From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v2 3/6] x86/time: implement tsc as clocksource Date: Tue, 05 Apr 2016 09:12:44 -0600 Message-ID: <5703F20C02000078000E3414@prv-mh.provo.novell.com> References: <1459259051-4943-1-git-send-email-joao.m.martins@oracle.com> <1459259051-4943-4-git-send-email-joao.m.martins@oracle.com> <5703B30002000078000E320D@prv-mh.provo.novell.com> <5703D20F.6080407@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <5703D20F.6080407@oracle.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Joao Martins Cc: Andrew Cooper , Keir Fraser , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDA1LjA0LjE2IGF0IDE2OjU2LCA8am9hby5tLm1hcnRpbnNAb3JhY2xlLmNvbT4gd3Jv dGU6Cj4gT24gMDQvMDUvMjAxNiAxMTo0MyBBTSwgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4+IE9u IDI5LjAzLjE2IGF0IDE1OjQ0LCA8am9hby5tLm1hcnRpbnNAb3JhY2xlLmNvbT4gd3JvdGU6Cj4+ PiBAQCAtNTQxLDYgKzYxMywxMCBAQCBzdGF0aWMgaW50IF9faW5pdCB0cnlfcGxhdGZvcm1fdGlt ZXIoc3RydWN0IHBsYXRmb3JtX3RpbWVzb3VyY2UgKnB0cykKPj4+ICAgICAgaWYgKCByYyA8PSAw ICkKPj4+ICAgICAgICAgIHJldHVybiByYzsKPj4+ICAKPj4+ICsgICAgLyogV2UgaGF2ZSBhIHBs YXRmb3JtIHRpbWVzb3VyY2UgYWxyZWFkeSBzbyByZXNldCBpdCAqLwo+Pj4gKyAgICBpZiAoIHBs dF9zcmMuY291bnRlcl9iaXRzICE9IDAgKQo+Pj4gKyAgICAgICAgcmVzZXRfcGxhdGZvcm1fdGlt ZXIoKTsKPj4gCj4+IFdoYXQgaWYgYW55IG9mIHRoZSB0aW1lIGZ1bmN0aW9ucyBnZXQgdXNlZCBi ZXR3ZWVuIGhlcmUgYW5kIHRoZQo+PiBzZXR0aW5nIG9mIHRoZSBuZXcgY2xvY2sgc291cmNlPyBG b3IgZXhhbXBsZSwgd2hhdCB3aWxsIGhhcHBlbiB0bwo+PiBsb2cgbWVzc2FnZXMgd2hlbiAiY29u c29sZV90aW1lc3RhbXBzPS4uLiIgaXMgaW4gZWZmZWN0Pwo+IHRpbWUgZnVuY3Rpb25zIHdpbGwg dXNlIE5PVygpIChpLmUuIGdldF9zX3RpbWUpIHdoaWNoIHVzZXMgY3B1X3RpbWUgc3RydWN0cwo+ IGJlaW5nIHVwZGF0ZWQgb24gbG9jYWxfdGltZV9jYWxpYnJhdGlvbigpIG9yIGNwdSBmcmVxdWVu Y3kgY2hhbmdlcy4KPiByZXNldF9wbGF0Zm9ybV90aW1lcigpIHdpbGwgemVybyBvdXQgc29tZSBv ZiB0aGUgdmFyaWFibGVzIHVzZWQgYnkgdGhlCj4gcGx0X292ZXJmbG93IGFuZCByZWFkX3BsYXRm b3JtX3N0aW1lKCkuIFRoZSBvdmVyZmxvdyBhbmQgY2FsaWJyYXRpb24gaXNuJ3QgYW4KPiBpc3N1 ZSBhcyB0aGUgdGltZXJzIGFyZSBwcmV2aW91c2x5IGtpbGxlZCBzbyBhbnkgZnVydGhlciBjYWxs cyB3aWxsIHVzZSB3aGF0J3MKPiBvbiBjcHVfdGltZSB3aGlsZSBwbHRfc3JjIGlzIGJlaW5nIGNo YW5nZWQuCj4gCj4gVGhlIGNhc2UgSSBjb3VsZCBzZWUgdGhpcyBiZWluZyBkaWZmZXJlbnQgaXMg aWYgY3B1X2ZyZXF1ZW5jeV9jaGFuZ2UgaXMgY2FsbGVkCj4gYmV0d2VlbiByZXNldF9wbGF0Zm9y bV90aW1lKCkgYW5kIHRoZSBuZXh0IHVwZGF0ZSBvZiBzdGltZV9wbGF0Zm9ybV9zdGFtcC4gSW4K PiB0aGlzIHNpdHVhdGlvbiB0aGUgY2FsY3VsYXRpb24gd291bGQgZW5kIHVwIGEgYml0IGRpZmZl cmVudCBtZWFuaW5nIHN1YnNlcXVlbnQKPiBjYWxscyBvZiByZWFkX3BsYXRmb3JtX3N0aW1lKCkg d291bGQgcmV0dXJuIHRoZSBlcXVpdmFsZW50IHRvCj4gc2NhbGVfZGVsdGEocGx0X3NyYy0+cmVh ZF9jb3VudGVyKCksIHBsdF9zY2FsZSksIGFzIG9wcG9zZWQgdG8gY29tcHV0aW5nIHdpdGggYQo+ IHByZXZpb3VzIHRha2VuIHN0aW1lX3BsYXRmb3JtX3N0YW1wIGFuZCBpbmNyZW1lbnRpbmcgYSBk aWZmZXJlbmNlIHdpdGggYSBjb3VudGVyCj4gcmVhZC4gQnV0IGNhbiB0aGlzIHNpdHVhdGlvbiBh Y3R1YWxseSBoYXBwZW4/CgpObyBtYXR0ZXIgd2hpY2ggQ1BVIGZyZXEgbW9kZWwgaXMgYmVpbmcg dXNlZCAocmlnaHQgbm93LCBtYXkKY2hhbmdlIHdoZW4gdGhlIEludGVsIFAtc3RhdGUgZHJpdmVy IGZpbmFsbHkgYXJyaXZlcyksIERvbTAgaXMKcmVxdWlyZWQgdG8gYmUgZXhlY3V0aW5nIGFscmVh ZHksIHNvIG5vIGlzc3VlIGhlcmUuCgpTaW5jZSB5b3UgZGlkbid0IGdvIGludG8gYW55IGRldGFp bCBvbiB0aGUgc3BlY2lmaWMgZXhhbXBsZSBvZiBsb2cKdGltZSBzdGFtcHMgLSBhbSBJIHRvIGlt cGx5IHRoYXQgdGhleSdyZSBjb21wbGV0ZWx5IHVuYWZmZWN0ZWQgYnkKdGhpcyAoaS5lLiB0aGVy ZSdzIGFsc28gbm8gcmlzayBvZiB0aGVtIGdvaW5nIGJhY2t3YXJkcyBmb3IgYSBicmllZgpwZXJp b2Qgb2YgdGltZSk/CgpKYW4KCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3Jn Cmh0dHA6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=