* Hard Disk consumes lots of power in s2idle @ 2020-02-19 14:22 Kai-Heng Feng 2020-02-19 18:36 ` Srinivas Pandruvada 0 siblings, 1 reply; 7+ messages in thread From: Kai-Heng Feng @ 2020-02-19 14:22 UTC (permalink / raw) To: Srinivas Pandruvada; +Cc: Linux PM, linux-ide, open list, Kent Lin Hi Srinivas, Your previous work to support DEVSLP works well on SATA SSDs, so I am asking you the issue I am facing: Once a laptop has a HDD installed, the power consumption during S2Idle increases ~0.4W, which is quite a lot. However, HDDs don't seem to support DEVSLP, so I wonder if you know to do proper power management for HDDs? Kai-Heng ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Hard Disk consumes lots of power in s2idle 2020-02-19 14:22 Hard Disk consumes lots of power in s2idle Kai-Heng Feng @ 2020-02-19 18:36 ` Srinivas Pandruvada 2020-02-20 8:08 ` Kai-Heng Feng 0 siblings, 1 reply; 7+ messages in thread From: Srinivas Pandruvada @ 2020-02-19 18:36 UTC (permalink / raw) To: Kai-Heng Feng; +Cc: Linux PM, linux-ide, open list, Kent Lin Hi Kai, On Wed, 2020-02-19 at 22:22 +0800, Kai-Heng Feng wrote: > Hi Srinivas, > > Your previous work to support DEVSLP works well on SATA SSDs, so I am > asking you the issue I am facing: > Once a laptop has a HDD installed, the power consumption during > S2Idle increases ~0.4W, which is quite a lot. > However, HDDs don't seem to support DEVSLP, so I wonder if you know > to do proper power management for HDDs? What is the default here cat /sys/power/mem_sleep s2idle or deep? Please follow debug steps here: https://01.org/blogs/qwang59/2018/how-achieve-s0ix-states-linux We need to check whether you get any PC10 residency or not. Thanks, Srinivas > > Kai-Heng ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Hard Disk consumes lots of power in s2idle 2020-02-19 18:36 ` Srinivas Pandruvada @ 2020-02-20 8:08 ` Kai-Heng Feng 2020-02-20 10:12 ` Rafael J. Wysocki 0 siblings, 1 reply; 7+ messages in thread From: Kai-Heng Feng @ 2020-02-20 8:08 UTC (permalink / raw) To: Srinivas Pandruvada; +Cc: Linux PM, linux-ide, open list, Kent Lin Hi Srinivas, > On Feb 20, 2020, at 02:36, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > > Hi Kai, > > On Wed, 2020-02-19 at 22:22 +0800, Kai-Heng Feng wrote: >> Hi Srinivas, >> >> Your previous work to support DEVSLP works well on SATA SSDs, so I am >> asking you the issue I am facing: >> Once a laptop has a HDD installed, the power consumption during >> S2Idle increases ~0.4W, which is quite a lot. >> However, HDDs don't seem to support DEVSLP, so I wonder if you know >> to do proper power management for HDDs? > What is the default here > cat /sys/power/mem_sleep > s2idle or deep? It defaults to s2idle. > > Please follow debug steps here: > https://01.org/blogs/qwang59/2018/how-achieve-s0ix-states-linux > > We need to check whether you get any PC10 residency or not. Yes it reaches PC10. It doesn't reach SLP_S0 though. The real number on S2Idle power consumption: No HDD: ~1.4W One HDD: ~1.8W If the SoC doesn't hit PC10 the number should be significantly higher. That's why I think the issue is the power management on HDD itself. Kai-Heng > > Thanks, > Srinivas > > >> >> Kai-Heng > ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Hard Disk consumes lots of power in s2idle 2020-02-20 8:08 ` Kai-Heng Feng @ 2020-02-20 10:12 ` Rafael J. Wysocki 2020-02-20 10:24 ` Kai-Heng Feng 0 siblings, 1 reply; 7+ messages in thread From: Rafael J. Wysocki @ 2020-02-20 10:12 UTC (permalink / raw) To: Kai-Heng Feng Cc: Srinivas Pandruvada, Linux PM, open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers), open list, Kent Lin, Tejun Heo On Thu, Feb 20, 2020 at 9:08 AM Kai-Heng Feng <kai.heng.feng@canonical.com> wrote: > > Hi Srinivas, > > > On Feb 20, 2020, at 02:36, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > > > > Hi Kai, > > > > On Wed, 2020-02-19 at 22:22 +0800, Kai-Heng Feng wrote: > >> Hi Srinivas, > >> > >> Your previous work to support DEVSLP works well on SATA SSDs, so I am > >> asking you the issue I am facing: > >> Once a laptop has a HDD installed, the power consumption during > >> S2Idle increases ~0.4W, which is quite a lot. > >> However, HDDs don't seem to support DEVSLP, so I wonder if you know > >> to do proper power management for HDDs? > > What is the default here > > cat /sys/power/mem_sleep > > s2idle or deep? > > It defaults to s2idle. > > > > > Please follow debug steps here: > > https://01.org/blogs/qwang59/2018/how-achieve-s0ix-states-linux > > > > We need to check whether you get any PC10 residency or not. > > Yes it reaches PC10. It doesn't reach SLP_S0 though. > The real number on S2Idle power consumption: > No HDD: ~1.4W > One HDD: ~1.8W > > If the SoC doesn't hit PC10 the number should be significantly higher. > That's why I think the issue is the power management on HDD itself. I'm assuming that you mean a non-SSD device here. That would be handled via ata_port_suspend() I gather and whatever that does should do the right thing. Do you think that the disk doesn't spin down or it spins down, but the logic stays on? ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Hard Disk consumes lots of power in s2idle 2020-02-20 10:12 ` Rafael J. Wysocki @ 2020-02-20 10:24 ` Kai-Heng Feng 2020-02-20 10:34 ` Rafael J. Wysocki 0 siblings, 1 reply; 7+ messages in thread From: Kai-Heng Feng @ 2020-02-20 10:24 UTC (permalink / raw) To: Rafael J. Wysocki Cc: Srinivas Pandruvada, Linux PM, open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers), open list, Kent Lin, Tejun Heo > On Feb 20, 2020, at 18:12, Rafael J. Wysocki <rafael@kernel.org> wrote: > > On Thu, Feb 20, 2020 at 9:08 AM Kai-Heng Feng > <kai.heng.feng@canonical.com> wrote: >> >> Hi Srinivas, >> >>> On Feb 20, 2020, at 02:36, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: >>> >>> Hi Kai, >>> >>> On Wed, 2020-02-19 at 22:22 +0800, Kai-Heng Feng wrote: >>>> Hi Srinivas, >>>> >>>> Your previous work to support DEVSLP works well on SATA SSDs, so I am >>>> asking you the issue I am facing: >>>> Once a laptop has a HDD installed, the power consumption during >>>> S2Idle increases ~0.4W, which is quite a lot. >>>> However, HDDs don't seem to support DEVSLP, so I wonder if you know >>>> to do proper power management for HDDs? >>> What is the default here >>> cat /sys/power/mem_sleep >>> s2idle or deep? >> >> It defaults to s2idle. >> >>> >>> Please follow debug steps here: >>> https://01.org/blogs/qwang59/2018/how-achieve-s0ix-states-linux >>> >>> We need to check whether you get any PC10 residency or not. >> >> Yes it reaches PC10. It doesn't reach SLP_S0 though. >> The real number on S2Idle power consumption: >> No HDD: ~1.4W >> One HDD: ~1.8W >> >> If the SoC doesn't hit PC10 the number should be significantly higher. >> That's why I think the issue is the power management on HDD itself. > > I'm assuming that you mean a non-SSD device here. Yes, it's spinning rust here. > > That would be handled via ata_port_suspend() I gather and whatever > that does should do the right thing. > > Do you think that the disk doesn't spin down or it spins down, but the > logic stays on? The spin sound is audible, so I am certain the HDD spins down during S2Idle. How do I know if the logic is on or off? Kai-Heng ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Hard Disk consumes lots of power in s2idle 2020-02-20 10:24 ` Kai-Heng Feng @ 2020-02-20 10:34 ` Rafael J. Wysocki 2020-02-20 11:21 ` Kai-Heng Feng 0 siblings, 1 reply; 7+ messages in thread From: Rafael J. Wysocki @ 2020-02-20 10:34 UTC (permalink / raw) To: Kai-Heng Feng Cc: Rafael J. Wysocki, Srinivas Pandruvada, Linux PM, open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers), open list, Kent Lin, Tejun Heo On Thu, Feb 20, 2020 at 11:25 AM Kai-Heng Feng <kai.heng.feng@canonical.com> wrote: > > > > > On Feb 20, 2020, at 18:12, Rafael J. Wysocki <rafael@kernel.org> wrote: > > > > On Thu, Feb 20, 2020 at 9:08 AM Kai-Heng Feng > > <kai.heng.feng@canonical.com> wrote: > >> > >> Hi Srinivas, > >> > >>> On Feb 20, 2020, at 02:36, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > >>> > >>> Hi Kai, > >>> > >>> On Wed, 2020-02-19 at 22:22 +0800, Kai-Heng Feng wrote: > >>>> Hi Srinivas, > >>>> > >>>> Your previous work to support DEVSLP works well on SATA SSDs, so I am > >>>> asking you the issue I am facing: > >>>> Once a laptop has a HDD installed, the power consumption during > >>>> S2Idle increases ~0.4W, which is quite a lot. > >>>> However, HDDs don't seem to support DEVSLP, so I wonder if you know > >>>> to do proper power management for HDDs? > >>> What is the default here > >>> cat /sys/power/mem_sleep > >>> s2idle or deep? > >> > >> It defaults to s2idle. > >> > >>> > >>> Please follow debug steps here: > >>> https://01.org/blogs/qwang59/2018/how-achieve-s0ix-states-linux > >>> > >>> We need to check whether you get any PC10 residency or not. > >> > >> Yes it reaches PC10. It doesn't reach SLP_S0 though. > >> The real number on S2Idle power consumption: > >> No HDD: ~1.4W > >> One HDD: ~1.8W > >> > >> If the SoC doesn't hit PC10 the number should be significantly higher. > >> That's why I think the issue is the power management on HDD itself. > > > > I'm assuming that you mean a non-SSD device here. > > Yes, it's spinning rust here. > > > > > That would be handled via ata_port_suspend() I gather and whatever > > that does should do the right thing. > > > > Do you think that the disk doesn't spin down or it spins down, but the > > logic stays on? > > The spin sound is audible, so I am certain the HDD spins down during S2Idle. OK > How do I know if the logic is on or off? Well, if it were off, it would not draw power. :-) So IMO it is reasonable to assume that the logic on the drive stays on. I'm not aware of anything that can be done to turn it off, however. ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Hard Disk consumes lots of power in s2idle 2020-02-20 10:34 ` Rafael J. Wysocki @ 2020-02-20 11:21 ` Kai-Heng Feng 0 siblings, 0 replies; 7+ messages in thread From: Kai-Heng Feng @ 2020-02-20 11:21 UTC (permalink / raw) To: Rafael J. Wysocki Cc: Srinivas Pandruvada, Linux PM, open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers), open list, Kent Lin, Tejun Heo > On Feb 20, 2020, at 18:34, Rafael J. Wysocki <rafael@kernel.org> wrote: > > On Thu, Feb 20, 2020 at 11:25 AM Kai-Heng Feng > <kai.heng.feng@canonical.com> wrote: >> >> >> >>> On Feb 20, 2020, at 18:12, Rafael J. Wysocki <rafael@kernel.org> wrote: >>> >>> On Thu, Feb 20, 2020 at 9:08 AM Kai-Heng Feng >>> <kai.heng.feng@canonical.com> wrote: >>>> >>>> Hi Srinivas, >>>> >>>>> On Feb 20, 2020, at 02:36, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: >>>>> >>>>> Hi Kai, >>>>> >>>>> On Wed, 2020-02-19 at 22:22 +0800, Kai-Heng Feng wrote: >>>>>> Hi Srinivas, >>>>>> >>>>>> Your previous work to support DEVSLP works well on SATA SSDs, so I am >>>>>> asking you the issue I am facing: >>>>>> Once a laptop has a HDD installed, the power consumption during >>>>>> S2Idle increases ~0.4W, which is quite a lot. >>>>>> However, HDDs don't seem to support DEVSLP, so I wonder if you know >>>>>> to do proper power management for HDDs? >>>>> What is the default here >>>>> cat /sys/power/mem_sleep >>>>> s2idle or deep? >>>> >>>> It defaults to s2idle. >>>> >>>>> >>>>> Please follow debug steps here: >>>>> https://01.org/blogs/qwang59/2018/how-achieve-s0ix-states-linux >>>>> >>>>> We need to check whether you get any PC10 residency or not. >>>> >>>> Yes it reaches PC10. It doesn't reach SLP_S0 though. >>>> The real number on S2Idle power consumption: >>>> No HDD: ~1.4W >>>> One HDD: ~1.8W >>>> >>>> If the SoC doesn't hit PC10 the number should be significantly higher. >>>> That's why I think the issue is the power management on HDD itself. >>> >>> I'm assuming that you mean a non-SSD device here. >> >> Yes, it's spinning rust here. >> >>> >>> That would be handled via ata_port_suspend() I gather and whatever >>> that does should do the right thing. >>> >>> Do you think that the disk doesn't spin down or it spins down, but the >>> logic stays on? >> >> The spin sound is audible, so I am certain the HDD spins down during S2Idle. > > OK > >> How do I know if the logic is on or off? > > Well, if it were off, it would not draw power. :-) > > So IMO it is reasonable to assume that the logic on the drive stays > on. I'm not aware of anything that can be done to turn it off, > however. Okay, thanks for the info. I'll ask vendors the possibility to handle it at system firmware level. Kai-Heng ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-02-20 11:21 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-02-19 14:22 Hard Disk consumes lots of power in s2idle Kai-Heng Feng 2020-02-19 18:36 ` Srinivas Pandruvada 2020-02-20 8:08 ` Kai-Heng Feng 2020-02-20 10:12 ` Rafael J. Wysocki 2020-02-20 10:24 ` Kai-Heng Feng 2020-02-20 10:34 ` Rafael J. Wysocki 2020-02-20 11:21 ` Kai-Heng Feng
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