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Orga-Ejercicios

Ejercicios de organización de datos - MIPS

######Crear en el host con el usuario root un alias para la interfaz loopback

ifconfig lo:0 172.20.0.1

######Inicio imagen netbsd

./xgxemul -e 3max -d netbsd-pmax.img -x

######Abrir el tunel a unix desde netbsd

ssh -R 2222:127.0.0.1:22 [email protected]

######Abrir shells remotos desde host contra guest

ssh -p 2222 [email protected]

######Pasar el arch desde host al guest

scp -P2222 -r ./tp1.s [email protected]:/root

Análisis con Cachegrid 👍

El módulo Cachegrid de Valgrind nos permite observar las referencias a memoria por instrucciones y datos, y los misses en los distintos niveles de caché. Cachegrind denomina LL al cache de ´ultimo nivel - Last Level - que podría ser L2 o L3 dependiendo de la computadora bajo estudio.

Ejemplo:

generar el ejecutable compilando con la opción -g

gcc -Wall -g -o Factorial Factorial.c factorial.S

el profiling del cache de nuestro programa lo ejecutamos así

valgrind --tool=cachegrind ./Factorial < archivoDeEntrada.txt > archivoSalida.out

si compilamos con la opción -g podemos ejecutar cg_annotate para obtener una presentación detallada del profiling realizado con cachegrind.

cg_annotate --auto=yes cachegrind.out.5537

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