From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: Re: intel-pstate driver not clocking down on Atom Z8750 Date: Sun, 25 Jun 2017 17:27:59 -0700 Message-ID: <1498436879.4671.22.camel@linux.intel.com> References: <13898444.q12oX9ZNe5@aspire.rjw.lan> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-wO36Z6Kx7MDbTGysOpDE" Return-path: Received: from mga01.intel.com ([192.55.52.88]:9359 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751689AbdFZA2B (ORCPT ); Sun, 25 Jun 2017 20:28:01 -0400 In-Reply-To: Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Christopher Williamson , "Rafael J. Wysocki" Cc: "lenb@kernel.org" , "viresh.kumar@linaro.org" , "linux-pm@vger.kernel.org" , Hans de Goede --=-wO36Z6Kx7MDbTGysOpDE Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit On Sun, 2017-06-25 at 18:37 -0400, Christopher Williamson wrote: > 4.8 and 4.12-rc6 > I just gave a quick test on a HP Cherrytrail laptop with 4.12 tip. Attached is the output, which show that this does scale. It is possible that you don't have any idle (C-states) or some task is keeping system busy. I suggest: 1. Run turbostat and attach output. 2. Attach output of tools/power/x86/intel_pstate_tracer for a minute run. Thanks, Srinivas > On Jun 25, 2017 at 10:24 PM, "Rafael J. Wysocki" > wrote:  > > On Sunday, June 25, 2017 03:39:11 PM Christopher Williamson wrote: > > > Hi there, > > > > > > I've just purchased a device called a "GPD Pocket" (more info at > > > indiegogo.com/projects/gpd-pocket-7-0-umpc-laptop-ubuntu-or-win- > > 10-os-laptop--2/x/7959405) > > > but in short - one of the major problems I have with the device > > is that the > > > included Intel Atom Z8750 never clocks below the turbo boost > > speed meaning > > > it overheats very quickly and crashes. > > > > > > I have managed to avoid this behaviour in two ways: > > > > > > 1.) Disable turbo boost - the device then sits firmly at 1.6GHz > > and refuses > > > to clock below that. > > > > > > 2.) Disable the intel_pstate driver and the CPU then clocks > > properly but > > > cannot turbo boost at all so I lose that capability. > > > > > > I'm really just reaching out to you fine folks to find out where > > best to > > > discuss this issue. I'm happy to raise a kernel bug report if > > that helps > > > and also happy to provide command outputs as needed. > > > > > > I have included Hans de Goede in the CC list on this email since > > he has > > > been a great help getting to this point - this device has a few > > strange > > > quirks to work through but this is a fairly serious one. > > > > What kernel versions have you tried? > > > > Thanks, > > Rafael > > > > > > --=-wO36Z6Kx7MDbTGysOpDE Content-Disposition: attachment; filename="cht_turbostat.txt" Content-Type: text/plain; name="cht_turbostat.txt"; charset="UTF-8" Content-Transfer-Encoding: base64 W3Rlc3R1c2VyQG90Y3BsLWhwLWNodC1mZWRvcmEgdHVyYm9zdGF0XSQgc3VkbyB0dXJib3N0YXQg LS1zaG93IENvcmUsQ1BVLEF2Z19NSHosQnVzeSUsQnp5X01IeixUU0NfTUh6CnR1cmJvc3RhdCB2 ZXJzaW9uIDE3LjA0LjEyIC0gTGVuIEJyb3duIDxsZW5iQGtlcm5lbC5vcmc+CkNQVUlEKDApOiBH ZW51aW5lSW50ZWwgMTEgQ1BVSUQgbGV2ZWxzOyBmYW1pbHk6bW9kZWw6c3RlcHBpbmcgMHg2OjRj OjMgKDY6NzY6MykKQ1BVSUQoMSk6IFNTRTMgTU9OSVRPUiAtIEVJU1QgVE0yIFRTQyBNU1IgQUNQ SS1UTSBUTQpDUFVJRCg2KTogQVBFUkYsIFRVUkJPLCBEVFMsIE5vLVBUTSwgTm8tSFdQLCBOby1I V1Bub3RpZnksIE5vLUhXUHdpbmRvdywgTm8tSFdQZXBwLCBOby1IV1Bwa2csIEVQQgpjcHUzOiBN U1JfSUEzMl9NSVNDX0VOQUJMRTogMHgwMDg1MDA4OSAoVENDIEVJU1QgTm8tTVdBSVQgUFJFRkVU Q0ggVFVSQk8pCkNQVUlEKDcpOiBOby1TR1gKY3B1MzogTVNSX1BMQVRGT1JNX0lORk86IDB4NjAw MDYwMDE0MDAKNiAqIDEzMy4zID0gODAwLjAgTUh6IG1heCBlZmZpY2llbmN5IGZyZXF1ZW5jeQoy MCAqIDEzMy4zID0gMjY2Ni42IE1IeiBiYXNlIGZyZXF1ZW5jeQpjcHUzOiBNU1JfSUEzMl9QT1dF Ul9DVEw6IDB4MDAwMDAwMDAgKEMxRSBhdXRvLXByb21vdGlvbjogRElTYWJsZWQpCmNwdTM6IE1T Ul9UVVJCT19SQVRJT19MSU1JVDogMHgwMDAwMDAwMApjcHUzOiBNU1JfUEtHX0NTVF9DT05GSUdf Q09OVFJPTDogMHgwMDA2MDAwZiAoVU5sb2NrZWQ6IHBrZy1jc3RhdGUtbGltaXQ9MTU6IHVua25v d24pCmNwdTM6IGNwdWZyZXEgZHJpdmVyOiBpbnRlbF9wc3RhdGUKY3B1MzogY3B1ZnJlcSBnb3Zl cm5vcjogcG93ZXJzYXZlCmNwdWZyZXEgaW50ZWxfcHN0YXRlIG5vX3R1cmJvOiAwCmNwdTA6IE1T Ul9JQTMyX0VORVJHWV9QRVJGX0JJQVM6IDB4MDAwMDAwMDYgKGJhbGFuY2VkKQpjcHUwOiBNU1Jf SUEzMl9URU1QRVJBVFVSRV9UQVJHRVQ6IDB4MDM1YTAwMDAgKDkwIEMpCkNvcmUJQ1BVCUF2Z19N SHoJQnVzeSUJQnp5X01IeglUU0NfTUh6Ci0JLQk2CTEuMDQJOTI1CTE2MDAKMAkwCTgJMS40Nwk5 MTMJMTYwMAoxCTEJOAkxLjM5CTk1MQkxNjAwCjIJMgkyCTAuMzQJODU2CTE2MDAKMwkzCTUJMC45 Nwk5MjgJMTYwMApDb3JlCUNQVQlBdmdfTUh6CUJ1c3klCUJ6eV9NSHoJVFNDX01IegotCS0JNwkx LjExCTExMDkJMTYwMAowCTAJMTUJMi4xMgkxMjE3CTE2MDAKMQkxCTEyCTEuOTEJMTA1NQkxNjAw CjIJMgkxCTAuMTIJODAwCTE2MDAKMwkzCTEJMC4zMAk4MDAJMTYwMApDb3JlCUNQVQlBdmdfTUh6 CUJ1c3klCUJ6eV9NSHoJVFNDX01IegotCS0JMwkwLjUzCTk2NAkxNjAwCjAJMAk3CTEuMTMJMTAw