From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tvrtko Ursulin Subject: Re: [PATCH igt 5/5] igt/perf_pmu: Speed up frequency measurement Date: Fri, 22 Dec 2017 13:27:00 +0000 Message-ID: References: <20171222110323.21230-1-chris@chris-wilson.co.uk> <20171222110323.21230-5-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" 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 489726E409 for ; Fri, 22 Dec 2017 13:27:06 +0000 (UTC) In-Reply-To: <20171222110323.21230-5-chris@chris-wilson.co.uk> Content-Language: en-GB 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 Ck9uIDIyLzEyLzIwMTcgMTE6MDMsIENocmlzIFdpbHNvbiB3cm90ZToKPiBVc2UgdGhlIG5vcm1h bCBiYXRjaF9kdXJhdGlvbl9ucyBhbmQgZGlzcGxheSB0aGUgc2FtcGxlZCBmcmVxdWVuY3k6Cj4g Cj4gCUZyZXF1ZW5jeTogbWluPTEwMCwgbWF4PTc1MCwgYm9vc3Q9NzUwIE1Iego+IAlNaW4gZnJl cXVlbmN5OiByZXF1ZXN0ZWQgMTAwLjAsIGFjdHVhbCAxMDAuMAo+IAlNYXggZnJlcXVlbmN5OiBy ZXF1ZXN0ZWQgNzU1LjYsIGFjdHVhbCA3NTUuNgo+IAo+IHYyOiBSZW1vdmUgdGhlIGVhcmx5IHNw aW5fYmF0Y2hfZW5kIGFuZCBhc3NlcnQgdGhlIG1lYXN1cmVkIGZyZXF1ZW5jaWVzCj4gYXJlIHdp dGhpbiB0b2xlcmFuY2Ugb2Ygb3VyIHRhcmdldC4KPiAKPiBTaWduZWQtb2ZmLWJ5OiBDaHJpcyBX aWxzb24gPGNocmlzQGNocmlzLXdpbHNvbi5jby51az4KPiBDYzogVHZydGtvIFVyc3VsaW4gPHR2 cnRrby51cnN1bGluQGludGVsLmNvbT4KPiAtLS0KPiAgIHRlc3RzL3BlcmZfcG11LmMgfCAzOSAr KysrKysrKysrKysrKysrKysrKysrKy0tLS0tLS0tLS0tLS0tLS0KPiAgIDEgZmlsZSBjaGFuZ2Vk LCAyMyBpbnNlcnRpb25zKCspLCAxNiBkZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0tZ2l0IGEvdGVz dHMvcGVyZl9wbXUuYyBiL3Rlc3RzL3BlcmZfcG11LmMKPiBpbmRleCBkODgyODdjMTcuLmViODc5 MWNkNCAxMDA2NDQKPiAtLS0gYS90ZXN0cy9wZXJmX3BtdS5jCj4gKysrIGIvdGVzdHMvcGVyZl9w bXUuYwo+IEBAIC05MzEsOSArOTMxLDEwIEBAIHRlc3RfaW50ZXJydXB0cyhpbnQgZ2VtX2ZkKQo+ ICAgc3RhdGljIHZvaWQKPiAgIHRlc3RfZnJlcXVlbmN5KGludCBnZW1fZmQpCj4gICB7Cj4gLQlj b25zdCB1aW50NjRfdCBkdXJhdGlvbl9ucyA9IDJlOTsKPiAgIAl1aW50MzJfdCBtaW5fZnJlcSwg bWF4X2ZyZXEsIGJvb3N0X2ZyZXE7Cj4gLQl1aW50NjRfdCBtaW5bMl0sIG1heFsyXSwgc3RhcnRb Ml07Cj4gKwl1aW50NjRfdCB2YWxbMl0sIHN0YXJ0WzJdOwo+ICsJZG91YmxlIG1pblsyXSwgbWF4 WzJdOwo+ICsJdW5zaWduZWQgbG9uZyBzbGVwdDsKPiAgIAlpZ3Rfc3Bpbl90ICpzcGluOwo+ICAg CWludCBmZCwgc3lzZnM7Cj4gICAKPiBAQCAtOTYyLDE3ICs5NjMsMTggQEAgdGVzdF9mcmVxdWVu Y3koaW50IGdlbV9mZCkKPiAgIAlpZ3RfcmVxdWlyZShpZ3Rfc3lzZnNfc2V0X3UzMihzeXNmcywg Imd0X2Jvb3N0X2ZyZXFfbWh6IiwgbWluX2ZyZXEpKTsKPiAgIAlpZ3RfcmVxdWlyZShpZ3Rfc3lz ZnNfZ2V0X3UzMihzeXNmcywgImd0X2Jvb3N0X2ZyZXFfbWh6IikgPT0gbWluX2ZyZXEpOwo+ICAg Cj4gKwlnZW1fcXVpZXNjZW50X2dwdShnZW1fZmQpOyAvKiBJZGxlIHRvIGJlIHN1cmUgdGhlIGNo YW5nZSB0YWtlcyBlZmZlY3QgKi8KPiArCXNwaW4gPSBpZ3Rfc3Bpbl9iYXRjaF9uZXcoZ2VtX2Zk LCAwLCBJOTE1X0VYRUNfUkVOREVSLCAwKTsKPiAgIAlwbXVfcmVhZF9tdWx0aShmZCwgMiwgc3Rh cnQpOwo+ICAgCj4gLQlzcGluID0gaWd0X3NwaW5fYmF0Y2hfbmV3KGdlbV9mZCwgMCwgSTkxNV9F WEVDX1JFTkRFUiwgMCk7Cj4gLQlpZ3Rfc3Bpbl9iYXRjaF9zZXRfdGltZW91dChzcGluLCBkdXJh dGlvbl9ucyk7Cj4gLQlnZW1fc3luYyhnZW1fZmQsIHNwaW4tPmhhbmRsZSk7Cj4gKwlzbGVwdCA9 IG1lYXN1cmVkX3VzbGVlcChiYXRjaF9kdXJhdGlvbl9ucyAvIDEwMDApOwo+ICAgCj4gLQlwbXVf cmVhZF9tdWx0aShmZCwgMiwgbWluKTsKPiAtCW1pblswXSAtPSBzdGFydFswXTsKPiAtCW1pblsx XSAtPSBzdGFydFsxXTsKPiArCXBtdV9yZWFkX211bHRpKGZkLCAyLCB2YWwpOwo+ICsJbWluWzBd ID0gMWU5Kih2YWxbMF0gLSBzdGFydFswXSkgLyBzbGVwdDsKPiArCW1pblsxXSA9IDFlOSoodmFs WzFdIC0gc3RhcnRbMV0pIC8gc2xlcHQ7Cj4gICAKPiAgIAlpZ3Rfc3Bpbl9iYXRjaF9mcmVlKGdl bV9mZCwgc3Bpbik7Cj4gKwlnZW1fcXVpZXNjZW50X2dwdShnZW1fZmQpOyAvKiBEb24ndCBsZWFr IGJ1c3kgYm8gaW50byB0aGUgbmV4dCBwaGFzZSAqLwo+ICAgCj4gICAJdXNsZWVwKDFlNik7Cj4g ICAKPiBAQCAtOTg3LDE3ICs5ODksMTggQEAgdGVzdF9mcmVxdWVuY3koaW50IGdlbV9mZCkKPiAg IAlpZ3RfcmVxdWlyZShpZ3Rfc3lzZnNfc2V0X3UzMihzeXNmcywgImd0X21pbl9mcmVxX21oeiIs IG1heF9mcmVxKSk7Cj4gICAJaWd0X3JlcXVpcmUoaWd0X3N5c2ZzX2dldF91MzIoc3lzZnMsICJn dF9taW5fZnJlcV9taHoiKSA9PSBtYXhfZnJlcSk7Cj4gICAKPiArCWdlbV9xdWllc2NlbnRfZ3B1 