Colecta los datos del muestreo Selecciona elementos de interés desde el proceso, hilo o módulos Presiona Selecciona la región de interés Presiona para ver histograma del proceso/hilo/direcciones para una región de tiempo Basics of VTune™ Performance Analyzer 31 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Actividad 2: Muestreo en el Tiempo Aprender como usar la vista de Muestreo Sobre el Tiempo Basics of VTune™ Performance Analyzer 32 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Perfil de Gráfico de Llamadas Rastrea la entrada de la función y puntos de salida del código durante la ejecución Usa instrumentación binaria Usas esos datos para determinar el flujo del programa, funciones críticas y secuencias de llamadas a subrutinas No cualquier sistema: Solo perfila códigos en la ruta de llamadas de la aplicación en Ring 3 Basics of VTune™ Performance Analyzer 33 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

¿Qué se puede perfilar? Aplicaciones Win 32 Stand-alone Win 32* DLLs Stand-alone COM+ DLLs Aplicaciones Java Aplicaciones. NET* Aplicaciones ASP. NET Aplicaciones Linux 32* Basics of VTune™ Performance Analyzer 34 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Vista del Gráfico de Llamadas Las líneas rojas muestran la ruta crítica. La ruta crítica es la ruta de llamadas que más tiempo consume. Basada en el parámetro “self time”. Filtrado por “self time” Los nodos en naranja indican funciones con el mayor “self time”. Basics of VTune™ Performance Analyzer 35 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Ventana del Gáfico de Llamadas Usa la ventana de navegación del gráfico para ver el gráfico de llamadas completo. Basics of VTune™ Performance Analyzer 36 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Gráfico de Llamadas Vista de Llamadas Aquí Intercambia entre lista de llamadas y vista del gráfico de llamadas. Basics of VTune™ Performance Analyzer 37 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Métricas del Gráfico de Llamadas (Call Graph) Métrica de Rendimiento Descripción Self Time Tiempo total en una función, excluyendo el tiempo gastado en sus hijos (incluye tiempo de espera) Total Time Tiempo medido desde que inicia una función hasta que sale de la función Total Wait Time Tiempo gastado en una función y su hijo cuando el hilo se bloquea Wait Time Tiempo gastado en una función cuando el hilo se bloquea (excluye el tiempo bloqueado en su hijo) Calls Número de veces que se llama la función Basics of VTune™ Performance Analyzer 38 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Actividad 3: Gráfico de Llamadas Encuentra el hotspot en el programa gzip usando el gráfico de llamadas. Basics of VTune™ Performance Analyzer 39 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Muestreo Versus Gráfico de Llamadas Muestreo Gráfico de Llamadas Menor Sobrecarga Mayor Sobrecarga Todo el Sistema En el árbol de llamadas de la aplicación solo Ring 3 Histograma de direcciones de todo el sistema Muestra nivel de jerarquía de funciones contadores de llamadas, tiempos y ruta crítica Para niveles de detalles de función, debe tener información de debug Debe re-encadenar con el parámetro /fixed: no, no hace la instrumentación de manera automática El muestreo puede basarse en el tiempo y otros eventos del procesador Los resultados se basan en el tiempo. Basics of VTune™ Performance Analyzer 40 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Aplicaciones Java* y. NET* Proveen datos de rendimiento para código administrado y código no administrado Da una idea de cómo llamadas de código administrado se traducen en llamadas Win 32 * Usa API de perfiles de código administrado e instrumentación binaria Basics of VTune™ Performance Analyzer 41 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Lo Básico del Analizador de Rendimiento VTune™ Lo Qué se ha Cubierto Se pueden usar los diferentes perfiladores en el analizador Vtune para entender diferentes aspectos del rendimiento de una aplicación. Basics of VTune™ Performance Analyzer 42 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Basics of VTune™ Performance Analyzer 43 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Diapositivas Adicionales

VTune™ Analyzer Features and Usage Models Counter Monitor Tracks Operating System Counters Over Time Basics of VTune™ Performance Analyzer 45 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

