Linux-PM Archive on lore.kernel.org
 help / color / Atom feed
From: "Doug Smythies" <dsmythies@telus.net>
To: "'Srinivas Pandruvada'" <srinivas.pandruvada@linux.intel.com>
Cc: "'Linux Documentation'" <linux-doc@vger.kernel.org>,
	"'LKML'" <linux-kernel@vger.kernel.org>,
	"'Peter Zijlstra'" <peterz@infradead.org>,
	"'Giovanni Gherdovich'" <ggherdovich@suse.cz>,
	"'Francisco Jerez'" <francisco.jerez.plata@intel.com>,
	"'Linux PM'" <linux-pm@vger.kernel.org>,
	"'Rafael J. Wysocki'" <rjw@rjwysocki.net>
Subject: RE: [PATCH v4 0/2] cpufreq: intel_pstate: Implement passive mode with HWP enabled
Date: Sun, 2 Aug 2020 17:26:27 -0700
Message-ID: <000001d6692c$bc5605c0$35021140$@net> (raw)
In-Reply-To: <24a3011a9004bdbd7a37c029f9c2153f3db61476.camel@linux.intel.com>

Hi Srinivas,

Thanks for your help. I was missing several needed patches.

On 2020.08.02 11:39 Srinivas Pandruvada wrote:
> On Sun, 2020-08-02 at 07:00 -0700, Doug Smythies wrote:
> > On 2020.08.01 09:40 Srinivas Pandruvada wrote:
> > > > On Monday, July 27, 2020 5:13:40 PM CEST Rafael J. Wysocki wrote:
> > > > > On Thursday, July 16, 2020 7:37:04 PM CEST Rafael J. Wysocki
> > > > > wrote:
> > > > > > This really is a v2 of this patch:
> > > > > >
> > > > > > https://patchwork.kernel.org/patch/11663271/
> > > > > >
> > > > > > with an extra preceding cleanup patch to avoid making
> > > > > > unrelated
> > > > > > changes in the
> > > > > > [2/2].
> > > I applied this series along with
> > > [PATCH] cpufreq: intel_pstate: Fix EPP setting via sysfs in active
> > > mode
> > > on 5.8 latest master (On top of raw epp patchset).
> >
> > Would you be kind enough to provide a "git log --oneline" output
> > of what you did.
> 
> 69dd9b2b11cd (HEAD -> 5-9-devel) cpufreq: intel_pstate: Implement
> passive mode with HWP enabled
> 63efaa01b06a cpufreq: intel_pstate: Fix EPP setting via sysfs in active
> mode
> e11e0a2edf83 cpufreq: intel_pstate: Rearrange the storing of new EPP
> values
> 93c3fd6a315c cpufreq: intel_pstate: Avoid enabling HWP if EPP is not
> supported
> 7cef1dd371c3 cpufreq: intel_pstate: Clean up aperf_mperf_shift
> description
> a3248d8d3a11 cpufreq: intel_pstate: Supply struct attribute description
> for get_aperf_mperf_shift()
> f52b6b075b07 cpufreq: intel_pstate: Fix static checker warning for epp
> variable
> 4a59d6be0774 cpufreq: intel_pstate: Allow raw energy performance
> preference value
> 7b34b5acdcc6 cpufreq: intel_pstate: Allow enable/disable energy
> efficiency
> ac3a0c847296 (origin/master, origin/HEAD, master) Merge
> git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
> >
> > I have been trying unsuccessfully to apply the patches,
> > so somewhere I obviously missed something.
> >
> > > When intel_pstate=passive from kernel command line then it is fine,
> > > no
> > > crash. But switch dynamically, crashed:
> >
> > I'll try to repeat, if I can get an actual kernel.

I could not repeat your crash.

I tried booting with and without intel_pstate=passive
on the kernel command line and then switching back and
forth thereafter.

However, I do confirm EPP is messed up. But not min
and max from MSR 0x774, they behave as expected,
based on quick testing only.

Since you mentioned:

>>> Don't have a recipe to reproduce this.

Maybe I simply didn't hit whatever.

... Doug

Useless additional stuff:

# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.8.0-rc7-dssp root=UUID=0ac356c1-caa9-4c2e-8229-4408bd998dbd ro ipv6.disable=1 consoleblank=450 intel_pstate=passive cpuidle_sysfs_switch cpuidle.governor=teo

Went "active" then "passive" and set ondemand governor. 2 X 100% CPU loads:

# /home/doug/c/msr-decoder
How many CPUs?: 6
8.) 0x198: IA32_PERF_STATUS     : CPU 0-5 :  46 :  46 :  46 :  46 :  46 :  46 :
B.) 0x770: IA32_PM_ENABLE: 1 : HWP enable
1.) 0x19C: IA32_THERM_STATUS: 883C0000
2.) 0x1AA: MSR_MISC_PWR_MGMT: 401CC0 EIST enabled Coordination enabled OOB Bit 8 reset OOB Bit 18 reset
3.) 0x1B1: IA32_PACKAGE_THERM_STATUS: 882D0000
4.) 0x64F: MSR_CORE_PERF_LIMIT_REASONS: 0
A.) 0x1FC: MSR_POWER_CTL: 3C005D : C1E disable : EEO disable : RHO disable
5.) 0x771: IA32_HWP_CAPABILITIES (performance): 10B252E : high 46 : guaranteed 37 : efficient 11 : lowest 1
6.) 0x774: IA32_HWP_REQUEST:    CPU 0-5 :
    raw: FF002E0A : FF002E2E : FF002E2E : FF002E08 : FF002E18 : FF002E08 :
    min:       10 :       46 :       46 :        8 :       24 :        8 :
    max:       46 :       46 :       46 :       46 :       46 :       46 :
    des:        0 :        0 :        0 :        0 :        0 :        0 :
    epp:      255 :      255 :      255 :      255 :      255 :      255 :
    act:        0 :        0 :        0 :        0 :        0 :        0 :
7.) 0x777: IA32_HWP_STATUS: 4 : high 4 : guaranteed 0 : efficient 0 : lowest 0

Kernel:

d72c8472dbd5 (HEAD -> k58rc7-d3) cpufreq: intel_pstate: Fix EPP setting via sysfs in active mode
c2f4869fbc27 cpufreq: intel_pstate: Implement passive mode with HWP enabled
85219968fab9 cpufreq: intel_pstate: Rearrange the storing of new EPP values
5c09a1a38106 cpufreq: intel_pstate: Avoid enabling HWP if EPP is not supported
9f29c81fe0b3 cpufreq: intel_pstate: Clean up aperf_mperf_shift description
2a863c241495 cpufreq: intel_pstate: Supply struct attribute description for get_aperf_mperf_shift()
4180d8413037 cpufreq: intel_pstate: Fix static checker warning for epp variable
7cd50e86a9e6 cpufreq: intel_pstate: Allow raw energy performance preference value
56dce9a1081e cpufreq: intel_pstate: Allow enable/disable energy efficiency
92ed30191993 (tag: v5.8-rc7) Linux 5.8-rc7



  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-16 17:37 [PATCH v2 " Rafael J. Wysocki
2020-07-16 17:38 ` [PATCH v2 1/2] cpufreq: intel_pstate: Rearrange the storing of newv EPP values Rafael J. Wysocki
2020-07-16 17:42 ` [PATCH v2 2/2] cpufreq: intel_pstate: Implement passive mode with HWP enabled Rafael J. Wysocki
2020-07-27 15:13 ` [PATCH v3 0/2] " Rafael J. Wysocki
2020-07-27 15:15   ` [PATCH v3 1/2] cpufreq: intel_pstate: Rearrange the storing of new EPP values Rafael J. Wysocki
2020-07-27 15:17   ` [PATCH v3 2/2] cpufreq: intel_pstate: Implement passive mode with HWP enabled Rafael J. Wysocki
2020-07-28 15:09   ` [PATCH v4 0/2] " Rafael J. Wysocki
2020-07-28 15:11     ` [PATCH v4 1/2] cpufreq: intel_pstate: Rearrange the storing of new EPP values Rafael J. Wysocki
2020-07-30  1:31       ` Francisco Jerez
2020-07-28 15:13     ` [PATCH v4 2/2] cpufreq: intel_pstate: Implement passive mode with HWP enabled Rafael J. Wysocki
2020-08-01 23:21       ` Srinivas Pandruvada
2020-08-02 14:14         ` Doug Smythies
2020-08-02 19:20           ` Srinivas Pandruvada
2020-08-03 17:17       ` [PATCH v5] " Rafael J. Wysocki
2020-08-01 16:39     ` [PATCH v4 0/2] " Srinivas Pandruvada
2020-08-02 14:00       ` Doug Smythies
2020-08-02 18:39         ` Srinivas Pandruvada
2020-08-03  0:26           ` Doug Smythies [this message]
2020-08-03 17:23       ` Rafael J. Wysocki
2020-08-04 15:10   ` [PATCH v6] " Rafael J. Wysocki
2020-08-04 17:04     ` Doug Smythies
2020-08-05  9:34       ` Rafael J. Wysocki
2020-08-05 15:38         ` Srinivas Pandruvada
2020-08-05 16:28           ` Rafael J. Wysocki
2020-08-05 16:55   ` [PATCH v7] " Rafael J. Wysocki
2020-08-06  5:55     ` Doug Smythies
2020-08-06 11:25       ` Rafael J. Wysocki
2020-08-06 12:03     ` Rafael J. Wysocki
2020-08-10  0:44       ` Srinivas Pandruvada
2020-08-11  0:51       ` Francisco Jerez
2020-08-11 15:33         ` Rafael J. Wysocki
2020-08-17 21:06       ` Doug Smythies
2020-09-07  0:16         ` Doug Smythies

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='000001d6692c$bc5605c0$35021140$@net' \
    --to=dsmythies@telus.net \
    --cc=francisco.jerez.plata@intel.com \
    --cc=ggherdovich@suse.cz \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=peterz@infradead.org \
    --cc=rjw@rjwysocki.net \
    --cc=srinivas.pandruvada@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-PM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-pm/0 linux-pm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-pm linux-pm/ https://lore.kernel.org/linux-pm \
		linux-pm@vger.kernel.org
	public-inbox-index linux-pm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-pm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git