From mboxrd@z Thu Jan 1 00:00:00 1970 From: Akshay Adiga Subject: Re: [PATCH 2/2] cpufreq: powernv: Ramp-down global pstate slower than local-pstate Date: Wed, 13 Apr 2016 23:27:51 +0530 Message-ID: <570E889F.2010401@linux.vnet.ibm.com> References: <1460484386-28389-1-git-send-email-akshay.adiga@linux.vnet.ibm.com> <1460484386-28389-3-git-send-email-akshay.adiga@linux.vnet.ibm.com> <20160413050310.GE19433@vireshk-i7> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20160413050310.GE19433@vireshk-i7> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" To: Viresh Kumar Cc: linuxppc-dev@lists.ozlabs.org, ego@linux.vnet.ibm.com, rjw@rjwysocki.net, linux-pm@vger.kernel.org List-Id: linux-pm@vger.kernel.org SGkgVmlyZXNoICwKClRoYW5rcyBmb3IgcmV2aWV3aW5nIGluIGRldGFpbC4KSSB3aWxsIGNvcnJl Y3QgYWxsIGNvbW1lbnRzIHJlbGF0ZWQgdG8gY29kaW5nIHN0YW5kYXJkcyBpbiBteSBuZXh0IHBh dGNoLgoKT24gMDQvMTMvMjAxNiAxMDozMyBBTSwgVmlyZXNoIEt1bWFyIHdyb3RlOgoKPiBDb21t ZW50cyBtb3N0bHkgb24gdGhlIGNvZGluZyBzdGFuZGFyZHMgd2hpY2ggeW91IGhhdmUgKm5vdCog Zm9sbG93ZWQuCj4KPiBBbHNvLCBwbGVhc2UgcnVuIGNoZWNrcGF0Y2ggLS1zdHJpY3QgbmV4dCB0 aW1lIHlvdSBzZW5kIHBhdGNoZXMKPiB1cHN0cmVhbS4KClRoYW5rcyBmb3IgcG9pbnRpbmcgb3V0 IHRoZSAtLXN0cmljdCBvcHRpb24sIHdhcyBub3QgYXdhcmUgb2YgdGhhdC4gSSB3aWxsCnJ1biBj aGVja3BhdGNoIC0tc3RyaWN0IG9uIHRoZSBuZXh0IHZlcnNpb25zLgoKPiBPbiAxMi0wNC0xNiwg MjM6MzYsIEFrc2hheSBBZGlnYSB3cm90ZToKPiArCj4gKy8qCj4gKyAqIFdoaWxlIHJlc2V0dGlu ZyB3ZSBkb24ndCB3YW50ICJ0aW1lciIgZmllbGRzIHRvIGJlIHNldCB0byB6ZXJvIGFzIHdlCj4g KyAqIG1heSBsb3NlIHRyYWNrIG9mIHRpbWVyIGFuZCB3aWxsIG5vdCBiZSBhYmxlIHRvIGNsZWFu bHkgcmVtb3ZlIGl0Cj4gKyAqLwo+ICsjZGVmaW5lIHJlc2V0X2dwc3RhdGVzKHBvbGljeSkgICBt ZW1zZXQocG9saWN5LT5kcml2ZXJfZGF0YSwgMCxcCj4gKwkJCQkJc2l6ZW9mKHN0cnVjdCBnbG9i YWxfcHN0YXRlX2luZm8pLVwKPiArCQkJCQlzaXplb2Yoc3RydWN0IHRpbWVyX2xpc3QpLVwKPiAr CQkJCQlzaXplb2Yoc3BpbmxvY2tfdCkpCj4gVGhhdCdzIHN1cGVyICp1Z2x5Ki4gV2h5IGRvbid0 IHlvdSBjcmVhdGUgYSBzaW1wbGUgcm91dGluZSB3aGljaCB3aWxsCj4gc2V0IHRoZSA1IGludGVn ZXIgdmFyaWFibGVzIHRvIDAgaW4gYSBzdHJhaWdodCBmb3J3YXJkIHdheSA/CgpZZWgsIHdpbGwg Y3JlYXRlIGEgcm91dGluZS4KCj4+IEBAIC0zNDgsMTQgKzM5NSwxNyBAQCBzdGF0aWMgdm9pZCBz ZXRfcHN0YXRlKHZvaWQgKmZyZXFfZGF0YSkKPj4gICAJdW5zaWduZWQgbG9uZyB2YWw7Cj4+ICAg CXVuc2lnbmVkIGxvbmcgcHN0YXRlX3VsID0KPj4gICAJCSgoc3RydWN0IHBvd2VybnZfc21wX2Nh bGxfZGF0YSAqKSBmcmVxX2RhdGEpLT5wc3RhdGVfaWQ7Cj4+ICsJdW5zaWduZWQgbG9uZyBncHN0 YXRlX3VsID0KPj4gKwkJKChzdHJ1Y3QgcG93ZXJudl9zbXBfY2FsbF9kYXRhICopIGZyZXFfZGF0 YSktPmdwc3RhdGVfaWQ7Cj4gUmVtb3ZlIHRoZXNlIHVubmVjZXNzYXJ5IGNhc3RzIGFuZCBkbzoK Pgo+IHN0cnVjdCBwb3dlcm52X3NtcF9jYWxsX2RhdGEgKmZyZXFfZGF0YSA9IGRhdGE7IC8vTmFt ZSBmdW5jIGFyZyBhcyBkYXRhCj4KPiBBbmQgdGhlbiB1c2UgZnJlcV9kYXRhLT4qLgoKT2suIFdp bGwgZG8gdGhhdC4KCj4+ICsvKgo+PiArICogZ3BzdGF0ZV90aW1lcl9oYW5kbGVyCj4+ICsgKgo+ PiArICogQGRhdGE6IHBvaW50ZXIgdG8gY3B1ZnJlcV9wb2xpY3kgb24gd2hpY2ggdGltZXIgd2Fz IHF1ZXVlZAo+PiArICoKPj4gKyAqIFRoaXMgaGFuZGxlciBicmluZ3MgZG93biB0aGUgZ2xvYmFs IHBzdGF0ZSBjbG9zZXIgdG8gdGhlIGxvY2FsIHBzdGF0ZQo+PiArICogYWNjb3JkaW5nIHF1YWRy YXRpYyBlcXVhdGlvbi4gUXVldWVzIGEgbmV3IHRpbWVyIGlmIGl0IGlzIHN0aWxsIG5vdCBlcXVh bAo+PiArICogdG8gbG9jYWwgcHN0YXRlCj4+ICsgKi8KPj4gK3ZvaWQgZ3BzdGF0ZV90aW1lcl9o YW5kbGVyKHVuc2lnbmVkIGxvbmcgZGF0YSkKPj4gK3sKPj4gKwlzdHJ1Y3QgY3B1ZnJlcV9wb2xp Y3kgKnBvbGljeSA9IChzdHJ1Y3QgY3B1ZnJlcV9wb2xpY3kgKikgZGF0YTsKPiBubyBuZWVkIHRv IGNhc3QuCgpNYXkgYmUgaSBuZWVkIGEgY2FzdCBoZXJlLCAgYmVjYXVzZSBkYXRhIGlzIHVuc2ln bmVkIGxvbmcgKCB1bmxpa2Ugb3RoZXIgcGxhY2VzIHdoZXJlIGl0cyB2b2lkICopLgpPbiBidWls ZGluZyB3aXRob3V0IGNhc3QsIGl0IHRocm93cyBtZSBhIHdhcm5pbmcuCgo+PiArCXN0cnVjdCBn bG9iYWxfcHN0YXRlX2luZm8gKmdwc3RhdGVzID0gKHN0cnVjdCBnbG9iYWxfcHN0YXRlX2luZm8g KikKPj4gKwlzdHJ1Y3QgcG93ZXJudl9zbXBfY2FsbF9kYXRhIGZyZXFfZGF0YTsKPj4gKwlpbnQg cmV0Owo+PiArCj4+ICsJcmV0ID0gc3Bpbl90cnlsb2NrKCZncHN0YXRlcy0+Z3BzdGF0ZV9sb2Nr KTsKPiBubyBuZWVkIG9mICdyZXQnIGZvciBqdXN0IHRoaXMsIHNpbXBseSBkbzogaWYgKCFzcGlu X3RyeWxvY2soKSkuLi4KClN1cmUgd2lsbCBkbyB0aGF0LgoKPiBhCj4+ICsJaWYgKCFyZXQpCj4+ ICsJCXJldHVybjsKPj4gKwo+PiArCWdwc3RhdGVzLT5sYXN0X3NhbXBsZWRfdGltZSArPSB0aW1l X2RpZmY7Cj4+ICsJZ3BzdGF0ZXMtPmVsYXBzZWRfdGltZSArPSB0aW1lX2RpZmY7Cj4+ICsJZnJl cV9kYXRhLnBzdGF0ZV9pZCA9IGdwc3RhdGVzLT5sYXN0X2xwc3RhdGU7Cj4+ICsJaWYgKChncHN0 YXRlcy0+bGFzdF9ncHN0YXRlID09IGZyZXFfZGF0YS5wc3RhdGVfaWQpIHx8Cj4+ICsJCQkoZ3Bz dGF0ZXMtPmVsYXBzZWRfdGltZSA+IE1BWF9SQU1QX0RPV05fVElNRSkpIHsKPj4gKwkJZnJlcV9k YXRhLmdwc3RhdGVfaWQgPSBmcmVxX2RhdGEucHN0YXRlX2lkOwo+PiArCQlyZXNldF9ncHN0YXRl cyhwb2xpY3kpOwo+PiArCQlncHN0YXRlcy0+aGlnaGVzdF9scHN0YXRlID0gZnJlcV9kYXRhLnBz dGF0ZV9pZDsKPj4gKwl9IGVsc2Ugewo+PiArCQlmcmVxX2RhdGEuZ3BzdGF0ZV9pZCA9IGNhbGN1 bGF0ZV9nbG9iYWxfcHN0YXRlKAo+IFlvdSBjYW4ndCBicmVhayBhIGxpbmUgYWZ0ZXIgKCBvZiBh IGZ1bmN0aW9uIGNhbGwgOikKPgo+IExldCBpdCBnbyBiZXlvbmQgODAgY29sdW1ucyBpZiBpdCBo YXMgdG8uCgpNYXkgYmUgaSB3aWxsIHRyeSB0byBnZXQgaXQgaW5zaWRlIDgwIGNvbHVtbnMgd2l0 aCBhIHRlbXBvcmFyeSB2YXJpYWJsZSBpbnN0ZWFkIG9mCmZyZXFfZGF0YS5ncHN0YXRlX2lkLgoK Pj4gKwkJCWdwc3RhdGVzLT5lbGFwc2VkX3RpbWUsIGdwc3RhdGVzLT5oaWdoZXN0X2xwc3RhdGUs Cj4+ICsJCQlmcmVxX2RhdGEucHN0YXRlX2lkKTsKPj4gKwl9Cj4+ICsKPj4gKwkvKiBJZiBsb2Nh bCBwc3RhdGUgaXMgZXF1YWwgdG8gZ2xvYmFsIHBzdGF0ZSwgcmFtcGRvd24gaXMgb3Zlcgo+IEJh ZCBzdHlsZSBhZ2Fpbi4KPgo+PiArCSAqIFNvIHRpbWVyIGlzIG5vdCByZXF1aXJlZCB0byBiZSBx dWV1ZWQuCj4+ICsJICovCj4+ICsJaWYgKGZyZXFfZGF0YS5ncHN0YXRlX2lkICE9IGZyZXFfZGF0 YS5wc3RhdGVfaWQpCj4+ICsJCXJldCA9IHF1ZXVlX2dwc3RhdGVfdGltZXIoZ3BzdGF0ZXMpOwo+ IHJldCBub3QgdXNlZC4KClNob3VsZCBpIG1ha2UgaXQgdm9pZCBpbnN0ZWFkIG9mIHJldHVybmlu ZyBpbnQ/LCBhcyBpIGNhbm5vdCBkbyBtdWNoIGV2ZW4gaWYgaXQgZmFpbHMsIGV4Y2VwdCBmb3Ig bm90aWZ5aW5nLgoKPj4gK2dwc3RhdGVzX2RvbmU6Cj4+ICsJZ3BzdGF0ZXMtPmxhc3Rfc2FtcGxl ZF90aW1lID0gY3VyX21zZWM7Cj4+ICsJZ3BzdGF0ZXMtPmxhc3RfZ3BzdGF0ZSA9IGZyZXFfZGF0 YS5ncHN0YXRlX2lkOwo+PiArCWdwc3RhdGVzLT5sYXN0X2xwc3RhdGUgPSBmcmVxX2RhdGEucHN0 YXRlX2lkOwo+PiArCj4+ICAgCS8qCj4+ICAgCSAqIFVzZSBzbXBfY2FsbF9mdW5jdGlvbiB0byBz ZW5kIElQSSBhbmQgZXhlY3V0ZSB0aGUKPj4gICAJICogbXRzcHIgb24gdGFyZ2V0IENQVS4gIFdl IGNvdWxkIGRvIHRoYXQgd2l0aG91dCBJUEkKPj4gICAJICogaWYgY3VycmVudCBDUFUgaXMgd2l0 aGluIHBvbGljeS0+Y3B1cyAoY29yZSkKPj4gICAJICovCj4+ICAgCXNtcF9jYWxsX2Z1bmN0aW9u X2FueShwb2xpY3ktPmNwdXMsIHNldF9wc3RhdGUsICZmcmVxX2RhdGEsIDEpOwo+PiArCXNwaW5f dW5sb2NrX2lycXJlc3RvcmUoJmdwc3RhdGVzLT5ncHN0YXRlX2xvY2ssIGZsYWdzKTsKPj4gKwly ZXR1cm4gMDsKPj4gK30KPj4gICAKPj4gK3N0YXRpYyBpbnQgcG93ZXJudl9jcHVmcmVxX2NwdV9l eGl0KHN0cnVjdCBjcHVmcmVxX3BvbGljeSAqcG9saWN5KQo+IEFkZCB0aGlzIGFmdGVyIHRoZSBp bml0KCkgcm91dGluZS4KCk9rIHdpbGwgZG8gaXQuCgo+PiArCXBvbGljeS0+ZHJpdmVyX2RhdGEg PSBncHN0YXRlczsKPj4gKwo+PiArCS8qIGluaXRpYWxpemUgdGltZXIgKi8KPj4gKwlpbml0X3Rp bWVyX2RlZmVycmFibGUoJmdwc3RhdGVzLT50aW1lcik7Cj4+ICsJZ3BzdGF0ZXMtPnRpbWVyLmRh dGEgPSAodW5zaWduZWQgbG9uZykgcG9saWN5Owo+PiArCWdwc3RhdGVzLT50aW1lci5mdW5jdGlv biA9IGdwc3RhdGVfdGltZXJfaGFuZGxlcjsKPj4gKwlncHN0YXRlcy0+dGltZXIuZXhwaXJlcyA9 IGppZmZpZXMgKwo+PiArCQkJCW1zZWNzX3RvX2ppZmZpZXMoR1BTVEFURV9USU1FUl9JTlRFUlZB TCk7Cj4+ICsKPj4gKwlwcl9pbmZvKCJBZGRlZCBnbG9iYWxfcHN0YXRlX2luZm8gJiB0aW1lciBm b3IgJWQgY3B1XG4iLCBiYXNlKTsKPj4gICAJcmV0dXJuIGNwdWZyZXFfdGFibGVfdmFsaWRhdGVf YW5kX3Nob3cocG9saWN5LCBwb3dlcm52X2ZyZXFzKTsKPiBXaG8gd2lsbCBmcmVlIGdwc3RhdGVz IGlmIHRoaXMgZmFpbHMgPwoKVGhhbmtzIGZvciBwb2ludGluZyBvdXQuIFdpbGwgZml4IGluIHYy LgoKUmVnYXJkcwpBa3NoYXkgQWRpZ2EKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fCkxpbnV4cHBjLWRldiBtYWlsaW5nIGxpc3QKTGludXhwcGMtZGV2QGxp c3RzLm96bGFicy5vcmcKaHR0cHM6Ly9saXN0cy5vemxhYnMub3JnL2xpc3RpbmZvL2xpbnV4cHBj LWRldg==