Machine no longer enters C3 on 2.6.11-rc1-bk
Hi!
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
Pavel
Signature · 2 lines
People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!
Quoted 6 lines · Pavel Machek
Hi!
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
I did notice too that it was never in C3 apart from a bit right at the beginning, since 2.6.10. It has always been like that up to 2.6.6, became better from 2.6.7 (but had other problems with that).
Fred
P.S. I didn't check bus master activity. How do you do that?
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Hi!
Quoted 8 lines
Quoted 4 lines
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
I did notice too that it was never in C3 apart from a bit right at the beginning, since 2.6.10. It has always been like that up to 2.6.6, became better from 2.6.7 (but had other problems with that).
Good, so I'm not alone.
Quoted 1 line
P.S. I didn't check bus master activity. How do you do that?
cat /proc/acpi/processor/*/power
Pavel
Signature · 9 lines
People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl
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Quoted 8 lines · Pavel Machek
Hi!
Quoted 5 lines
Quoted 4 lines
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
Quoted 7 lines
Quoted 3 lines
I did notice too that it was never in C3 apart from a bit right at the beginning, since 2.6.10. It has always been like that up to 2.6.6, became better from 2.6.7 (but had other problems with that).
Good, so I'm not alone.
I see the same thing. Furthermore, my CPU never appears to enter C1 either (except at the beginning). Is this aspect of the behaviour normal?
By the way, the bus master activity always appears as ffffffff.
cheers,
Rich
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Quoted 15 lines · Rich Townsend
Quoted 13 lines · Pavel Machek
Hi!
Quoted 7 lines
Quoted 4 lines
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
I did notice too that it was never in C3 apart from a bit right at the beginning, since 2.6.10. It has always been like that up to 2.6.6, became better from 2.6.7 (but had other problems with that).
Quoted 6 lines
Quoted 2 lines
Good, so I'm not alone.
I see the same thing. Furthermore, my CPU never appears to enter C1 either (except at the beginning). Is this aspect of the behaviour normal?
By the way, the bus master activity always appears as ffffffff.
Gak, I just read the wiki, and USB was the culprit. But that doesn't explain why I'm not seeing any transitions to C1, even under full load.
cheers,
Rich
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Quoted 2 lines · Rich Townsend
Gak, I just read the wiki, and USB was the culprit. But that doesn't explain why I'm not seeing any transitions to C1, even under full load.
This is normal for the current code -- we run C1 16 times and promote, but if C2 latency is very low, we never demote to C1:
[root@d600 root]# cat /proc/acpi/processor/CPU0/power
active state: C4 max_cstate: C8 bus master activity: 00000000
states:
C1: type[C1] promotion[C2] demotion[--] latency[001] usage[00000010]
C2: type[C2] promotion[C3] demotion[C1] latency[001] usage[00266192]
C3: type[C3] promotion[C4] demotion[C2] latency[085] usage[00028664]
*C4: type[C3] promotion[--] demotion[C3] latency[185] usage[00359811]
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Hi!
Quoted 10 lines
Quoted 4 lines
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
I did notice too that it was never in C3 apart from a bit right at the beginning, since 2.6.10. It has always been like that up to 2.6.6, became better from 2.6.7 (but had other problems with that).
P.S. I didn't check bus master activity. How do you do that?
There's something wrong with bus master activity indicator: it seems to be updated every HZ or something like that... that results in a bad stuff if HZ=100... activiy is now non-zero and machine refuses to go C3.
Pavel
Signature · 9 lines
People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl
Hi!
Quoted 5 lines
Quoted 4 lines
bus master activity: is changing all the time, mostly 555555555 and aaaaaaa, and cpu refuses to enter C3 for obvious reasons. I compiled out USB and sound... Does anybody else see the same problem?
Quoted 7 lines
I did notice too that it was never in C3 apart from a bit right at the beginning, since 2.6.10. It has always been like that up to 2.6.6, became better from 2.6.7 (but had other problems with that).
Fred
P.S. I didn't check bus master activity. How do you do that?
can you try to kill all bm_activity++ things in drivers/acpi/processor.c and see what it does to your power consumption. (Warning: it may do bad stuff to your performance).
Pavel
Signature · 9 lines
People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl