From mboxrd@z Thu Jan 1 00:00:00 1970 From: Coly Li Subject: Re: [PATCH 3/4] dm stats: report histogram of latencies Date: Sun, 14 Jun 2015 01:03:46 +0800 Message-ID: <557C6272.8070200@gmail.com> References: Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Mikulas Patocka , "Alasdair G. Kergon" , Mike Snitzer Cc: Tao Ma , dm-devel@redhat.com, Laurence Oberman , Robin Dong List-Id: dm-devel.ids 5ZyoIDE1LzYvMTAg5LiK5Y2INToyMiwgTWlrdWxhcyBQYXRvY2thIOWGmemBkzoKPiBUaGlzIHBh dGNoIGFkZHMgYW4gb3B0aW9uIHRvIGRtIHN0YXRpc3RpY3MgdG8gY29sbGVjdCBhbmQgcmVwb3J0 IHRoZQo+IGhpc3RvZ3JhbSBvZiBsYXRlbmNpZXMuCj4KPiBTaWduZWQtb2ZmLWJ5OiBNaWt1bGFz IFBhdG9ja2EgPG1wYXRvY2thQHJlZGhhdC5jb20+Cj4KPiAtLS0KPiAgRG9jdW1lbnRhdGlvbi9k ZXZpY2UtbWFwcGVyL3N0YXRpc3RpY3MudHh0IHwgICAyMSArKy0KPiAgZHJpdmVycy9tZC9kbS1z dGF0cy5jICAgICAgICAgICAgICAgICAgICAgIHwgIDIwMSArKysrKysrKysrKysrKysrKysrKysr KysrLS0tLQo+ICAyIGZpbGVzIGNoYW5nZWQsIDE5NiBpbnNlcnRpb25zKCspLCAyNiBkZWxldGlv bnMoLSkKPgo+IEluZGV4OiBsaW51eC00LjEtcmM3L2RyaXZlcnMvbWQvZG0tc3RhdHMuYwo+ID09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT0KPiAtLS0gbGludXgtNC4xLXJjNy5vcmlnL2RyaXZlcnMvbWQvZG0tc3RhdHMuYwky MDE1LTA2LTA4IDE2OjM4OjQzLjAwMDAwMDAwMCArMDIwMAo+ICsrKyBsaW51eC00LjEtcmM3L2Ry aXZlcnMvbWQvZG0tc3RhdHMuYwkyMDE1LTA2LTA4IDE3OjAyOjAxLjAwMDAwMDAwMCArMDIwMAo+ IEBAIC0yOSw2ICsyOSw3IEBAIHN0cnVjdCBkbV9zdGF0X3BlcmNwdSB7Cj4gIAl1bnNpZ25lZCBs b25nIGxvbmcgaW9fdGlja3NbMl07Cj4gIAl1bnNpZ25lZCBsb25nIGxvbmcgaW9fdGlja3NfdG90 YWw7Cj4gIAl1bnNpZ25lZCBsb25nIGxvbmcgdGltZV9pbl9xdWV1ZTsKPiArCXVuc2lnbmVkIGxv bmcgbG9uZyAqaGlzdG9ncmFtOwo+ICB9Owo+ICAKPiAgc3RydWN0IGRtX3N0YXRfc2hhcmVkIHsK W3NuaXBdCj4gQEAgLTYxOSw2ICs3MDAsMTEgQEAgc3RhdGljIHZvaWQgX19kbV9zdGF0X2luaXRf dGVtcG9yYXJ5X3Blcgo+ICAJCXNoYXJlZC0+dG1wLmlvX3RpY2tzW1dSSVRFXSArPSBBQ0NFU1Nf T05DRShwLT5pb190aWNrc1tXUklURV0pOwo+ICAJCXNoYXJlZC0+dG1wLmlvX3RpY2tzX3RvdGFs ICs9IEFDQ0VTU19PTkNFKHAtPmlvX3RpY2tzX3RvdGFsKTsKPiAgCQlzaGFyZWQtPnRtcC50aW1l X2luX3F1ZXVlICs9IEFDQ0VTU19PTkNFKHAtPnRpbWVfaW5fcXVldWUpOwo+ICsJCWlmIChzLT5u X2hpc3RvZ3JhbV9lbnRyaWVzKSB7Cj4gKwkJCXVuc2lnbmVkIGk7Cj4gKwkJCWZvciAoaSA9IDA7 IGkgPCBzLT5uX2hpc3RvZ3JhbV9lbnRyaWVzICsgMTsgaSsrKQo+ICsJCQkJc2hhcmVkLT50bXAu aGlzdG9ncmFtW2ldICs9IEFDQ0VTU19PTkNFKHAtPmhpc3RvZ3JhbVtpXSk7CgpzLT5uX2hpc3Rv Z3JhbV9lbnRyaWVzICsgMSBpbiBmb3IoKSBsb29waW5nIHdpbGwgYmUgY2FsY3VsYXRlZCBtYW55 IHRpbWVzLCBtYXliZSB0aGlzIHdheSBjb3VsZCBiZSBiZXR0ZXIsCgorCQlpZiAocy0+bl9oaXN0 b2dyYW1fZW50cmllcykgeworCQkJdW5zaWduZWQgaSwgajsKKwkJCWogPSBzLT5uX2hpc3RvZ3Jh bV9lbnRyaWVzICsgMTsKKwkJCWZvciAoaSA9IDA7IGkgPCBqOyBpKyspCisJCQkJc2hhcmVkLT50 bXAuaGlzdG9ncmFtW2ldICs9IEFDQ0VTU19PTkNFKHAtPmhpc3RvZ3JhbVtpXSk7Cgo+ICsJCX0K PiAgCX0KPiAgfQo+ICAKPiBAQCAtNjQ4LDYgKzczNCwxNSBAQCBzdGF0aWMgdm9pZCBfX2RtX3N0 YXRfY2xlYXIoc3RydWN0IGRtX3N0Cj4gIAkJcC0+aW9fdGlja3NfdG90YWwgLT0gc2hhcmVkLT50 bXAuaW9fdGlja3NfdG90YWw7Cj4gIAkJcC0+dGltZV9pbl9xdWV1ZSAtPSBzaGFyZWQtPnRtcC50 aW1lX2luX3F1ZXVlOwo+ICAJCWxvY2FsX2lycV9lbmFibGUoKTsKPiArCQlpZiAocy0+bl9oaXN0 b2dyYW1fZW50cmllcykgewo+ICsJCQl1bnNpZ25lZCBpOwo+ICsJCQlmb3IgKGkgPSAwOyBpIDwg cy0+bl9oaXN0b2dyYW1fZW50cmllcyArIDE7IGkrKykgewpTYW1lIHNpdHVhdGlvbiBoZXJlLAoK KyAgICAgICAgICAgIHVuc2lnbmVkIGksIGo7CisgICAgICAgICAgICBqID0gcy0+bl9oaXN0b2dy YW1fZW50cmllcyArIDE7CisgICAgICAgICAgICBmb3IgKGkgPSAwOyBpIDwgajsgaSsrKSB7Cgo+ ICsJCQkJbG9jYWxfaXJxX2Rpc2FibGUoKTsKPiArCQkJCXAgPSAmcy0+c3RhdF9wZXJjcHVbc21w X3Byb2Nlc3Nvcl9pZCgpXVt4XTsKPiArCQkJCXAtPmhpc3RvZ3JhbVtpXSAtPSBzaGFyZWQtPnRt cC5oaXN0b2dyYW1baV07Cj4gKwkJCQlsb2NhbF9pcnFfZW5hYmxlKCk7Cj4gKwkJCX0KPiArCQl9 Cj4gIAl9Cj4gIH0KPiAgCj4gQEAgLTczNyw3ICs4MzIsNyBAQCBzdGF0aWMgaW50IGRtX3N0YXRz X3ByaW50KHN0cnVjdCBkbV9zdGF0Cj4gIAo+ICAJCV9fZG1fc3RhdF9pbml0X3RlbXBvcmFyeV9w ZXJjcHVfdG90YWxzKHNoYXJlZCwgcywgeCk7Cj4gIAo+IC0JCURNRU1JVCgiJWxsdSslbGx1ICVs bHUgJWxsdSAlbGx1ICVsbHUgJWxsdSAlbGx1ICVsbHUgJWxsdSAlZCAlbGx1ICVsbHUgJWxsdSAl bGx1XG4iLAo+ICsJCURNRU1JVCgiJWxsdSslbGx1ICVsbHUgJWxsdSAlbGx1ICVsbHUgJWxsdSAl bGx1ICVsbHUgJWxsdSAlZCAlbGx1ICVsbHUgJWxsdSAlbGx1IiwKPiAgCQkgICAgICAgKHVuc2ln bmVkIGxvbmcgbG9uZylzdGFydCwKPiAgCQkgICAgICAgKHVuc2lnbmVkIGxvbmcgbG9uZylzdGVw LAo+ICAJCSAgICAgICBzaGFyZWQtPnRtcC5pb3NbUkVBRF0sCj4gQEAgLTc1Myw2ICs4NDgsMTMg QEAgc3RhdGljIGludCBkbV9zdGF0c19wcmludChzdHJ1Y3QgZG1fc3RhdAo+ICAJCSAgICAgICBk bV9qaWZmaWVzX3RvX21zZWM2NChzLCBzaGFyZWQtPnRtcC50aW1lX2luX3F1ZXVlKSwKPiAgCQkg ICAgICAgZG1famlmZmllc190b19tc2VjNjQocywgc2hhcmVkLT50bXAuaW9fdGlja3NbUkVBRF0p LAo+ICAJCSAgICAgICBkbV9qaWZmaWVzX3RvX21zZWM2NChzLCBzaGFyZWQtPnRtcC5pb190aWNr c1tXUklURV0pKTsKPiArCQlpZiAocy0+bl9oaXN0b2dyYW1fZW50cmllcykgewo+ICsJCQl1bnNp Z25lZCBpOwo+ICsJCQlmb3IgKGkgPSAwOyBpIDwgcy0+bl9oaXN0b2dyYW1fZW50cmllcyArIDE7 IGkrKykgewpTYW1lIHNpdHVhdGlvbiBoZXJlLAoKKyAgICAgICAgICAgICAgICAgICAgICAgIHVu c2lnbmVkIGksIGo7CisgICAgICAgICAgICAgICAgICAgICAgICBqID0gcy0+bl9oaXN0b2dyYW1f ZW50cmllcyArIDE7CisgICAgICAgICAgICAgICAgICAgICAgICBmb3IgKGkgPSAwOyBpIDwgajsg aSsrKSB7Cgo+ICsJCQkJRE1FTUlUKCIlcyVsbHUiLCAhaSA/ICIgIiA6ICI6Iiwgc2hhcmVkLT50 bXAuaGlzdG9ncmFtW2ldKTsKPiArCQkJfQo+ICsJCX0KPiArCQlETUVNSVQoIlxuIik7Cj4gIAo+ ICAJCWlmICh1bmxpa2VseShzeiArIDEgPj0gbWF4bGVuKSkKPiAgCQkJZ290byBidWZmZXJfb3Zl cmZsb3c7CltzbmlwXQoKQ29seQoKLS0KZG0tZGV2ZWwgbWFpbGluZyBsaXN0CmRtLWRldmVsQHJl ZGhhdC5jb20KaHR0cHM6Ly93d3cucmVkaGF0LmNvbS9tYWlsbWFuL2xpc3RpbmZvL2RtLWRldmVs