From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: Ping: [PATCH 0/5] x86: more power-efficient CPU parking Date: Wed, 03 Apr 2019 06:43:12 -0600 Message-ID: <5CA4AA600200007800224448@prv1-mh.provo.novell.com> References: <5B61C21202000078001D9F2D@prv1-mh.provo.novell.com> <5B61C21202000000000FC1F1@prv1-mh.provo.novell.com> <5B61C21202000078001F8805@prv1-mh.provo.novell.com> <5B61C21202000000000FC6BD@prv1-mh.provo.novell.com> <5B61C212020000780020B6D8@prv1-mh.provo.novell.com> <5B61C21202000000000FF27E@prv1-mh.provo.novell.com> <5B61C2120200007800224310@prv1-mh.provo.novell.com> <5CA4870A0200007800224351@prv1-mh.provo.novell.com> <6dab54cd-0246-2dff-42dd-93477c7c19e3@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hBfEb-0004G2-2O for xen-devel@lists.xenproject.org; Wed, 03 Apr 2019 12:43:17 +0000 In-Reply-To: <6dab54cd-0246-2dff-42dd-93477c7c19e3@citrix.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Andrew Cooper Cc: xen-devel , Wei Liu , Roger Pau Monne List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDAzLjA0LjE5IGF0IDEzOjE0LCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3Jv dGU6Cj4gT24gMDMvMDQvMjAxOSAxMToxMiwgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4+IE9uIDAx LjA4LjE4IGF0IDE2OjIyLCAgd3JvdGU6Cj4+PiBXaGVuIHB1dHRpbmcgQ1BVcyB0byBzbGVlcCBw ZXJtYW5lbnRseSwgd2Ugc2hvdWxkIHRyeSB0byBwdXQgdGhlbSBpbnRvCj4+PiB0aGUgbW9zdCBw b3dlciBjb25zZXJ2aW5nIHN0YXRlIHBvc3NpYmxlLiBGb3Igbm93IGl0IGlzIHVuY2xlYXIgd2hl dGhlciwKPj4+IGVzcGVjaWFsbHkgaW4gYSBkZWVwIEMtc3RhdGUsIHRoZSBQLXN0YXRlIGFsc28g bWF0dGVycywgc28gdGhpcyBzZXJpZXMgb25seQo+Pj4gYXJyYW5nZXMgZm9yIHRoZSBDLXN0YXRl IHNpZGUgb2YgdGhpbmdzIChwbHVzIHNvbWUgY2xlYW51cCkuCj4+Pgo+Pj4gMTogeDg2L2NwdWlk bGU6IHJlcGxhY2UgYSBwb2ludGxlc3MgTlVMTCBjaGVjawo+Pj4gMjogeDg2L2lkbGU6IHJlLWFy cmFuZ2UgZGVhZC1pZGxlIGhhbmRsaW5nCj4+PiAzOiB4ODYvY3B1aWRsZTogcHVzaCBwYXJrZWQg Q1BVcyBpbnRvIGRlZXBlciBzbGVlcCBzdGF0ZXMgd2hlbiBwb3NzaWJsZQo+Pj4gNDogeDg2L2Nw dWlkbGU6IGNsZWFuIHVwIEN4IGR1bXBpbmcKPj4+IDU6IHg4NjogcGxhY2Ugbm9uLXBhcmtlZCBD UFVzIGludG8gd2FpdC1mb3ItU0lQSSBzdGF0ZSBhZnRlciBvZmZsaW5pbmcKPj4gU28gcGF0Y2gg NSBpcyB1bmRlcnN0YW5kYWJseSBjb250cm92ZXJzaWFsLCBhbmQgSSdtIGV4cGxpY2l0bHkKPj4g ZXhjbHVkaW5nIGl0IGZyb20gdGhlIHBpbmcuCj4gCj4gQ29uc2lkZXJpbmcgdGhhdCBpdCBjYXVz ZXMgRUZJIGZpcm13YXJlIHRvIGV4cGxvZGUgaW4gc2V2ZXJhbAo+IGludGVyZXN0aW5nIHdheXMs IEknbSBhZnJhaWQgaXQgaXMgYSBjb21wbGV0ZSBub25zdGFydGVyLgoKSSBkaWRuJ3Qga25vdyB0 aGlzIC0gbmVpdGhlciBvZiBteSB0d28gRUZJIGJveGVzIGhhdmUgZXhwbG9kZWQgaW4KYW55IHdh eSBkdXJpbmcgdGhlIGxhc3QgaGFsZiB5ZWFyLiBDYXJlIHRvIHNoYXJlIGRldGFpbHM/Cgo+PiBQ YXRjaCAxIGhhcyBnb25lIGluIGxvbmcgYWdvIGFuZAo+PiBwYXRjaCA0IGhhcyBiZWVuIGFja2Vk LiBXaGlsZSB0aGVyZSB3YXMgc29tZSBmZWVkYmFjayBvbgo+PiAyIChhbGJlaXQgc3RhbGxlZCB0 aGVuIGFmdGVyIG15IHJlcGx5KSwgSSBkb24ndCB0aGluayBJJ3ZlIGhhZCBhbnkKPj4gc3Vic3Rh bnRpYWwgZmVlZGJhY2sgb24gMyB0aG91Z2gsIHlldCBfdGhleV8gYXJlIHN1cHBvc2VkIHRvCj4+ IHByb3ZpZGUgdGhlIG1haW4gaW1wcm92ZW1lbnQgaGVyZS4gUGF0Y2ggNSByZWFsbHkgd2FzIG1l YW50Cj4+IHRvIGJlIG1vcmUgb3B0aW9uYWwgdGhhbiBJIGhhZCBleHByZXNzZWQsIGhlbmNlIGl0 cyBwbGFjZW1lbnQKPj4gZXZlbiBhZnRlciB0aGUgcHVyZSBjbGVhbnVwIHBhdGNoIDQuCj4gCj4g U29tZSBvZiB0aGUgcGF0Y2hlcyBoYXZlIGN5Y2xlZCBvdXQgb2YgbXkgaW5ib3gsIHNvIEknbSBy ZXZpZXdpbmcgZnJvbQo+IHRoZSBtYWlsIGFyY2hpdmUuCj4gCj4gMikgTm93IHRoYXQgZGVmYXVs dF9kZWFkX2lkbGUoKSBpc24ndCBhIHRlcm1pbmFsIGZ1bmN0aW9uLCB5b3UgbXVzdCB1c2UKPiBz cGVjX2N0cmxfZW50ZXJfaWRsZSgpIG9uIHRoZSB3YXkgYmFjayBvdXQgZm9yIHNhZmV0eS4KCkFo LCB5ZXMsIHBlcmhhcHMgYmV0dGVyIHRvIGFkZCBpdCwgdGhhbiB0byBpbXBsaWNpdGx5IHJlbHkg b24gY2FsbGVycwoodGhlcmUncyByZWFsbHkgZXhhY3RseSBvbmUpIHRvIGJlIHRlcm1pbmFsLiAo SSB0YWtlIGl0IHlvdSBtZWFuCnNwZWNfY3RybF9leGl0X2lkbGUoKS4pCgo+IEknbSBzdGlsbCBn b2luZyB0byBpbnNpc3Qgb24gc29tZXRoaW5nIGFib3V0ICNNQywgZXZlbiBpZiBpdCBpcyBqdXN0 IGEKPiBub3RlIGluIHRoZSBjb21taXQgbWVzc2FnZSBzYXlpbmcgInRoaXMgZG9lc24ndCB5ZXQg bWFrZSAjTUMgYW55IHNhZmVyCj4gZm9yIHBhcmtlZCBDUFVzIi4KCkkgY2FuIGFkZCBzb21ldGhp bmcgbGlrZSB0aGlzLCBidXQgd2hhdCBpcyBpdCB0aGF0J3Mga25vd24gdW5zYWZlCmZvciBwYXJr ZWQgQ1BVcz8gVGhleSBpbiBwYXJ0aWN1bGFyIHJldGFpbiB0aGVpciBwZXItQ1BVIGRhdGEuIElm CmFueXRoaW5nIEkgc2VlIGEgcHJvYmxlbSB3aXRoIGZ1bGx5IG9mZmxpbmUgQ1BVcy4gRm9yIG5v dyBJJ2xsIGFkZAphIHNpbWlsYXIgc2VudGVuY2UsIGJ1dCB3aXRoICJwYXJrZWQiIHJlcGxhY2Vk LgoKT25lIG90aGVyIHF1ZXN0aW9uIChJIGFwcGFyZW50bHkgZm9yZ290IGFib3V0IHRoaXMgYXNw ZWN0CmJldHdlZW4gcHV0dGluZyB0b2dldGhlciB0aGUgc2VyaWVzIGFuZCBwb3N0aW5nIGl0KToK YWNwaV9kZWFkX2lkbGUoKSBoYXMgYnVpbHQtaW4gbG9vcHMgYXMgd2VsbC4gV2hpbGUgaXQncyBu b3QKZXhwZWN0ZWQgZm9yIGEgQ1BVIHRvIG5lZWQgd2FraW5nIGZyb20gdGhlcmUgKGFzIG5vICJl dmVuCmJldHRlciIgZGVhZC1pZGxlIGhhbmRsZXIgY291bGQgZ2V0IGluc3RhbGxlZCkgSSB3b25k ZXIgd2hldGhlcgpmb3IgY29uc2lzdGVuY3kgd2Ugd291bGRuJ3QgYmV0dGVyIGRyb3AgdGhlIGxv b3BzIHRoZXJlIHRvby4KVGhlIGRvd25zaWRlIG9mIGRvaW5nIHNvIHdvdWxkIGJlIGFkZGVkIG92 ZXJoZWFkIGluIGNhc2UKb2Ygc3B1cmlvdXMgd2FrZXVwcyAod2hpY2ggb3VnaHQgdG8gaGF2ZSBh IHNtYWxsIGNoYW5jZSBvZgpiZWluZyBwb3NzaWJsZSBpbiBwYXJ0aWN1bGFyIGluIHRoZSBNV0FJ VCBjYXNlKS4KCj4gMykgQWNrZWQtYnk6IEFuZHJldyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNp dHJpeC5jb20+CgpUaGFua3MhCgpKYW4KCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3Rp bmZvL3hlbi1kZXZlbA==