CO_LAB_3
D.Shanmukh
Cs21b018
1)perf: perf is a performance analysis tool for Linux systems that
provides a variety of sub-commands for measuring various
performance metrics, including CPU performance, memory
performance, and more. perf is designed to be used by system
administrators and developers to diagnose performance issues and
improve system performance.
How to use: The perf command can be used in a variety of ways,
depending on the desired performance metric and the sub-command
used. For example, to measure CPU performance, the following
command can be used:
$ perf stat -e cycles -a
This will measure the number of CPU cycles used by all tasks on the
system. To measure memory performance, the following command
can be used:
$ perf mem -v
This will display a detailed breakdown of memory usage by tasks on
the system.
Example: In this example, we use the perf command to measure CPU
performance. The following command will measure the number of
CPU cycles used by all tasks on the system.
$ perf stat -e cycles -a [The output of this command will display the
number of CPU cycles used by all tasks on the system.]
2) cat /proc/cpuinfo: The "cat /proc/cpuinfo" command is used to
display information about the CPU(s) on a Linux system. This
information includes details about the architecture, clock speed,
cache size, and other information about the CPU(s) that can be
useful for performance analysis and optimization.
How to use: Simply run the command "cat /proc/cpuinfo" in the
terminal. The output of this command will provide detailed
information about the CPU(s) on the system.
Example: In this example, we use the "cat /proc/cpuinfo" command
to display information about the CPU(s) on a Linux system.
$ cat /proc/cpuinfo [The output of this command will provide
detailed information about the CPU(s) on the system, including
details about the architecture, clock speed, cache size, and more.]
3) lscpu: lscpu is a command line tool that displays information about
the CPU architecture and hardware on a Linux system. It provides a
detailed view of the CPU, including information about the number of
processors, cores, and threads, clock speed, architecture, and cache
size.
How to use: Simply run the command "lscpu" in the terminal. The
output of this command will provide detailed information about the
CPU architecture and hardware.
Example: In this example, we use the lscpu command to display
information about the CPU architecture and hardware on a Linux
system.
$ lscpu [The output of this command will provide detailed
information about the CPU, including information about the number
of processors, cores, and threads, clock speed, architecture, and
cache size.]
4) time <executable>: The time command is used to measure the
amount of time it takes for an executable to run. This can be useful
for performance analysis, as it provides a way to measure the
execution time of an application or command.
How to use: To measure the execution time of an executable, simply
run the time command followed by the name of the executable, like
this:
$ time <executable>
Example: In this example, we use the time command to measure the
execution time of the "ls" command.
$ time ls [The output of this command will display the amount of
time it took for the "ls" command to run, along with other
information such as memory usage.]
5) cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq: The
"cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq"
command is used to display the current frequency of the CPU. This
information can be useful for performance analysis and optimization.
How to use: Simply run the command "cat
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq" in the
terminal. The output of this command will provide the current
frequency of the CPU in kilohertz.
Example: In this example, we use the "cat
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq" command
to display the current frequency of the CPU.
$ cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq [The
output of this command will provide the current frequency of the
CPU in kilohertz.]