NgkxNjAwCjEJMQkzCTAuNDYJMTA0OQkxNjAwCjIJMgkwCTAuMTAJODAwCTE2MDAKMwkzCTIJMC40 Mwk4MDAJMTYwMApDb3JlCUNQVQlBdmdfTUh6CUJ1c3klCUJ6eV9NSHoJVFNDX01IegotCS0JNgkx LjA2CTk2NAkxNjAwCjAJMAkxMQkxLjk2CTk1NAkxNjAwCjEJMQk5CTEuMzgJMTAzNQkxNjAwCjIJ MgkxCTAuMjcJODg0CTE2MDAKMwkzCTMJMC42MQk4NzMJMTYwMApDb3JlCUNQVQlBdmdfTUh6CUJ1 c3klCUJ6eV9NSHoJVFNDX01IegotCS0JMjEJMi4wMwkxNzE3CTE2MDAKMAkwCTIyCTIuODgJMTI5 NQkxNjAwCjEJMQkzNAkyLjgxCTE5OTUJMTYwMAoyCTIJMTMJMS4wOAkyMDI1CTE2MDAKMwkzCTE0 CTEuMzQJMTc5OAkxNjAwCkNvcmUJQ1BVCUF2Z19NSHoJQnVzeSUJQnp5X01IeglUU0NfTUh6Ci0J LQk4OAk4LjE2CTE4MDAJMTYwMAowCTAJNzUJOS42NAkxMjk2CTE2MDAKMQkxCTc2CTcuODYJMTYx NwkxNjAwCjIJMgkxMDAJNy41MwkyMjE3CTE2MDAKMwkzCTEwMQk3LjYxCTIyMTYJMTYwMApDb3Jl CUNQVQlBdmdfTUh6CUJ1c3klCUJ6eV9NSHoJVFNDX01IegotCS0JMTA1CTguNDQJMjA2OAkxNjAw CjAJMAkyMjgJMTUuNTAJMjQ1MQkxNjAwCjEJMQkxNTEJMTIuMjEJMjA2NwkxNjAwCjIJMgkxMwky LjI5CTk1NQkxNjAwCjMJMwkyNgkzLjc0CTExNTgJMTYwMApDb3JlCUNQVQlBdmdfTUh6CUJ1c3kl CUJ6eV9NSHoJVFNDX01IegotCS0JNDE1CTI1LjM0CTI3MzAJMTYwMAowCTAJMzg4CTIyLjg0CTI4 MzIJMTYwMAoxCTEJNTc1CTMzLjkzCTI4MjMJMTYwMAoyCTIJNDM4CTI2LjI3CTI3ODEJMTYwMAoz CTMJMjU5CTE4LjMzCTIzNTkJMTYwMApDb3JlCUNQVQlBdmdfTUh6CUJ1c3klCUJ6eV9NSHoJVFND X01IegotCS0JMzgJNC4zOAkxNDQxCTE2MDAKMAkwCTY5CTcuMDcJMTYzMQkxNjAwCjEJMQk0MQk0 LjU4CTE0NzkJMTYwMAoyCTIJMzYJNC44NQkxMjQyCTE2MDAKMwkzCTUJMS4wMQk4OTYJMTYwMApD b3JlCUNQVQlBdmdfTUh6CUJ1c3klCUJ6eV9NSHoJVFNDX01IegotCS0JMTQJMS4yMQkxODU0CTE2 MDAKMAkwCTgJMS4xMgkxMjQ2CTE2MDAKMQkxCTE0CTEuMTYJMjA1MgkxNjAwCjIJMgkyMAkxLjUy CTIxNzkJMTYwMAozCTMJMTIJMS4wNwkxODE2CTE2MDAKQ29yZQlDUFUJQXZnX01IeglCdXN5JQlC enlfTUh6CVRTQ19NSHoKLQktCTIxCTMuMTMJMTExNgkxNjAwCjAJMAkxOAkyLjUxCTEyMjEJMTYw MAoxCTEJNAkwLjY1CTExMDUJMTYwMAoyCTIJMjAJMy4zOAkxMDA3CTE2MDAKMwkzCTQxCTUuOTkJ MTEzNAkxNjAwCkNvcmUJQ1BVCUF2Z19NSHoJQnVzeSUJQnp5X01IeglUU0NfTUh6Ci0JLQkyMzIJ MTcuNDgJMjIxMgkxNjAwCjAJMAkyNDUJMTguODUJMjE2NgkxNjAwCjEJMQkxNjMJMTMuMjkJMjA0 MAkxNjAwCjIJMgkyNzAJMTkuNTEJMjMwNQkxNjAwCjMJMwkyNTAJMTguMjYJMjI4NAkxNjAwCkNv cmUJQ1BVCUF2Z19NSHoJQnVzeSUJQnp5X01IeglUU0NfTUh6Ci0JLQk2Nwk3LjA1CTE1ODIJMTYw MAowCTAJNzEJOC45MwkxMzMzCTE2MDAKMQkxCTQ5CTQuMDEJMjAyNAkxNjAwCjIJMgk5Mwk4LjU3 CTE4MDcJMTYwMAozCTMJNTUJNi42OQkxMzY0CTE2MDAKQ29yZQlDUFUJQXZnX01IeglCdXN5JQlC enlfTUh6CVRTQ19NSHoKLQktCTI0CTMuNzAJMTA3MgkxNjAwCjAJMAkzMwk1LjcyCTk2MAkxNjAw CjEJMQkxNQkyLjc1CTg5MQkxNjAwCjIJMgkyNAkzLjQ2CTExNTIJMTYwMAozCTMJMjQJMi44Nwkx Mzc0CTE2MDAKCg== --=-wO36Z6Kx7MDbTGysOpDE--