From mboxrd@z Thu Jan 1 00:00:00 1970 From: Milian Wolff Subject: Re: [PATCH] perf tools: Add dedicated unwind addr_space member into thread struct Date: Wed, 06 Apr 2016 23:15:27 +0200 Message-ID: <2529332.MbcSn26IoS@agathebauer> References: <1894563.GPSC8z33rH@agathebauer> <20160405083524.GB17232@krava.brq.redhat.com> <20160406154657.GA14971@krava.brq.redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart4236050.HaRfuyQHAV"; micalg="sha1"; protocol="application/pkcs7-signature" Return-path: Received: from mail.kdab.com ([176.9.126.58]:41067 "EHLO mail.kdab.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754046AbcDHLDS (ORCPT ); Fri, 8 Apr 2016 07:03:18 -0400 In-Reply-To: <20160406154657.GA14971@krava.brq.redhat.com> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Jiri Olsa Cc: Arnaldo Carvalho de Melo , perf group --nextPart4236050.HaRfuyQHAV Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" On Mittwoch, 6. April 2016 17:46:57 CEST Jiri Olsa wrote: > On Tue, Apr 05, 2016 at 10:35:24AM +0200, Jiri Olsa wrote: > > On Mon, Apr 04, 2016 at 11:17:11PM +0200, Milian Wolff wrote: > > > > SNIP > > > > > 7f688a5ef0c4 usleep (/usr/lib/libc-2.23.so) > > > 5582244227cd main (/tmp/ex_sleep) > > > > > > 1001.702 ( 0.059 ms): ex_sleep/4390 nanosleep(rqtp: 0x7ffe4d16eec0 > > > > > > ) = 0 > > > > > > 20379e syscall_slow_exit_work ([kernel.kallsyms]) > > > 203bc4 syscall_return_slowpath ([kernel.kallsyms]) > > > 797248 int_ret_from_sys_call ([kernel.kallsyms]) > > > > > > 7f688a5c5600 __nanosleep (/usr/lib/libc-2.23.so) > > > 7f688a5ef0c4 usleep (/usr/lib/libc-2.23.so) > > > 5582244227d7 main (/tmp/ex_sleep) > > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > > Is there a way to increase the event buffer or something like that to > > > not lose events when the costly dwarf unwinding happens for the first > > > time? Consecutive unwinding is cached by libunwind and much faster. > > > > not sure about perf trace, but there's -m option available for perf record > > that allows you to increase the buffer size > > > > > Alternatively, I could try to unwind in the `sys_enter`, but then I'd > > > need to buffer the output to print the trace after the duration line... > > > > > > How would you guys handle this situation? > > > > > > Also, Jiri, Arnaldo - what would be your suggestion on how to handle the > > > `thread::priv` situation - I doubt my naive `priv2` approach is > > > acceptable. > > > > yea, I think one priv is more than enough ;-) > > > > I think we want to move the the unwinder usage of this field into separate > > field > need to run test over this, but will try to post it this week > let me know if this solution would work for you Yes, works for me, thanks a lot! Feel free to add Tested-by: Milian Wolff -- Milian Wolff | milian.wolff@kdab.com | Software Engineer KDAB (Deutschland) GmbH&Co KG, a KDAB Group company Tel: +49-30-521325470 KDAB - The Qt Experts --nextPart4236050.HaRfuyQHAV Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIUdzCCBGYw ggNOoAMCAQICEFEmCpMc4n+cw6VfeeByroIwDQYJKoZIhvcNAQEFBQAwgZMxCzAJBgNVBAYTAlVT MQswCQYDVQQIEwJVVDEXMBUGA1UEBxMOU2FsdCBMYWtlIENpdHkxHjAcBgNVBAoTFVRoZSBVU0VS VFJVU1QgTmV0d29yazEhMB8GA1UECxMYaHR0cDovL3d3dy51c2VydHJ1c3QuY29tMRswGQYDVQQD ExJVVE4gLSBEQVRBQ29ycCBTR0MwHhcNMDUwNjA3MDgwOTEwWhcNMTkwNjI0MTkwNjMwWjBvMQsw CQYDVQQGEwJTRTEUMBIGA1UEChMLQWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFkZFRydXN0IEV4dGVy bmFsIFRUUCBOZXR3b3JrMSIwIAYDVQQDExlBZGRUcnVzdCBFeHRlcm5hbCBDQSBSb290MIIBIjAN BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAt/caM+byAAQtOeBOW+0fvGwPzbX6I7bO3psRM5ek KUx9k5+9SryT7QMa44/P5W1QWtaXKZRagLBJetsulf24yr83OC0ePpFBrXBWx/BPP+gynnTKyJBU 6cZfD3idmkA8Dqxhql4Uj56HoWpQ3NeaTq8Fs6ZxlJxxs1BgCscTnTgHhgKo6ahpJhiQq0ywTyOr Ok+E2N/On+Fpb7vXQtdrROTHre5tQV9yWnEIN7N5ZaRZoJQ39wAvDcKSctrQOHLbFKhFxF0qfbe0 1sTurM0TRLfJK91DACX6YblpalgjEbenM49WdVn1zSnXRrcKK2W200JvFbK4e/vv6V1T1TRaJwID AQABo4HYMIHVMB8GA1UdIwQYMBaAFFMy0bPPf/rg8aBdhU6S0p5FHbRPMB0GA1UdDgQWBBStvZh6 NLQm9/rEJlTvA73gJMtUGjAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/BAUwAwEB/zARBglghkgB hvhCAQEEBAMCAQIwIAYDVR0lBBkwFwYKKwYBBAGCNwoDAwYJYIZIAYb4QgQBMD0GA1UdHwQ2MDQw MqAwoC6GLGh0dHA6Ly9jcmwudXNlcnRydXN0LmNvbS9VVE4tREFUQUNvcnBTR0MuY3JsMA0GCSqG SIb3DQEBBQUAA4IBAQDG7lMXaBSyUSIekFgNlP298XDlhi3DNjGPVEhG5y0IN7xsCmDhDq1RNOAS k+m+uKu4JrTplj0oj65kB/7gAezF45HrGKDxdX7bCuafkduvrnXfI5Fo3RcAWkv/ZGxw6wEa0JDZ x6bWbfYT5P+1ydIeKsuxJUMmeNkwm04NHr5p79/q/i2zzPmw3bUUypHUsrWl+wEZo0d5n52MlYc0 +B84kto2phH6a+tr6dxFeBU5BtdNQeQhyNwvh9G3v0hgdaViyyTeO2GgKSCmvsVsnMTpCmki75E6 +iav0VtBpzri+DgHQqvBW/jObboPBD8yNKzcBCjXcDAUJgbE5JuY1c94MIIEnTCCA4WgAwIBAgIQ ND3pK6wnNP+PyzSU+8xwVDANBgkqhkiG9w0BAQUFADBvMQswCQYDVQQGEwJTRTEUMBIGA1UEChML QWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFkZFRydXN0IEV4dGVybmFsIFRUUCBOZXR3b3JrMSIwIAYD VQQDExlBZGRUcnVzdCBFeHRlcm5hbCBDQSBSb290MB4XDTA1MDYwNzA4MDkxMFoXDTIwMDUzMDEw NDgzOFowga4xCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJVVDEXMBUGA1UEBxMOU2FsdCBMYWtlIENp dHkxHjAcBgNVBAoTFVRoZSBVU0VSVFJVU1QgTmV0d29yazEhMB8GA1UECxMYaHR0cDovL3d3dy51 c2VydHJ1c3QuY29tMTYwNAYDVQQDEy1VVE4tVVNFUkZpcnN0LUNsaWVudCBBdXRoZW50aWNhdGlv biBhbmQgRW1haWwwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCyOYWk8n2rQTtiRjeu zcFgdbw5ZflKGkeiucxIzGqY1U01GbmkQuXOSeKKLx580jEHx060g2SdLinVomTEhb2FUTV5pE5o kHsceqSSqBfymBXyk8zJpDKVuwxPML2YoAuL5W4bokb6eLyib6tZXqUvz8rabaov66yhs2qqty5n NYt54R5piOLmRs2gpeq+C852OnoOm+r82idbPXMfIuZIYcZM82mxqC4bttQxICy8goqOpA6l14lD /BZarx1x1xFZ2rqHDa/68+HC8KTFZ4zW1lQ63gqkugN3s2XI/R7TdGKqGMpokx6hhX71R2XL+E1X KHTSNP8wtu72YjAUjCzrAgMBAAGjgfQwgfEwHwYDVR0jBBgwFoAUrb2YejS0Jvf6xCZU7wO94CTL VBowHQYDVR0OBBYEFImCZ33EnSZwAEu0UEh83j2uBG59MA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMB Af8EBTADAQH/MBEGA1UdIAQKMAgwBgYEVR0gADBEBgNVHR8EPTA7MDmgN6A1hjNodHRwOi8vY3Js LnVzZXJ0cnVzdC5jb20vQWRkVHJ1c3RFeHRlcm5hbENBUm9vdC5jcmwwNQYIKwYBBQUHAQEEKTAn MCUGCCsGAQUFBzABhhlodHRwOi8vb2NzcC51c2VydHJ1c3QuY29tMA0GCSqGSIb3DQEBBQUAA4IB AQABvJzjYyiw8zEBwt973WKgAZ0jMQ+cknNTUeofTPrWn8TKL2d+eDMPdBa5kYeR9Yom+mRwANge +QsEYlCHk4HU2vUj2zS7hVa0cDRueIM3HoUcxREVkl+HF72sav3xwtHMiV+xfPA+UfI183zsYJhr Oivg79+zfYbrtRv1W+yifJgT1wBQudEtc94DeHThBYUxXsuauZ2UxrmUN3Vy3ET7Z+jw+iUeUqfa JelH4KDHPKBOsQo2+3dIn++Xivu0/uOUFKiDvFwtP9JgcWDuwnGCDOmINuPaILSjoGyqlku4gI51 ykkH9jsUut/cBdmf2+Cy5k2geCbn5y1uf1/GHogVMIIFGjCCBAKgAwIBAgIQbRnqpxlPajMi5iIy eqpx3jANBgkqhkiG9w0BAQUFADCBrjELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAlVUMRcwFQYDVQQH Ew5TYWx0IExha2UgQ2l0eTEeMBwGA1UEChMVVGhlIFVTRVJUUlVTVCBOZXR3b3JrMSEwHwYDVQQL ExhodHRwOi8vd3d3LnVzZXJ0cnVzdC5jb20xNjA0BgNVBAMTLVVUTi1VU0VSRmlyc3QtQ2xpZW50 IEF1dGhlbnRpY2F0aW9uIGFuZCBFbWFpbDAeFw0xMTA0MjgwMDAwMDBaFw0yMDA1MzAxMDQ4Mzha MIGTMQswCQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdT YWxmb3JkMRowGAYDVQQKExFDT01PRE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVu dCBBdXRoZW50aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOC AQ8AMIIBCgKCAQEAkoSEW0tXmNReL4uk4UDIo1NYX2Zl8TJO958yfVXQeExVt0KU4PkncQfFxmmk uTLE8UAakMwnVmJ/F7Vxaa7lIBvky2NeYMqiQfZq4aP/uN8fSG1lQ4wqLitjOHffsReswtqCAtbU MmrUZ28gE49cNfrlVICv2HEKHTcKAlBTbJUdqRAUtJmVWRIx/wmi0kzcUtve4kABW0ho3cVKtODt JB86r3FfB+OsvxQ7sCVxaD30D9YXWEYVgTxoi4uDD216IVfmNLDbMn7jSuGlUnJkJpFOpZIP/+Cx YP0ab2hRmWONGoulzEKbm30iY9OpoPzOnpDfRBn0XFs1uhbzp5v/wQIDAQABo4IBSzCCAUcwHwYD VR0jBBgwFoAUiYJnfcSdJnAAS7RQSHzePa4Ebn0wHQYDVR0OBBYEFHoTTgB0W8Z4Y2QnwS/ioFu8 ecV7MA4GA1UdDwEB/wQEAwIBBjASBgNVHRMBAf8ECDAGAQH/AgEAMBEGA1UdIAQKMAgwBgYEVR0g ADBYBgNVHR8EUTBPME2gS6BJhkdodHRwOi8vY3JsLnVzZXJ0cnVzdC5jb20vVVROLVVTRVJGaXJz dC1DbGllbnRBdXRoZW50aWNhdGlvbmFuZEVtYWlsLmNybDB0BggrBgEFBQcBAQRoMGYwPQYIKwYB BQUHMAKGMWh0dHA6Ly9jcnQudXNlcnRydXN0LmNvbS9VVE5BZGRUcnVzdENsaWVudF9DQS5jcnQw JQYIKwYBBQUHMAGGGWh0dHA6Ly9vY3NwLnVzZXJ0cnVzdC5jb20wDQYJKoZIhvcNAQEFBQADggEB AIXWvnhXVW0zf0RS/kLVBqgBA4CK+w2y/Uq/9q9BSfUbWsXSrRtzbj7pJnzmTJjBMCjfy/tCPKEl Pgp11tA9OYZm0aGbtU2bb68obB2v5ep0WqjascDxdXovnrqTecr+4pEeVnSy+I3T4ENyG+2P/WA5 IEf7i686ZUg8mD2lJb+972DgSeUWyOs/Q4Pw4O4NwdPNM1+b0L1garM7/vrUyTo8H+2b/5tJM75C KTmD7jNpLoKdRU2oadqAGx490hpdfEeZpZsIbRKZhtZdVwcbpzC+S0lEuJB+ytF5OOu0M/qgOl0m WJ5hVRi0IdWZ1eBDQEIwvuql55TSsP7zdfl/bucwggZKMIIFMqADAgECAhByCOhbkTwXiJtaa0d5 K5u0MA0GCSqGSIb3DQEBBQUAMIGTMQswCQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5j aGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQKExFDT01PRE8gQ0EgTGltaXRlZDE5MDcG A1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMB4X DTE0MDYwMjAwMDAwMFoXDTE3MDYwMTIzNTk1OVowggFZMQswCQYDVQQGEwJTRTEPMA0GA1UEERMG NjgzIDMxMRIwEAYDVQQIEwlWYWVybWxhbmQxEDAOBgNVBAcTB0hhZ2ZvcnMxGDAWBgNVBAkTD05v cnJpbmdzIHZhZWcgMjEPMA0GA1UEEhMGQm94IDMwMSYwJAYDVQQKDB1LbGFyw6RsdmRhbGVucyBE YXRha29uc3VsdCBBQjEdMBsGA1UECxMUQSBLREFCIEdyb3VwIENvbXBhbnkxQzBBBgNVBAsMOklz c3VlZCB0aHJvdWdoIEtsYXLDpGx2ZGFsZW5zIERhdGFrb25zdWx0IEFCIEUtUEtJIE1hbmFnZXIx HzAdBgNVBAsTFkNvcnBvcmF0ZSBTZWN1cmUgRW1haWwxFTATBgNVBAMTDE1pbGlhbiBXb2xmZjEk MCIGCSqGSIb3DQEJARYVbWlsaWFuLndvbGZmQGtkYWIuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOC AQ8AMIIBCgKCAQEAwirYPAOcWQk9jaCoEAn84PwINg/NDs3PxsEd34f27AfCqJepwIF+ikMuBBxt mm1pieQwU9fcFrE4CXPCdYxfFOdcbJJ58Xzog5aFrJHnYGEFIL8KVvdBvAFeP/AJPaY2lg1JWnVI 1jwO74VmUGMyvMG286wpwW3hWO3sepZZQN3tvXyd9EgD72AiImkvw43+BW4xy8ptOd3TvEwCJ+uN x8v+uILsRLvKcmSrUsLpo7No2HoifWX1doKHKSwYVVqmOT/rjJWxF98j4w2kTKRsWdQ4ENlqNpjW zlbtB6TM2mrnInefzALbIoLLQ2E2NFCaMVsczf7RFsMxUepM9KQQ5QIDAQABo4IBzzCCAcswHwYD VR0jBBgwFoAUehNOAHRbxnhjZCfBL+KgW7x5xXswHQYDVR0OBBYEFGSjHixs9BD9OyGskYjMX7mi P+fiMA4GA1UdDwEB/wQEAwIFoDAMBgNVHRMBAf8EAjAAMB0GA1UdJQQWMBQGCCsGAQUFBwMEBggr BgEFBQcDAjBGBgNVHSAEPzA9MDsGDCsGAQQBsjEBAgEDBTArMCkGCCsGAQUFBwIBFh1odHRwczov L3NlY3VyZS5jb21vZG8ubmV0L0NQUzBXBgNVHR8EUDBOMEygSqBIhkZodHRwOi8vY3JsLmNvbW9k b2NhLmNvbS9DT01PRE9DbGllbnRBdXRoZW50aWNhdGlvbmFuZFNlY3VyZUVtYWlsQ0EuY3JsMIGI BggrBgEFBQcBAQR8MHowUgYIKwYBBQUHMAKGRmh0dHA6Ly9jcnQuY29tb2RvY2EuY29tL0NPTU9E T0NsaWVudEF1dGhlbnRpY2F0aW9uYW5kU2VjdXJlRW1haWxDQS5jcnQwJAYIKwYBBQUHMAGGGGh0 dHA6Ly9vY3NwLmNvbW9kb2NhLmNvbTAgBgNVHREEGTAXgRVtaWxpYW4ud29sZmZAa2RhYi5jb20w DQYJKoZIhvcNAQEFBQADggEBAFvi067uXCOkiUH/D6rv4gV0/e+e8DzcvbbsUxAC5nwDXBv+47ds l7j8NrZstZraVz35WEWgksNmnyghcuBKzKcN3kY1KNn/ERc9wvns/0dI+yj39L0eSMzchUZoV6GY MtPfmLofPvUBbDesl97JQXF9vpk8FIVsI1UKKrLzfoKhue5abQHXurSFa0ts1UPmSh2Y8/QCQlFN lCv8ISyEwVCAkhdIqxRc3hslooBhcRVUrYhRdCLlNN6Od8yuLE9sKWH/K4wg/BpnjCJmGp4GQhU8 DUG2r0CbOa+iZQKTWUgwdGU3Jr+WcOan/JaNzBuKk1GM3D+WcljoU7ZWtoqXPzgxggJaMIICVgIB ATCBqDCBkzELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE BxMHU2FsZm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxOTA3BgNVBAMTMENPTU9ETyBD bGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQQIQcgjoW5E8F4ibWmtHeSub tDAJBgUrDgMCGgUAoIGHMBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8X DTE2MDQwNjIxMTUyN1owIwYJKoZIhvcNAQkEMRYEFEuzHlYoTSJtB5N6qhptsavK5xvgMCgGCSqG SIb3DQEJDzEbMBkwCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA0GCSqGSIb3DQEBAQUABIIBAEyF 5/m+JgeUeB+DTVp1xcx1gNrfV27CkPhM5+ah9W0r+btpxnD9jvAD+Goy6GNOTpHVfLylT/wOJ5Ku FoyP6miZ7H7obfiFvda9jXyKZsYyjctlsKQ7kvwAP2660fVRss1uFgSlrswFrJVqzn1esnynb04b KGVflzdeKBSmk4ga6vEvNNNtbYP0kijT5sN7E493VrWsyOTkC87NFVdk8UO1jx7RXHOEes4RWkuY mdwLK2v05/fPBus+1b53njBwwk5NFFnjTRxn+3teXVLPlP52Yhla1oSKnXK6oOayAZfy1kmGmXfm H8qre+3HGq/+E9C0Bpfb9vs1s80P2+5DNxYAAAAAAAA= --nextPart4236050.HaRfuyQHAV--