acpi_idle_enter_bm & mwait_idle
Hello,
I am sorry for bugging you guys here, but I've got a question and I think it best fits here. I have an Acer laptop, namely TravelMate 5320 with a Linux OS (uname -a gives: Linux seagull 2.6.30-gentoo-r4 #4 Sat Aug 15 01:29:44 EEST 2009 i686 Intel(R) Celeron(R) CPU 550 @ 2.00GHz GenuineIntel GNU/Linux). What I'm observing are regular streak of system unreponsiveness. Performance monitors show an activity of high-nice processes during these periods. OProfile gives ~24% time eaten by apci_idle_enter_bm() with ACPI enabled and 35% time by mwait_idle() with acpi=off, regardless of streak presence or just smooth operating time. My question is how can I debug more indepth to see what's happening and what the named functions do so I can or can't blame them for unusable system. Thanks in advance.
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Oleksiy Protas National University «Kyiv-Mohyla Academy» Institute of Molecular Biology and Genetics, Ukraine This message is signed. You can obtain a public key to verify it here: http://minsky.surfnet.nl:11371/pks/lookup?op=get&search=0x81B636D4F015B7EC
Those functions are called when there is nothing to do for the processor. Is it possible that your system is doing disk accesses when the slowdown happens?
Corrado
Quoted 20 lines · Oleksiy Protas
Hello,
I am sorry for bugging you guys here, but I've got a question and I think it best fits here. I have an Acer laptop, namely TravelMate 5320 with a Linux OS (uname -a gives: Linux seagull 2.6.30-gentoo-r4 #4 Sat Aug 15 01:29:44 EEST 2009 i686 Intel(R) Celeron(R) CPU 550 @ 2.00GHz GenuineIntel GNU/Linux). What I'm observing are regular streak of system unreponsiveness. Performance monitors show an activity of high-nice processes during these periods. OProfile gives ~24% time eaten by
apci_idle_enter_bm()with ACPI enabled and 35% time bymwait_idle()with acpi=off, regardless of streak presence or just smooth operating time. My question is how can I debug more indepth to see what's happening and what the named functions do so I can or can't blame them for unusable system. Thanks in advance.
--
Oleksiy Protas
National University «Kyiv-Mohyla Academy»
Institute of Molecular Biology and Genetics, Ukraine
This message is signed. You can obtain a public key to verify it here:
http://minsky.surfnet.nl:11371/pks/lookup?op=get&search=0x81B636D4F015B7EC
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