Date: Wed, 24 Oct 2018 00:34:12 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Ryan Stone <rysto32@gmail.com> Cc: freebsd-hackers@freebsd.org, cse.cem@gmail.com, Alan Somers <asomers@freebsd.org> Subject: Re: What is wrong with dtrace's stack()? Message-ID: <168122586.20181024003412@serebryakov.spb.ru> In-Reply-To: <CAFMmRNz35Ay82NcMnUkSAvpyU5p2m9ykiji1xXcbEanH9A2H%2Bw@mail.gmail.com> References: <170994671.20181021201021@serebryakov.spb.ru> <CAG6CVpVCe-8OVU%2BKEyAh8swFSAjRshNcNLN0tjAS3W8bZxyrTA@mail.gmail.com> <475670271.20181022003734@serebryakov.spb.ru> <CAOtMX2goztCYJXM72WNR711DEBEKAGk1zFHF=NpE4UiVAF2bAQ@mail.gmail.com> <234d745d-37a9-9610-15b9-0f5cd5af21bf@FreeBSD.org> <b30f2080-1037-1752-60fb-6d22e28ce90d@FreeBSD.org> <CAFMmRNz35Ay82NcMnUkSAvpyU5p2m9ykiji1xXcbEanH9A2H%2Bw@mail.gmail.com>
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Hello Ryan, Monday, October 22, 2018, 11:50:29 PM, you wrote: > Adding -fno-optimize-sibling-calls to the compiler flags will eliminate the TCO. Stacks are better but still strange. For example I have such stack (which I like better than previous): kernel`lock_delay+0x72 kernel`sosend_generic+0x112c kernel`sosend+0x79 kernel`soo_write+0x6b kernel`fo_write+0x4a kernel`dofilewrite+0xcd kernel`kern_writev+0x79 kernel`sys_write+0x8f kernel`syscallenter+0x774 kernel`amd64_syscall+0x1b kernel`0xffffffff80cebf6d According to addr2line `sosend_generic+0x112c' is https://svnweb.freebsd.org/base/head/sys/kern/uipc_socket.c?revision=339419&view=markup#l1579 Which is call to protocol-specific send function. Where is this function (it should be tcp for sure)?! -- Best regards, Lev mailto:lev@FreeBSD.org
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