lkml.org 
[lkml]   [2009]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectlatencytop vs. SCHED_DEBUG log spamming
Hi,

a minor issue I noticed on a Samsung N130 (Atom N270):

I enabled CONFIG_LATENCYTOP which selects CONFIG_SCHED_DEBUG.
When the netbook is running on battery the BIOS apparently
changes the available C-states frequently (or something like that),
which causes the log to spammed with messages like:

[ 2126.226152] Monitor-Mwait will be used to enter C-3 state
[ 2126.269062] CPU0 attaching NULL sched-domain.
[ 2126.269078] CPU1 attaching NULL sched-domain.
[ 2126.280191] CPU0 attaching sched-domain:
[ 2126.280222] domain 0: span 0-1 level SIBLING
[ 2126.280238] groups: 0 (cpu_power = 589) 1 (cpu_power = 589)
[ 2126.280272] domain 1: span 0-1 level MC
[ 2126.280286] groups: 0-1 (cpu_power = 1178)
[ 2126.280313] CPU1 attaching sched-domain:
[ 2126.280325] domain 0: span 0-1 level SIBLING
[ 2126.280339] groups: 1 (cpu_power = 589) 0 (cpu_power = 589)
[ 2126.280370] domain 1: span 0-1 level MC
[ 2126.280384] groups: 0-1 (cpu_power = 1178)
[ 2126.471828] CPU0 attaching NULL sched-domain.
[ 2126.471842] CPU1 attaching NULL sched-domain.
[ 2126.480353] CPU0 attaching sched-domain:
[ 2126.480368] domain 0: span 0-1 level SIBLING
[ 2126.480381] groups: 0 (cpu_power = 589) 1 (cpu_power = 589)
[ 2126.480406] domain 1: span 0-1 level MC
[ 2126.480416] groups: 0-1 (cpu_power = 1178)
[ 2126.480438] CPU1 attaching sched-domain:
[ 2126.480447] domain 0: span 0-1 level SIBLING
[ 2126.480457] groups: 1 (cpu_power = 589) 0 (cpu_power = 589)
[ 2126.480481] domain 1: span 0-1 level MC
[ 2126.480491] groups: 0-1 (cpu_power = 1178)
[ 2129.784288] CPU0 attaching NULL sched-domain.
[ 2129.784301] CPU1 attaching NULL sched-domain.
[ 2129.796112] CPU0 attaching sched-domain:
[ 2129.796122] domain 0: span 0-1 level SIBLING
[ 2129.796131] groups: 0 (cpu_power = 589) 1 (cpu_power = 589)
[ 2129.796148] domain 1: span 0-1 level MC
[ 2129.796155] groups: 0-1 (cpu_power = 1178)
[ 2129.796169] CPU1 attaching sched-domain:
[ 2129.796175] domain 0: span 0-1 level SIBLING
[ 2129.796182] groups: 1 (cpu_power = 589) 0 (cpu_power = 589)
[ 2129.796198] domain 1: span 0-1 level MC
[ 2129.796204] groups: 0-1 (cpu_power = 1178)
[ 2319.551963] CPU0 attaching NULL sched-domain.
[ 2319.551976] CPU1 attaching NULL sched-domain.
[ 2319.561358] CPU0 attaching sched-domain:
[ 2319.561370] domain 0: span 0-1 level SIBLING
[ 2319.561380] groups: 0 (cpu_power = 589) 1 (cpu_power = 589)
[ 2319.561401] domain 1: span 0-1 level MC
[ 2319.561409] groups: 0-1 (cpu_power = 1178)
[ 2319.561426] CPU1 attaching sched-domain:
[ 2319.561433] domain 0: span 0-1 level SIBLING
[ 2319.561442] groups: 1 (cpu_power = 589) 0 (cpu_power = 589)
[ 2319.561460] domain 1: span 0-1 level MC
[ 2319.561468] groups: 0-1 (cpu_power = 1178)
[ 2338.499309] CPU0 attaching NULL sched-domain.
[ 2338.499324] CPU1 attaching NULL sched-domain.
[ 2338.508161] CPU0 attaching sched-domain:
[ 2338.508174] domain 0: span 0-1 level SIBLING
[ 2338.508184] groups: 0 (cpu_power = 589) 1 (cpu_power = 589)
[ 2338.508204] domain 1: span 0-1 level MC
[ 2338.508213] groups: 0-1 (cpu_power = 1178)
[ 2338.508230] CPU1 attaching sched-domain:
[ 2338.508237] domain 0: span 0-1 level SIBLING
[ 2338.508245] groups: 1 (cpu_power = 589) 0 (cpu_power = 589)
[ 2338.508264] domain 1: span 0-1 level MC
[ 2338.508272] groups: 0-1 (cpu_power = 1178)

etc. pp.

It would be nice if sched_domain_debug() output
could be decoupled from CONFIG_LATENCYTOP.


Thanks,
Johannes


\
 
 \ /
  Last update: 2009-11-25 18:25    [W:0.035 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site