From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joao Martins Subject: Re: [PATCH 2/5] x86/time: implement tsc as clocksource Date: Tue, 22 Mar 2016 20:40:54 +0000 Message-ID: <56F1ADD6.8030400@oracle.com> References: <1458231136-13457-1-git-send-email-joao.m.martins@oracle.com> <1458231136-13457-3-git-send-email-joao.m.martins@oracle.com> <56EC6335.7010502@citrix.com> <56F13D92.1030704@oracle.com> <56F14CA202000078000DF28B@prv-mh.provo.novell.com> <56F169F7.3080700@oracle.com> <56F17AAD02000078000DF469@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <56F17AAD02000078000DF469@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: Andrew Cooper , Keir Fraser , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org CgpPbiAwMy8yMi8yMDE2IDA0OjAyIFBNLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+PiBPbiAyMi4w My4xNiBhdCAxNjo1MSwgPGpvYW8ubS5tYXJ0aW5zQG9yYWNsZS5jb20+IHdyb3RlOgo+IAo+Pgo+ PiBPbiAwMy8yMi8yMDE2IDEyOjQ2IFBNLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+IE9uIDIy LjAzLjE2IGF0IDEzOjQxLCA8am9hby5tLm1hcnRpbnNAb3JhY2xlLmNvbT4gd3JvdGU6Cj4+Pgo+ Pj4+Cj4+Pj4gT24gMDMvMTgvMjAxNiAwODoyMSBQTSwgQW5kcmV3IENvb3BlciB3cm90ZToKPj4+ Pj4gT24gMTcvMDMvMTYgMTY6MTIsIEpvYW8gTWFydGlucyB3cm90ZToKPj4+Pj4+IEludHJvZHVj ZSBzdXBwb3J0IGZvciB1c2luZyBUU0MgYXMgcGxhdGZvcm0gdGltZSB3aGljaCBpcyB0aGUgaGln aGVzdAo+Pj4+Pj4gcmVzb2x1dGlvbiB0aW1lIGFuZCBtb3N0IHBlcmZvcm1hbnQgdG8gZ2V0ICh+ MjAgbnNlY3MpLiAgVGhvdWdoIHRoZXJlCj4+Pj4+PiBhcmUgYWxzbyBzZXZlcmFsIHByb2JsZW1z IGFzc29jaWF0ZWQgd2l0aCBpdHMgdXNhZ2UsIGFuZCB0aGVyZSBpc24ndCBhCj4+Pj4+PiBjb21w bGV0ZSAoYW5kIGFyY2hpdGVjdHVyYWxseSBkZWZpbmVkKSBndWFyYW50ZWUgdGhhdCBhbGwgbWFj aGluZXMKPj4+Pj4+IHdpbGwgcHJvdmlkZSByZWxpYWJsZSBhbmQgbW9ub3RvbmljIFRTQyBhY3Jv c3MgYWxsIENQVXMsIG9uIGRpZmZlcmVudAo+Pj4+Pj4gc29ja2V0cyBhbmQgZGlmZmVyZW50IFAv QyBzdGF0ZXMuICBJIGJlbGlldmUgSW50ZWwgdG8gYmUgdGhlIG9ubHkgdGhhdAo+Pj4+Pj4gY2Fu IGd1YXJhbnRlZSB0aGF0LiBGb3IgdGhpcyByZWFzb24gaXQncyBzZXQgd2l0aCBsZXNzIHByaW9y aXR5IHdoZW4KPj4+Pj4+IGNvbXBhcmVkIHRvIEhQRVQgdW5sZXNzIGFkbWluc3RyYXRvciBjaGFu Z2VzICJjbG9ja3NvdXJjZSIgYm9vdCBvcHRpb24KPj4+Pj4+IHRvICJ0c2MiLiBVcG9uIGluaXRp YWxpemluZyBpdCwgd2UgYWxzbyBjaGVjayBmb3IgdGltZSB3YXJwcyBhbmQKPj4+Pj4+IGFwcHJv cHJpYXRlIENQVSBmZWF0dXJlcyBpLmUuICBUU0NfUkVMSUFCTEUsIENPTlNUQU5UX1RTQyBhbmQK Pj4+Pj4+IE5PTlNUT1BfVFNDLiBBbmQgaW4gY2FzZSBub25lIG9mIHRoZXNlIGNvbmRpdGlvbnMg YXJlIG1ldCwgd2UgZmFpbCBpbgo+Pj4+Pj4gb3JkZXIgdG8gZmFsbGJhY2sgdG8gdGhlIG5leHQg YXZhaWxhYmxlIGNsb2Nrc291cmNlLgo+Pj4+Pj4KPj4+Pj4+IEl0IGlzIGFsc28gd29ydGggbm90 aW5nIHRoYXQgd2l0aCBjbG9ja3NvdXJjZT10c2MgdGhlcmUgaXNuJ3QgYW55Cj4+Pj4+PiBuZWVk IHRvIHN5bmNocm9uaXNlIHdpdGggYW5vdGhlciBjbG9ja3NvdXJjZSwgYW5kIEkgY291bGQgdmVy aWZ5IHRoYXQKPj4+Pj4+IGdyZWF0IHBvcnRpb24gdGhlIHRpbWUgc2tldyB3YXMgZWxpbWluYXRl ZCBhbmQgc2VlaW5nIG11Y2ggbGVzcyB0aW1lCj4+Pj4+PiB3YXJwcyBoYXBwZW5pbmcuIFdpdGgg SFBFVCBJIG9ic2VydmVkIH41MDAgd2FycHMgaW4gdGhlIHBlcmlvZAo+Pj4+Pj4gb2YgMWggb2Yg YXJvdW5kIDI3IHVzLCBhbmQgd2l0aCBUU0MgZG93biB0byA1MCB3YXJwcyBpbiB0aGUgc2FtZQo+ Pj4+Pj4gcGVyaW9kIGhhdmluZyBlYWNoIHdhcnAgPCAxMDAgbnMuIFRoZSB3YXJwcyBzdGlsbCBl eGlzdCB0aG91Z2ggYnV0Cj4+Pj4+PiBhcmUgb25seSByZWxhdGVkIHRvIGNyb3NzIENQVSBjYWxp YnJhdGlvbiAoYmVpbmcgaG93IG11Y2ggaXQgdGFrZXMgdG8KPj4+Pj4+IHJlbmRlenZvdXMgd2l0 aCBtYXN0ZXIpLCBpbiB3aGljaCBhIGxhdGVyIHBhdGNoIGluIHRoaXMgc2VyaWVzIGFpbXMgdG8K Pj4+Pj4+IHNvbHZlLgo+Pj4+Pj4KPj4+Pj4+IFNpZ25lZC1vZmYtYnk6IEpvYW8gTWFydGlucyA8 am9hby5tLm1hcnRpbnNAb3JhY2xlLmNvbT4KPj4+Pj4+IC0tLQo+Pj4+Pj4gQ2M6IEtlaXIgRnJh c2VyIDxrZWlyQHhlbi5vcmc+Cj4+Pj4+PiBDYzogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2Uu Y29tPgo+Pj4+Pj4gQ2M6IEFuZHJldyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+ Cj4+Pj4+Cj4+Pj4+IFNvbWUgc3R5bGUgY29ycmVjdGlvbnMsIGJ1dCBubyBmdW5jdGlvbmFsIHBy b2JsZW1zLgo+Pj4+Pgo+Pj4+PiBSZXZpZXdlZC1ieSBBbmRyZXcgQ29vcGVyIDxhbmRyZXcuY29v cGVyM0BjaXRyaXguY29tPgo+Pj4+Pgo+Pj4+IEkgZm91bmQgb3V0IG9uZSBpc3N1ZSBpbiB0aGUg dHNjIGNsb2Nrc291cmNlIGluaXRpYWxpemF0aW9uIHBhdGggd2l0aCByZXNwZWN0IHRvCj4+Pj4g dGhlIHJlbGlhYmlsaXR5IGNoZWNrLiBUaGlzIGNoZWNrIGlzIHJ1bm5pbmcgd2hlbiBpbml0aWFs aXppbmcgcGxhdGZvcm0gdGltZXIsCj4+Pj4gYnV0IG5vdCBhbGwgQ1BVUyBhcmUgdXAgYXQgdGhh dCBwb2ludCAoaW5pdF94ZW5fdGltZSgpKSB3aGljaCBtZWFucyB0aGF0IHRoZQo+Pj4+IGNoZWNr IHdpbGwgYWx3YXlzIHN1Y2NlZWQuIFNvIGZvciBjbG9ja3NvdXJjZT10c2MgSSBuZWVkIHRvIGRl ZmVyIGluaXRpYWxpemF0aW9uCj4+Pj4gdG8gYSBsYXRlciBwb2ludCAob24gdmVyaWZ5X3RzY19y ZWxpYWJpbGl0eSgpKSBhbmQgaWYgc3VjY2Vzc2Z1bCBzd2l0Y2ggdG8gdGhhdAo+Pj4+IGNsb2Nr c291cmNlLiBVbmxlc3MgeW91IGRpc2FncmVlLCB2MiB3b3VsZCBoYXZlIHRoaXMgYW5kIGp1c3Qg cmVxdWlyZXMgb25lCj4+Pj4gYWRkaXRpb25hbCBwcmVwYXJhdG9yeSBjaGFuZ2UgcHJpb3IgdG8g dGhpcyBwYXRjaC4KPj4+Cj4+PiBIbW0sIHRoYXQncyBzdXNwaWNpb3VzIHdoZW4gdGhpbmtpbmcg YWJvdXQgQ1BVIGhvdHBsdWc6IFdoYXQKPj4+IGRvIHlvdSBpbnRlbmQgdG8gZG8gd2hlbiBhIENQ VSBjb21lcyBvbmxpbmUgbGF0ZXIsIGZhaWxpbmcgdGhlCj4+PiBjaGVjaz8KPj4gR29vZCBwb2lu dCwgYnV0IEkgYW0gbm90IHN1cmUgd2hldGhlciB0aGF0IHdvdWxkIGhhcHBlbi4gVGhlIGluaXRj YWxsCj4+IHZlcmlmeV90c2NfcmVsaWFiaWxpdHkgc2VlbXMgdG8gYmUgY2FsbGVkIG9ubHkgZm9y IHRoZSBib290IHByb2Nlc3Nvci4gT3IgYXJlCj4+IHlvdSBzYXlpbmcgdGhhdCBpdCdzIGNhc2Ug dGhhdCBpbml0Y2FsbHMgYXJlIGNhbGxlZCB0b28gd2hlbiBob3RwbHVnZ2luZyBjcHVzCj4+IGxh dGVyIG9uPyBJZiB0aGF0J3MgdGhlIGNhc2UgdGhlbiBteSBzdWdnZXN0aW9uIHdvdWxkbid0IHdv cmsgYXMgeW91IHBvaW50IG91dCAtCj4+IG9yIHJhdGhlciB3aXRob3V0IGhhdmluZyBydW50aW1l IHN3aXRjaGluZyBzdXBwb3J0IGFzIHlvdSBwb2ludCBvdXQgYmVsb3cuCj4gCj4gTG9va3MgbGlr ZSBJIGRpZG4ndCBleHByZXNzIG15c2VsZiBjbGVhcmx5IGVub3VnaDogImZhaWxpbmcgdGhlIGNo ZWNrIgo+IHdhc24ndCBtZWFudCB0byBpbXBseSB0aGUgZmFpbHVyZSB3b3VsZCBhY3R1YWxseSBv Y2N1ciwgYnV0IHJhdGhlcgo+IHRoYXQgZmFpbHVyZSB3b3VsZCBvY2N1ciBpZiB0aGUgY2hlY2sg d2FzIHJ1biBvbiB0aGF0IENQVS4gSU9XIHRoZQo+IGNhc2Ugb2YgYSBDUFUgZ2V0dGluZyBob3Rw bHVnZ2VkIHdoaWNoIGRvZXNuJ3Qgc2F0aXNmeSB0aGUgbmVlZHMKPiBmb3Igc2VsZWN0aW5nIFRT QyBhcyB0aGUgY2xvY2sgc291cmNlLgpBaCwgSSBzZWUuIEkgYmVsaWV2ZSB0aGlzIHdvdWxkbid0 IGJlIGFuIGlzc3VlIHdpdGggdGhlIGN1cnJlbnQgcmVuZGV6dm91cwptZWNoYW5pc20gKHN0ZF9y ZW5kZXp2b3VzKSwgYXMgdGhlIGRlbHRhIGlzIGNvbXB1dGVkIGJldHdlZW4gbG9jYWxfdHNjX3N0 YW1wCnRha2VuIGluIHRoYXQgKGhvdHBsdWdnZWQpIENQVSBpbiB0aGUgY2FsaWJyYXRpb24gYW5k IHRoZSByZHRzYygpIGluIHRoZSBndWVzdApzYW1lIENQVSwgZXZlbiB0aG91Z2ggaGF2aW5nIENQ VTAgVFNDIChtYXN0ZXIpIGFzIHN5c3RlbV90aW1lLgoKSG93ZXZlciBpdCBjYW4gYmUgYSBwcm9i bGVtIHdpdGggUFZDTE9DS19UU0NfU1RBQkxFX0JJVCBhcyB0aGUgaG90cGx1Z2dlZCBDUFUKY291 bGQgaGF2ZSBpdHMgVFNDIGRyaWZ0ZWQsIGFuZCBzaW5jZSBzZXR0aW5nIHRoaXMgZmxhZyByZWxp ZXMgb24Kc3luY2hyb25pemF0aW9uIG9mIFRTQ3Mgd2Ugd291bGQgbmVlZCB0byBjbGVhciB0aGUg ZmxhZyBlbnRlcmlseS4KCj4+PiBTbyBmYXIgd2UgZG9uJ3QgZG8gcnVudGltZSBzd2l0Y2hpbmcg b2YgdGhlIGNsb2NrIHNvdXJjZSwKPj4+IGFuZCBJJ20gbm90IHN1cmUgdGhhdCdzIGEgZ29vZCBp ZGVhIHRvIGRvIHdoZW4gdGhlcmUgYXJlIHJ1bm5pbmcKPj4+IGd1ZXN0cy4KPj4gVG90YWxseSBh Z3JlZSwgYnV0IEkgd291bGQgYmUgcHJvcG9zaW5nIHRvIGJlIGF0IGluaXRpYWxpemF0aW9uIHBo YXNlIHdoZXJlCj4+IHRoZXJlIHdvdWxkbid0IGJlIGd1ZXN0cyBydW5uaW5nLiBXZSB3b3VsZCBz dGFydCB3aXRoIEhQRVQsIHRoZW4gb25seSBzd2l0Y2ggCj4+IHRvCj4+IFRTQyBpZiB0aGF0IGNo ZWNrIGhhcyBwYXNzZWQgKGFuZCB3b3VsZCBoYXBwZW4gb25jZSkuCj4+Cj4+IFNpbXBsZXIgYWx0 ZXJuYXRpdmUgd291bGQgYmUgdG8gY2FsbCBpbml0X3hlbl90aW1lIGFmdGVyIGFsbCBDUFVzIGFy ZSAKPj4gYnJvdWdodCB1cAo+PiAoYW5kIHdvdWxkIGFsc28ga2VlcCB0aGlzIHBhdGNoIGFzIGlz KSwgYnV0IEkgYW0gbm90IHN1cmUgYWJvdXQgdGhlCj4+IHJlcGVyY3Vzc2lvbnMgb2YgdGhhdC4K PiAKPiBJIGRvbid0IHNlZSBob3cgZWl0aGVyIHdvdWxkIGhlbHAgd2l0aCB0aGUgaG90cGx1ZyBj YXNlLgpUaGlzIHdhcyBpbiByZXNwb25zZSB0byB3aGF0IEkgdGhvdWdodCB5b3UgbWVhbnQgd2l0 aCB5b3VyIGVhcmxpZXIgcXVlc3Rpb24KKHdoaWNoIEkgbWlzdW5kZXJzdG9vZCkuIEJ1dCBteSBx dWVzdGlvbiBpcyBzdGlsbCB2YWxpZCBJIGJlbGlldmUuIFRoZSByZWFzb24KZm9yIGNob29zaW5n IGJldHdlZW4gbXkgc3VnZ2VzdGVkIGFwcHJvYWNoZXMgaXMgdGhhdCB0c2NfY2hlY2tfcmVsaWFi aWxpdHkoKQpyZXF1aXJlcyBhbGwgQ1BVcyB1cCBzbyB0aGF0IHRoZSBjaGVjayBpcyBjb3JyZWN0 bHkgcGVyZm9ybWVkLgoKSm9hbwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9y ZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK