From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: [PATCH v10 09/11] x86/ctxt: Issue a speculation barrier between vcpu contexts Date: Fri, 26 Jan 2018 12:13:39 +0100 Message-ID: <1516965219.15341.100.camel@suse.com> References: <1516799535-5778-1-git-send-email-andrew.cooper3@citrix.com> <1516799535-5778-10-git-send-email-andrew.cooper3@citrix.com> <5A6A0C7A02000078001A275A@prv-mh.provo.novell.com> <345bd2ef-1319-d9a6-522c-31e42bcd2c2e@citrix.com> <1516906149.15341.66.camel@suse.com> <1516928885.15341.72.camel@suse.com> <5A6B064C02000078001A2A68@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============5954520776229789606==" Return-path: In-Reply-To: <5A6B064C02000078001A2A68@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich Cc: Andrew Cooper , Dario Faggioli , David Woodhouse , Xen-devel List-Id: xen-devel@lists.xenproject.org --===============5954520776229789606== Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-QrOpbQwUyTAZqjdrOfAo" --=-QrOpbQwUyTAZqjdrOfAo Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2018-01-26 at 02:43 -0700, Jan Beulich wrote: > > > > On 26.01.18 at 02:08, wrote: > > And in order to go and investigate this a bit further, Jan, what is > > it > > that you were doing when you saw what you described above? AFAIUI, > > that's booting an HVM guest, isn't it? >=20 > Yes, plus then run some arbitrary work inside it. >=20 Ok. And you've seen the "spurious" migrations only/mostly during boot, or even afterwords, while running this work? > > How many vCPUs on how many pCPUs? Basically, I would just need a > > confirmation that the system was not oversubscribed, but if, while > > we're here, you can tell me the details, I'll put together an as > > much > > as possible similar scenario. >=20 > 12 pCPU-s, HVM guest has 8 vCPU-s, Dom0 has 12 pCPU-s (but > no other load than that caused by the guest).=20 > Ok. > If you want, I could > bring the code I've used for monitoring into patch form and hand > it to you. >=20 If it's not a problem, and whenever you have time, yes, that would be useful, I think. Thanks and Regards, Dario --=20 <> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Software Engineer @ SUSE https://www.suse.com/ --=-QrOpbQwUyTAZqjdrOfAo Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEES5ssOj3Vhr0WPnOLFkJ4iaW4c+4FAlprDWMACgkQFkJ4iaW4 c+5R9xAA0T6u0KIpN214wqdDj8AMZ/Zus8Uf2K+bp2ZXwydmMnx9gsyUyjs1xFIN PVD3IoysFcuhaVLQoh3FJSzyXrdKt3gnva6oyg9xI1xVWyvNlrKQgaGjYcoztDFl /Gdfm3sPLcPN6KT200+8Kp+FNK1n/m/u04+k9mUFwYfpTzD471++2iCsulGl5dyA ZqWswxXhXHWizS59u1Ib8o90uc5GzQpiakPRhOZPVN9ZvBzsp6G5sJb73CZgR25a mOHk9oQAGOD9waza2Cnd9oNxEzpYVreNwWaO3LbOVZYTXUnUT08znM9Q7UhoDSVc xSrECmWYVB38eXmoT5ocmGK+LSF3XSd6jNNj81WnQp0kpLSMqSVcdiZAGk8rBRM/ 6DSZGzS01K/Kgqy1vSwyOa52S5ftU1p/U1lNop8erCV01eXbP+4/49z2a0N/5r+E adlfp3D8uF2qSkARFZHHYQfhleCicsblwKDP6chjomjrhos3nZ2OCYbX/mOeeUqZ kNJfWKftq15R4ghrjmG0lab0NVgJ7buAcHtXaM+NJyKgUGSmg8LTc/mWIPHOk695 RDSxiuYdJqH8o0f9zff5yDrqbDFZlufWh+gseDJNgDcipj5zlTu1x2tbkogTTJrk NHh1fgoTmv0d/u67KWgGuQANm7/WF1Go+6AE8dkV9CCV+j4eYHs= =cOKK -----END PGP SIGNATURE----- --=-QrOpbQwUyTAZqjdrOfAo-- --===============5954520776229789606== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0 cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA== --===============5954520776229789606==--