From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Kuoppala Subject: Re: [PATCH] drm/i915: "Race-to-idle" on switching to the kernel context Date: Mon, 21 Aug 2017 12:17:52 +0300 Message-ID: <87h8x1qny7.fsf@gaia.fi.intel.com> References: <20170818140815.468-1-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8240C6E1FE for ; Mon, 21 Aug 2017 09:19:51 +0000 (UTC) In-Reply-To: <20170818140815.468-1-chris@chris-wilson.co.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Q2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+IHdyaXRlczoKCj4gRHVyaW5n IHN1c3BlbmQgd2Ugd2FudCB0byBmbHVzaCBvdXQgYWxsIGFjdGl2ZSBjb250ZXh0cyBhbmQgdGhl aXIKPiByZW5kZXJpbmcuIFRvIGRvIHNvIHdlIHF1ZXVlIGEgcmVxdWVzdCBmcm9tIHRoZSBrZXJu ZWwncyBjb250ZXh0LCBvbmNlCj4gd2Uga25vdyB0aGF0IHJlcXVlc3QgaXMgZG9uZSwgd2Uga25v dyB0aGUgR1BVIGlzIGNvbXBsZXRlbHkgaWRsZS4gVG8KPiBzcGVlZCB1cCB0aGF0IHN3aXRjaCBi dW1wIHRoZSBHUFUgY2xvY2tzLgo+Cj4gU3dpdGNoaW5nIHRvIHRoZSBrZXJuZWwgY29udGV4dCBw cmlvciB0byBpZGxpbmcgaXMgYWxzbyB1c2VkIHRvIGVuZm9yY2UKPiBhIGJhcnJpZXIgYmVmb3Jl IGNoYW5naW5nIE9BIHByb3BlcnRpZXMsIGFuZCB3aGVuIGV2aWN0aW5nIGFjdGl2ZQo+IHJlbmRl cmluZyBmcm9tIHRoZSBnbG9iYWwgR1RULiBBbGwgY2FzZXMgd2hlcmUgd2UgZG8gd2FudCB0bwo+ IHJhY2UtdG8taWRsZS4KPgo+IFNpZ25lZC1vZmYtYnk6IENocmlzIFdpbHNvbiA8Y2hyaXNAY2hy aXMtd2lsc29uLmNvLnVrPgo+IENjOiBEYXZpZCBXZWluZWhhbGwgPGRhdmlkLndlaW5laGFsbEBs aW51eC5pbnRlbC5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtX2Nv bnRleHQuYyB8IDExICsrKysrKysrLS0tCj4gIDEgZmlsZSBjaGFuZ2VkLCA4IGluc2VydGlvbnMo KyksIDMgZGVsZXRpb25zKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUv aTkxNV9nZW1fY29udGV4dC5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW1fY29udGV4 dC5jCj4gaW5kZXggNThhMmE0NGY4OGJkLi5jYTE0MjNhZDI3MDggMTAwNjQ0Cj4gLS0tIGEvZHJp dmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW1fY29udGV4dC5jCj4gKysrIGIvZHJpdmVycy9ncHUv ZHJtL2k5MTUvaTkxNV9nZW1fY29udGV4dC5jCj4gQEAgLTg5NSw2ICs4OTUsNyBAQCBpbnQgaTkx NV9nZW1fc3dpdGNoX3RvX2tlcm5lbF9jb250ZXh0KHN0cnVjdCBkcm1faTkxNV9wcml2YXRlICpk ZXZfcHJpdikKPiAgCj4gIAlmb3JfZWFjaF9lbmdpbmUoZW5naW5lLCBkZXZfcHJpdiwgaWQpIHsK PiAgCQlzdHJ1Y3QgZHJtX2k5MTVfZ2VtX3JlcXVlc3QgKnJlcTsKPiArCQlib29sIGFjdGl2ZSA9 IGZhbHNlOwo+ICAJCWludCByZXQ7Cj4gIAo+ICAJCWlmIChlbmdpbmVfaGFzX2tlcm5lbF9jb250 ZXh0KGVuZ2luZSkpCj4gQEAgLTkxMywxMyArOTE0LDE3IEBAIGludCBpOTE1X2dlbV9zd2l0Y2hf dG9fa2VybmVsX2NvbnRleHQoc3RydWN0IGRybV9pOTE1X3ByaXZhdGUgKmRldl9wcml2KQo+ICAJ CQlwcmV2ID0gaTkxNV9nZW1fYWN0aXZlX3JhdygmdGwtPmxhc3RfcmVxdWVzdCwKPiAgCQkJCQkJ ICAgJmRldl9wcml2LT5kcm0uc3RydWN0X211dGV4KTsKPiAgCQkJaWYgKHByZXYpCj4gLQkJCQlp OTE1X3N3X2ZlbmNlX2F3YWl0X3N3X2ZlbmNlX2dmcCgmcmVxLT5zdWJtaXQsCj4gLQkJCQkJCQkJ ICZwcmV2LT5zdWJtaXQsCj4gLQkJCQkJCQkJIEdGUF9LRVJORUwpOwo+ICsJCQkJYWN0aXZlIHw9 IGk5MTVfc3dfZmVuY2VfYXdhaXRfc3dfZmVuY2VfZ2ZwKCZyZXEtPnN1Ym1pdCwKPiArCQkJCQkJ CQkJICAgJnByZXYtPnN1Ym1pdCwKPiArCQkJCQkJCQkJICAgR0ZQX0tFUk5FTCkgPiAwOwoKVGhl cmUgaXMgbm8gcG9pbnQgb2Yga2lja2luZyB0aGUgY2xvY2tzIGlmIHdlIGFyZSB0aGUgb25seSBy ZXF1ZXN0IGxlZnQ/CgpXZWxsIGxvZ2ljYWwgYXMgdGhlIHJlcXVlc3QgaXMgZW1wdHksIGp1c3Qg cG9uZGVyaW5nIGlmIHRoZSBhY3R1YWwgY3R4CnNhdmUvcmVzdG9yZSB3b3VsZCBmaW5pc2ggcXVp Y2tlci4KCi1NaWthCgo+ICAJCX0KPiAgCj4gIAkJcmV0ID0gaTkxNV9zd2l0Y2hfY29udGV4dChy ZXEpOwo+ICsKPiArCQlpZiAoYWN0aXZlKQo+ICsJCQlnZW42X3Jwc19ib29zdChyZXEsIE5VTEwp Owo+ICAJCWk5MTVfYWRkX3JlcXVlc3QocmVxKTsKPiArCj4gIAkJaWYgKHJldCkKPiAgCQkJcmV0 dXJuIHJldDsKPiAgCX0KPiAtLSAKPiAyLjE0LjEKPgo+IF9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fCj4gSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdAo+IEludGVs LWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKPiBodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeApfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0 cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9s aXN0aW5mby9pbnRlbC1nZngK