From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Kuoppala Subject: Re: [PATCH 2/3] drm/i915: Do not use iowait while waiting for the GPU Date: Tue, 31 Jul 2018 16:03:04 +0300 Message-ID: <87bmana77b.fsf@gaia.fi.intel.com> References: <20180730152522.31682-1-chris@chris-wilson.co.uk> <20180730152522.31682-3-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id B669F89F49 for ; Tue, 31 Jul 2018 13:04:20 +0000 (UTC) In-Reply-To: <20180730152522.31682-3-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 Cc: Eero Tamminen List-Id: intel-gfx@lists.freedesktop.org Q2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+IHdyaXRlczoKCj4gQSByZWNl bnQgdHJlbmQgZm9yIGNwdWZyZXEgaXMgdG8gYm9vc3QgdGhlIENQVSBmcmVxdWVuY2llcyBmb3IK PiBpb3dhaXRlcnMsIGluIHBhcnRpY3VsYXJseSB0byBiZW5lZml0IGhpZ2ggZnJlcXVlbmN5IEkv Ty4gV2UgZG8gdGhlIHNhbWUKPiBhbmQgYm9vc3QgdGhlIEdQVSBjbG9ja3MgdG8gdHJ5IGFuZCBt aW5pbWlzZSB0aW1lIHNwZW50IHdhaXRpbmcgZm9yIHRoZQo+IEdQVS4gSG93ZXZlciwgYXMgdGhl IGlnZnggYW5kIENQVSBzaGFyZSB0aGUgc2FtZSBURFAsIGJvb3N0aW5nIHRoZSBDUFUKPiBmcmVx dWVuY3kgd2lsbCByZXN1bHQgaW4gdGhlIEdQVSBiZWluZyB0aHJvdHRsZWQgYW5kIGl0cyBmcmVx dWVuY3kgYmVpbmcKPiByZWR1Y2VkLiBUaHVzIGRlY2xhcmluZyBpb3dhaXQgbmVnYXRpdmVseSBp bXBhY3RzIG9uIEdQVSB0aHJvdWdocHV0Lgo+Cj4gdjI6IEJvdGggc2xlZXBzIQo+Cj4gQnVnemls bGE6IGh0dHBzOi8vYnVncy5mcmVlZGVza3RvcC5vcmcvc2hvd19idWcuY2dpP2lkPTEwNzQxMAo+ IFJlZmVyZW5jZXM6IDUyY2NjNDMxNDI5MyAoImNwdWZyZXE6IGludGVsX3BzdGF0ZTogSFdQIGJv b3N0IHBlcmZvcm1hbmNlIG9uIElPIHdha2V1cCIpCgpUaGUgY29tbWl0IGFib3ZlIGhhcyBpdCdz IG93biBoZXVyaXN0aWNzIG9uIHdoZW4gdG8gYWN0dWFsIHJhbXAgdXAsCmluc3BlY3RpbmcgdGhl IGludGVydmFsIG9mIGlvIHdhaXRzLgoKUmVnYXJkbGVzcyBvZiB0aGF0LCB3aXRoIHNoYXJlZCB0 ZHAsIHRoZSB3YWl0ZXIgc2hvdWxkIG5vdCBzdGFuZCBpbiBhCndheS4gQW5kIHRoYXQgaXQgZml4 ZXMgYSByZWdyZXNzaW9uOgoKUmV2aWV3ZWQtYnk6IE1pa2EgS3VvcHBhbGEgPG1pa2Eua3VvcHBh bGFAbGludXguaW50ZWwuY29tPgoKT24gb3RoZXIgd2F5IGFyb3VuZCwgdGhlIGF0b21pYyBjb21t aXQgY29kZSBvbiB1cGRhdGluZwpwbGFuZXMsIGNvdWxkIHBvdGVudGlhbGx5IGJlbmVmaXQgb2Yg Y2hhbmdpbmcgdG8gdGhlCmlvX3NjaGVkdWxlX3RpbWVvdXQuIChhbmQvb3IgYWRvcHRpbmcgYyBz dGF0ZSBsaW1pdHMpCgotTWlrYQoKPiBTaWduZWQtb2ZmLWJ5OiBDaHJpcyBXaWxzb24gPGNocmlz QGNocmlzLXdpbHNvbi5jby51az4KPiBDYzogVHZydGtvIFVyc3VsaW4gPHR2cnRrby51cnN1bGlu QGxpbnV4LmludGVsLmNvbT4KPiBDYzogSm9vbmFzIExhaHRpbmVuIDxqb29uYXMubGFodGluZW5A bGludXguaW50ZWwuY29tPgo+IENjOiBFZXJvIFRhbW1pbmVuIDxlZXJvLnQudGFtbWluZW5AaW50 ZWwuY29tPgo+IENjOiBGcmFuY2lzY28gSmVyZXogPGN1cnJvamVyZXpAcmlzZXVwLm5ldD4KPiAt LS0KPiAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9yZXF1ZXN0LmMgfCA0ICsrLS0KPiAgMSBm aWxlIGNoYW5nZWQsIDIgaW5zZXJ0aW9ucygrKSwgMiBkZWxldGlvbnMoLSkKPgo+IGRpZmYgLS1n aXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X3JlcXVlc3QuYyBiL2RyaXZlcnMvZ3B1L2Ry bS9pOTE1L2k5MTVfcmVxdWVzdC5jCj4gaW5kZXggZjNmZjhkYmUzNjNkLi4zZTQ4ZWE4N2IzMjQg MTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9yZXF1ZXN0LmMKPiArKysg Yi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X3JlcXVlc3QuYwo+IEBAIC0xMzc2LDcgKzEzNzYs NyBAQCBsb25nIGk5MTVfcmVxdWVzdF93YWl0KHN0cnVjdCBpOTE1X3JlcXVlc3QgKnJxLAo+ICAJ CQlnb3RvIGNvbXBsZXRlOwo+ICAJCX0KPiAgCj4gLQkJdGltZW91dCA9IGlvX3NjaGVkdWxlX3Rp bWVvdXQodGltZW91dCk7Cj4gKwkJdGltZW91dCA9IHNjaGVkdWxlX3RpbWVvdXQodGltZW91dCk7 Cj4gIAl9IHdoaWxlICgxKTsKPiAgCj4gIAlHRU1fQlVHX09OKCFpbnRlbF93YWl0X2hhc19zZXFu bygmd2FpdCkpOwo+IEBAIC0xNDE0LDcgKzE0MTQsNyBAQCBsb25nIGk5MTVfcmVxdWVzdF93YWl0 KHN0cnVjdCBpOTE1X3JlcXVlc3QgKnJxLAo+ICAJCQkJICAgICAgd2FpdC5zZXFubyAtIDEpKQo+ ICAJCQlxb3MgPSB3YWl0X2RtYV9xb3NfYWRkKCk7Cj4gIAo+IC0JCXRpbWVvdXQgPSBpb19zY2hl ZHVsZV90aW1lb3V0KHRpbWVvdXQpOwo+ICsJCXRpbWVvdXQgPSBzY2hlZHVsZV90aW1lb3V0KHRp bWVvdXQpOwo+ICAKPiAgCQlpZiAoaW50ZWxfd2FpdF9jb21wbGV0ZSgmd2FpdCkgJiYKPiAgCQkg ICAgaW50ZWxfd2FpdF9jaGVja19yZXF1ZXN0KCZ3YWl0LCBycSkpCj4gLS0gCj4gMi4xOC4wCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBt YWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3Rz LmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=