KGdlbV9mZCk7Cj4gKwlzcGluID0gaWd0X3NwaW5fYmF0Y2hfbmV3KGdlbV9mZCwgMCwgSTkxNV9F WEVDX1JFTkRFUiwgMCk7Cj4gICAJcG11X3JlYWRfbXVsdGkoZmQsIDIsIHN0YXJ0KTsKPiAgIAo+ IC0Jc3BpbiA9IGlndF9zcGluX2JhdGNoX25ldyhnZW1fZmQsIDAsIEk5MTVfRVhFQ19SRU5ERVIs IDApOwo+IC0JaWd0X3NwaW5fYmF0Y2hfc2V0X3RpbWVvdXQoc3BpbiwgZHVyYXRpb25fbnMpOwo+ IC0JZ2VtX3N5bmMoZ2VtX2ZkLCBzcGluLT5oYW5kbGUpOwo+ICsJc2xlcHQgPSBtZWFzdXJlZF91 c2xlZXAoYmF0Y2hfZHVyYXRpb25fbnMgLyAxMDAwKTsKPiAgIAo+IC0JcG11X3JlYWRfbXVsdGko ZmQsIDIsIG1heCk7Cj4gLQltYXhbMF0gLT0gc3RhcnRbMF07Cj4gLQltYXhbMV0gLT0gc3RhcnRb MV07Cj4gKwlwbXVfcmVhZF9tdWx0aShmZCwgMiwgdmFsKTsKPiArCW1heFswXSA9IDFlOSoodmFs WzBdIC0gc3RhcnRbMF0pIC8gc2xlcHQ7Cj4gKwltYXhbMV0gPSAxZTkqKHZhbFsxXSAtIHN0YXJ0 WzFdKSAvIHNsZXB0Owo+ICAgCj4gICAJaWd0X3NwaW5fYmF0Y2hfZnJlZShnZW1fZmQsIHNwaW4p Owo+ICsJZ2VtX3F1aWVzY2VudF9ncHUoZ2VtX2ZkKTsKPiAgIAo+ICAgCS8qCj4gICAJICogUmVz dG9yZSBtaW4vbWF4Lgo+IEBAIC0xMDA4LDggKzEwMTEsMTIgQEAgdGVzdF9mcmVxdWVuY3koaW50 IGdlbV9mZCkKPiAgIAkJCSBtaW5fZnJlcSwgaWd0X3N5c2ZzX2dldF91MzIoc3lzZnMsICJndF9t aW5fZnJlcV9taHoiKSk7Cj4gICAJY2xvc2UoZmQpOwo+ICAgCj4gLQlpZ3RfYXNzZXJ0KG1pblsw XSA8IG1heFswXSk7Cj4gLQlpZ3RfYXNzZXJ0KG1pblsxXSA8IG1heFsxXSk7Cj4gKwlpZ3RfaW5m bygiTWluIGZyZXF1ZW5jeTogcmVxdWVzdGVkICUuMWYsIGFjdHVhbCAlLjFmXG4iLAo+ICsJCSBt aW5bMF0sIG1pblsxXSk7Cj4gKwlpZ3RfaW5mbygiTWF4IGZyZXF1ZW5jeTogcmVxdWVzdGVkICUu MWYsIGFjdHVhbCAlLjFmXG4iLAo+ICsJCSBtYXhbMF0sIG1heFsxXSk7Cj4gKwlhc3NlcnRfd2l0 aGluX2Vwc2lsb24obWluWzBdLCBtaW5fZnJlcSwgdG9sZXJhbmNlKTsKPiArCWFzc2VydF93aXRo aW5fZXBzaWxvbihtYXhbMF0sIG1heF9mcmVxLCB0b2xlcmFuY2UpOwo+ICAgfQo+ICAgCj4gICBz dGF0aWMgYm9vbCB3YWl0X2Zvcl9yYzYoaW50IGZkKQo+IAoKUmV2aWV3ZWQtYnk6IFR2cnRrbyBV cnN1bGluIDx0dnJ0a28udXJzdWxpbkBpbnRlbC5jb20+CgpSZWdhcmRzLAoKVHZydGtvCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWls aW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZy ZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=