VTune™ Analyzer Features and Usage Models The Tuning Assistant Provides Tuning Advice Based on Performance Data Basics of VTune™ Performance Analyzer 46 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Intel® Tuning Assistant Identifies bottlenecks in: • Pentium® 4, Pentium M®, Itanium® 2, and Pentium® III processors. Uses EBS and Counter Monitor data. Shows scaling differences between different runs. Code Coach is still available but is not enabled by default. Basics of VTune™ Performance Analyzer 47 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Intel® Tuning Assistant Basics of VTune™ Performance Analyzer 48 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Intel® Tuning Assistant VTune™ analyzer automatically selects events in the Sampling wizard. Basics of VTune™ Performance Analyzer 49 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Intel® Tuning Assistant For more detail, click hyperlink. Basics of VTune™ Performance Analyzer 50 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Lab Activity 3: Getting Tuning Advice Learn how to get processor-specific tuning advice Basics of VTune™ Performance Analyzer 51 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Windows* Command Line Interface Collect sampling data from the command line. Useful for integrating performance data collection into your automated regression testing. View the data in the VTune™ Performance Analyzer or export as ASCII text. Invoke by typing “vtl” at the command line. Basics of VTune™ Performance Analyzer 52 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Windows* Command Line Interface Creates hidden project structure To create an activity: vtl create [activity name] + options To run an activity: vtl run [activity name] To view activities type: vtl show To view results of a particular activity type: vtl view [activityname: : result] [options] To delete the entire project: vtl delete –all To delete a specific activity: vtl delete <activity name> Basics of VTune™ Performance Analyzer 53 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Windows* Command Line Interface Examples Sample on clockticks and instructions retired and launch app matrix. exe: vtl activity a 1 –c sampling –app matrix. exe run See the clocktick hotspots in matrix. exe: vtl view a 1: : r 1 –hf –mn matrix. exe See the number of samples in each module system wide: vtl a 1: : r 1 view –modules Basics of VTune™ Performance Analyzer 54 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Windows* Command Line Interface Help For general command line arguments: vtl –help For sampling command line arguments and events: vtl –help –c sampling For in depth help and examples go to: Start->Programs>Intel® VTune™ Performance Analyzer->Help for the Command Line Basics of VTune™ Performance Analyzer 55 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Lab Activity 4: Using the Windows* Command Line Interface Learn how to collect sampling data from the command line Basics of VTune™ Performance Analyzer 56 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Call Graph Advanced Configuration Set instrumentation levels. • Helps control overhead Select which functions are instrumented. • Helps control overhead Basics of VTune™ Performance Analyzer 57 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Call Graph Advanced Options This is the instrumented module status grid. Click here to set module instrumentation levels. Basics of VTune™ Performance Analyzer 58 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Instrumentation Levels Instrumentation Level Description Debug Info Required? All Functions Every function in the module is instrumented. Yes Custom You can specify which functions are instrumented Yes Export Every function in the module’s export table is instrumented. No Minimal The module is instrumented but no data is collected for it. No Basics of VTune™ Performance Analyzer 59 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

More Advanced Call Graph Options Cache directory location This is useful for long runs and very large applications. If you do not set this, the machine might run low on memory. Allow call graph to instrument COM interfaces. Basics of VTune™ Performance Analyzer 60 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Function Selection Click here to enable or disable instrumentation for a particular function. Basics of VTune™ Performance Analyzer 61 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Use Sampling and Call Graph Together Use sampling to find which functions have hotspots. Use call graph to find out who is calling these functions. Basics of VTune™ Performance Analyzer 62 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Lab Activity 6: Using Sampling and Call Graph Together Optimize an application (linpack) using sampling and call graph Basics of VTune™ Performance Analyzer 63 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Sampling and Call Graph Have Different Hotspots? Self time includes blocked time. Event-based sampling (EBS) and time-based sampling (TBS) do not include blocked time in functions (this usually appears in processor. sys). Hotspots should be the same for self time – wait time (this is non-blocked self time). Basics of VTune™ Performance Analyzer 64 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

What Counter Monitor Does Collects hardware and software performance counter data • Windows* Perfmon* counters • Performance DLL SDK Correlate counter data with sampling data Basics of VTune™ Performance Analyzer 65 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Performance DLL SDK for creating custom performance counters that can be used by counter monitor Example: performance counter that measures the transactions per second for a server application Basics of VTune™ Performance Analyzer 67 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Monitor Window Click to highlight different counter data in the graph. Basics of VTune™ Performance Analyzer 68 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

To Correlate Sampling Data Click the highlight icon and highlight a time slice by dragging over the graph from left to right. Click on the drill icon. You should now see the sampling data for that time slice. Basics of VTune™ Performance Analyzer 69 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Lab Activity 7: Counter Monitor Use counter monitor to analyze gzip Basics of VTune™ Performance Analyzer 70 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.

Trigger API Allows you to create your own mechanism to programmatically trigger performance counter data collection Example: collect counter monitor data every time a frame is rendered Basics of VTune™ Performance Analyzer 71 Copyright © 2006, Intel Corporation. All rights reserved. Intel and the Intel logo are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States or other countries. *Other brands and names are the property of their respective owners.