So, there is a 500 ms poll on _PS0, polling on the state of \_SBI.INF
which I believe is a Systems Management Interface (SMI) state field:
Name (FWSO, "FWSO")
Name (_PSC, 0x00) // _PSC: Power State Current
Method (_PS0, 0, NotSerialized) // _PS0: Power State 0
{
Store (_PSC, Local0)
Store (0x00, _PSC) /* \_PSC */
If (LEqual (Local0, 0x03))
{
Store (0x01, \_SB.INF)
While (\_SB.INF)
{
Store (0x20, \_SB.BCMD)
Store (Zero, \_SB.SMIC)
If (LAnd (LEqual (\_SB.INF, 0x01), LGreaterEqual (\_SB.OSTB,
0x04)))
{
Sleep (0x01F4)
}
}
}
}
So it is plausible that every SMI may be producing a bunch of sleeps.
GPE L01 is also performing 2 x 100ms sleeps:
Method (_L01, 0, NotSerialized) // _Lxx: Level-Triggered GPE
{
Store (0x01, DEBG) /* \DEBG */
Sleep (0x64)
Sleep (0x64)
If (\_SB.PCI0.EXP1.HPCS)
{
If (\_SB.PCI0.EXP1.PDC1)
{
Store (0x01, \_SB.PCI0.EXP1.PDC1)
}
If (\_SB.PCI0.EXP1.ABP1)
{
Store (0x01, \_SB.PCI0.EXP1.ABP1)
}
Store (0x01, \_SB.PCI0.EXP1.HPCS)
Notify (\_SB.PCI0.EXP1, 0x01) // Device Check
If (\_SB.PCI0.EXP1.PDS1)
{
Store (0x21, DEBG) /* \DEBG */
If (LEqual (\_SB.PCI0.EXP1.PXS1.X1DV, 0xFFFFFFFF))
{
Store (0x2F, DEBG) /* \DEBG */
}
}
Else
{
Store (0x20, DEBG) /* \DEBG */
}
}
}
And GPE L09 is performing a few 300 and 100ms sleeps:
Method (_L09, 0, NotSerialized) // _Lxx: Level-Triggered GPE
{
Store (0x09, DEBG) /* \DEBG */
Sleep (0x012C)
Sleep (0x64)
If (\_SB.PCI0.EXP1.PSP1)
{
Store (0x01, \_SB.PCI0.EXP1.PSP1)
Store (0x01, \_SB.PCI0.EXP1.PMCS)
Store (0x01, \_SB.PCI0.EXP1.PSP1)
Notify (\_SB.PCI0.EXP1, 0x02) // Device Wake
}
If (\_SB.PCI0.EXP5.PSP5)
{
Store (0x01, \_SB.PCI0.EXP5.PSP5)
Store (0x01, \_SB.PCI0.EXP5.PMCS)
Notify (\_SB.PCI0.EXP5, 0x02) // Device Wake
}
}
..and these General Purpose Event handler are also performing some
occasional sleeps too. Once can see how often these GPEs are being
triggered using cat /sys/firmware/acpi/interrupts/gpe01
/sys/firmware/acpi/interrupts/gpe09
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https://bugs.launchpad.net/bugs/1472293
Title:
load >= 1 while idle for no obvious reason with ACPI
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