From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH] drm/i915: Do not use iowait while waiting for the GPU Date: Sat, 28 Jul 2018 21:58:35 +0100 Message-ID: <153281151580.24377.10340169753397679886@skylake-alporthouse-com> References: <20180727184312.29937-1-chris@chris-wilson.co.uk> <87pnz8gcmr.fsf@riseup.net> <153278776733.24377.4575869668307623950@skylake-alporthouse-com> <87tvojf711.fsf@riseup.net> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id E497E6E036 for ; Sat, 28 Jul 2018 20:59:09 +0000 (UTC) In-Reply-To: <87tvojf711.fsf@riseup.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Francisco Jerez , intel-gfx@lists.freedesktop.org Cc: Eero Tamminen List-Id: intel-gfx@lists.freedesktop.org UXVvdGluZyBGcmFuY2lzY28gSmVyZXogKDIwMTgtMDctMjggMjE6MTg6NTApCj4gQ2hyaXMgV2ls c29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+IHdyaXRlczoKPiAKPiA+IFF1b3RpbmcgRnJh bmNpc2NvIEplcmV6ICgyMDE4LTA3LTI4IDA2OjIwOjEyKQo+ID4+IENocmlzIFdpbHNvbiA8Y2hy aXNAY2hyaXMtd2lsc29uLmNvLnVrPiB3cml0ZXM6Cj4gPj4gCj4gPj4gPiBBIHJlY2VudCB0cmVu ZCBmb3IgY3B1ZnJlcSBpcyB0byBib29zdCB0aGUgQ1BVIGZyZXF1ZW5jaWVzIGZvcgo+ID4+ID4g aW93YWl0ZXJzLCBpbiBwYXJ0aWN1bGFybHkgdG8gYmVuZWZpdCBoaWdoIGZyZXF1ZW5jeSBJL08u IFdlIGRvIHRoZSBzYW1lCj4gPj4gPiBhbmQgYm9vc3QgdGhlIEdQVSBjbG9ja3MgdG8gdHJ5IGFu ZCBtaW5pbWlzZSB0aW1lIHNwZW50IHdhaXRpbmcgZm9yIHRoZQo+ID4+ID4gR1BVLiBIb3dldmVy LCBhcyB0aGUgaWdmeCBhbmQgQ1BVIHNoYXJlIHRoZSBzYW1lIFREUCwgYm9vc3RpbmcgdGhlIENQ VQo+ID4+ID4gZnJlcXVlbmN5IHdpbGwgcmVzdWx0IGluIHRoZSBHUFUgYmVpbmcgdGhyb3R0bGVk IGFuZCBpdHMgZnJlcXVlbmN5IGJlaW5nCj4gPj4gPiByZWR1Y2VkLiBUaHVzIGRlY2xhcmluZyBp b3dhaXQgbmVnYXRpdmVseSBpbXBhY3RzIG9uIEdQVSB0aHJvdWdocHV0Lgo+ID4+ID4KPiA+PiA+ IEJ1Z3ppbGxhOiBodHRwczovL2J1Z3MuZnJlZWRlc2t0b3Aub3JnL3Nob3dfYnVnLmNnaT9pZD0x MDc0MTAKPiA+PiA+IFJlZmVyZW5jZXM6IDUyY2NjNDMxNDI5MyAoImNwdWZyZXE6IGludGVsX3Bz dGF0ZTogSFdQIGJvb3N0IHBlcmZvcm1hbmNlIG9uIElPIHdha2V1cCIpCj4gPj4gCj4gPj4gVGhp cyBwYXRjaCBjYXVzZXMgdXAgdG8gfjEzJSBwZXJmb3JtYW5jZSByZWdyZXNzaW9ucyAod2l0aCBz aWduaWZpY2FuY2UKPiA+PiA1JSkgb24gc2V2ZXJhbCBsYXRlbmN5LXNlbnNpdGl2ZSB0ZXN0cyBv biBteSBCWFQ6Cj4gPj4gCj4gPj4gIGp4cmVuZGVybWFyay9yZW5kZXJpbmctdGVzdD1MaW5lYXIg R3JhZGllbnQgQmxlbmQvcmVuZGVyaW5nLXNpemU9MTI4eDEyODogICAgIFhYWCDCsTM1LjY5JSB4 NTMgLT4gWFhYIMKxMzIuNTclIHg2MSBkPS0xMy41MiUgwrEzMS44OCUgcD0yLjU4JQo+ID4KPiAK PiBUaGUganhyZW5kZXJtYXJrIExpbmVhciBHcmFkaWVudCBCbGVuZCB0ZXN0LWNhc2UgaGFkIHBy b2JhYmx5IHRoZQo+IHNtYWxsZXN0IGVmZmVjdCBzaXplIG9mIGFsbCB0aGUgcmVncmVzc2lvbnMg SSBub3RpY2VkLi4uICBDYW4geW91IHRha2UgYQo+IGxvb2sgYXQgYW55IG9mIHRoZSBvdGhlciBv bmVzIGluc3RlYWQ/CgpJdCB3YXMgdGhlIGJpZ2dlc3QgaW4gdGhlIGxpc3QsIHdhcyBpdCBub3Q/ IEkgZGlkbid0IG9ic2VydmUgYW55dGhpbmcgb2YKbm90ZSBpbiBhIHF1aWNrIGxvb2sgYXQgeDEx cGVyZiwgYnV0IGRpZG4ndCBsZXQgaXQgcnVuIGZvciBhIGdvb2Qgc2FtcGxlCnNpemUuIFRoZXkg ZGlkbid0IHNlZW0gdG8gYmUgYXMgcmVsZXZhbnQgYXMganhyZW5kZXJtYXJrIHNvIEkgd2VudCBh bmQKZHVnIHRoYXQgb3V0LgogCj4gPiBDdXJpb3VzLCBhcyB0aGlzIGlzIGp1c3QgYSBidW5jaCBv ZiBjb21wb3NpdGVzIGFuZCBhcyB3aXRoIHRoZSBvdGhlcnMsCj4gPiBzaG91bGQgbmV2ZXIgYmUg bGF0ZW5jeSBzZW5zaXRpdmUgKGF0IGxlYXN0IHVuZGVyIGJhcmUgWDExKS4KPiAKPiBUaGV5IGFy ZSBsYXJnZWx5IGxhdGVuY3ktc2Vuc2l0aXZlIGR1ZSB0byB0aGUgcG9vciBwaXBlbGluaW5nIHRo ZXkgc2VlbQo+IHRvIGFjaGlldmUgYmV0d2VlbiB0aGVpciBHUFUgcmVuZGVyaW5nIHdvcmsgYW5k IHRoZSBYMTEgdGhyZWFkLgoKT25seSB0aGUgWDExIHRocmVhZCBpcyB0b3VjaGluZyB0aGUgR1BV LCBhbmQgaW4gdGhlIGNhc2VzIEkgbG9va2VkIGF0Cml0LCB3ZSB3ZXJlIGVpdGhlciB3YWl0aW5n IGZvciB0aGUgcmluZyB0byBkcmFpbiBvciBvbiB0aHJvdHRsaW5nLgpTeW5jaHJvbmlzYXRpb24g d2l0aCB0aGUgR1BVIHdhcyBvbmx5IGZvciBkcmFpbmluZyB0aGUgcXVldWUgb24gdGltaW5nLAph bmQgdGhlIGNwdSB3YXMgYWJsZSB0byBzdGF5IGFoZWFkIGR1cmluZyB0aGUgYmVuY2htYXJrLgoK T2ZmIHRoZSB0b3Agb2YgbXkgaGVhZCwgZm9yIFggdG8gYmUgbGF0ZW5jeSBzZW5zaXRpdmUgeW91 IG5lZWQgdG8gbWl4CmNsaWVudCBhbmQgWHNlcnZlciByZW5kZXJpbmcsIGFsb25nIHRoZSBsaW5l cyBvZiBQYWludDsgR2V0SW1hZ2UsIGluIHRoZQpleHRyZW1lIGJlY29taW5nIGdlbV9zeW5jLiBB ZGRpbmcgYSBjb21wb3NpdG9yIGlzIGFsc28gaW50ZXJlc3RpbmcgZm9yCnRoZSBjb250ZXh0IHN3 aXRjaGluZyB3aWxsIHByZXZlbnQgdXMgbWVyZ2luZyByZXF1ZXN0cyAoYnV0IHRoYXQgYWxsCmRl cGVuZHMgb24gdGhlIGZyZXF1ZW5jeSBvZiBjb21wb3NpdG9yIHVwZGF0ZXMgb2ZjKSwgYW5kIHdl IHdvdWxkCm5lZWQgbW9yZSBDUFUgYW5kIHJlcXVpcmUgcmVhc29uYWJseSBsb3cgbGF0ZW5jeSAo bGVzcyB0aGFuIHRoZSBuZXh0CnJlcXVlc3QpIHRvIGtlZXAgdGhlIEdQVSBidXN5LiBIb3dldmVy LCB0aGF0IGlzIGRyaXZlbiBkaXJlY3RseSBvZmYKaW50ZXJydXB0cywgaW93YWl0IGlzbid0IGEg ZmFjdG9yIC0tIGJ1dCB5b3VyIGhvb2sgY291bGQgc3RpbGwgYmUgdXNlZnVsCnRvIHByb3ZpZGUg cG1fcW9zLgotQ2hyaXMKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Au b3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwt Z2Z4Cg==