Features/PowerManagement/scomes

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(scomes - measure amount of system resources consumed by the program)
(Explain statistics)
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== Explain statistics ==
 
== Explain statistics ==
  
* Monitored execname:: name of the binary (passed as a command-line argument)
+
;Monitored execname
* Number of syscalls:: number of all syscalls performed by the binary
+
:name of the binary (passed as a command-line argument)
* Kernel/Userspace ticks:: count of the processor ticks binary uses in the kernel or in userspace respectively (`kticks` and `uticks` variables)
+
;Number of syscalls
* Read/Written bytes:: sum of the read and written bytes from the file binary does (`readwrites` variable)
+
:number of all syscalls performed by the binary
* Transmitted/Recived bytes:: sum of the read and written bytes from the network binary does (`ifxmit` and `ifrecv` variables)
+
;Kernel/Userspace ticks
* Pooling syscalls:: "bad" pooling syscals binary does (poll, select, epoll, itimer, futex, nanosleep, signal)
+
:count of the processor ticks binary uses in the kernel or in userspace respectively (`kticks` and `uticks` variables)
* SCORE:: '''TODO''' - but for now: `SCORE = kticks + 2*uticks + 10*readwrites + ifxmit + ifrecv`
+
;Read/Written bytes
 
+
:sum of the read and written bytes from the file binary does (`readwrites` variable)
 +
;Transmitted/Recived bytes
 +
:sum of the read and written bytes from the network binary does (`ifxmit` and `ifrecv` variables)
 +
;Pooling syscalls
 +
:"bad" pooling syscals binary does (poll, select, epoll, itimer, futex, nanosleep, signal)
 +
;SCORE
 +
:'''TODO''' - but for now: `SCORE = kticks + 2*uticks + 10*readwrites + ifxmit + ifrecv`
  
 
== First examples ==
 
== First examples ==

Revision as of 14:18, 23 June 2009

To be done. Please see Features/PowerManagement for now.

Contents

scomes

Goal: Measure amount of system resources consumed by the program.

Download: http://fedorapeople.org/~plautrba/scomes


Usage

Prepare your system:

# yum install systemtap
# debuginfo-install kernel


Use scomes.py wrapper

 
scomes.py [-u] -- <binary> [binary args]
    -u, --unique     copy binary to unique filename to avoid conflicts with multiple same-called running binaries
    <binary>         binary you want to measure, has to be with absolute or relative path related to cwd
# scomes.py -u -- /bin/sleep 5
new binary /tmp/scomeslp52_r
run: ['/usr/bin/scomes.stp', '--skip-badvars', 'scomeslp52_r']
run /tmp/scomeslp52_r ['5']
scomes.stp: -----------------------------------
scomes.stp: LAST RESULTS:
scomes.stp: -----------------------------------
scomes.stp: Monitored execname: /bin/sleep
scomes.stp: Number of syscalls: 61
scomes.stp: Kernel/Userspace ticks: 2/0
scomes.stp: Read/Written bytes: 2888
scomes.stp: Transmitted/Recived bytes: 0
scomes.stp: Pooling syscalls: 1
scomes.stp: SCORE: 28882
scomes.stp: -----------------------------------
scomes.stp: QUITTING
scomes.stp: -----------------------------------

Run scomes.stp manually

Binary you want to measure must be named uniquely (or ensure there are no other binaries with same name running on the system).

Now run the scomes with the command-line option being name of the binary and then run the binary:

# scomes.stp my_binary_3d4f8   # wait untill it starts
# ./my_binary_3d4f8

scomes will start to output statistics each 5 seconds and once binary ends, it will output final statistic like this:

Monitored execname: my_binary_3d4f8
Number of syscalls: 0
Kernel/Userspace ticks: 0/0
Read/Written bytes: 0
Transmitted/Recived bytes: 0
Pooling syscalls: 0
SCORE: 0
-----------------------------------
Monitored execname: my_binary_3d4f8
Number of syscalls: 3716
Kernel/Userspace ticks: 34/339
Read/Written bytes: 446282
Transmitted/Recived bytes: 16235
Pooling syscalls: 2
SCORE: 4479767
-----------------------------------
LAST RESULTS:
-----------------------------------
Monitored execname: my_binary_3d4f8
Number of syscalls: 4529
Kernel/Userspace ticks: 44/446
Read/Written bytes: 454352
Transmitted/Recived bytes: 22003
Pooling syscalls: 3
SCORE: 4566459
-----------------------------------
QUITTING
-----------------------------------

Note: on F11 please call scomes with `stap --skip-badvars scomes.stp`.


Explain statistics

Monitored execname
name of the binary (passed as a command-line argument)
Number of syscalls
number of all syscalls performed by the binary
Kernel/Userspace ticks
count of the processor ticks binary uses in the kernel or in userspace respectively (`kticks` and `uticks` variables)
Read/Written bytes
sum of the read and written bytes from the file binary does (`readwrites` variable)
Transmitted/Recived bytes
sum of the read and written bytes from the network binary does (`ifxmit` and `ifrecv` variables)
Pooling syscalls
"bad" pooling syscals binary does (poll, select, epoll, itimer, futex, nanosleep, signal)
SCORE
TODO - but for now: `SCORE = kticks + 2*uticks + 10*readwrites + ifxmit + ifrecv`

First examples

http://fedoraproject.org/wiki/Features/PowerManagement/scomes/examples

command sleep 10

normal:

Monitored execname: sleep
Number of syscalls: 33
Kernel/Userspace ticks: 2/0
Read/Written bytes: 736
Transmitted/Recived bytes: 0
Pooling syscalls: 1
SCORE: 7362

busybox - statically linked:

Monitored execname: busybox
Number of syscalls: 7
Kernel/Userspace ticks: 1/0
Read/Written bytes: 0
Transmitted/Recived bytes: 0
Pooling syscalls: 1
SCORE: 1

busybox.anaconda - dynamically linked:

Monitored execname: sleep
Number of syscalls: 39
Kernel/Userspace ticks: 0/2
Read/Written bytes: 1248
Transmitted/Recived bytes: 0
Pooling syscalls: 0
SCORE: 12484