From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhu Lingshan Subject: Missing tgtd symbols in "perf top" Date: Fri, 30 Jan 2015 11:14:37 +0800 Message-ID: <54CAF71D.4030606@suse.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: stgt-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: stgt@vger.kernel.org Cc: fUJITA Tomonori Hi experts! I am facing a symbols problem when run perf (a software can analyze performance of a program) today. I executed command line "perf record -p 6625 -g" to collect the report of tgtd (pid is 6625). Then I use "perf report -g" to read it. When I zoom into tgtd DSO, I found the symbol name on the top is missing, only address shown. But other symbols are fine. tgt version : tgt-1.0.44-2.70.x86_64 perf version: perf-3.12.28-33.33.x86_64 OS: SUSE Linux Enterprise Server 12 The scene: Samples: 5K of event 'cpu-clock', Event count (approx.): 1435000000, DSO: tgtd + 43.99% tgtd [.] 0x0000000000012ac0 + 11.32% tgtd [.] iscsi_rx_handler + 9.90% tgtd [.] iscsi_tx_handler + 4.48% tgtd [.] scsi_cmd_perform + 3.87% tgtd [.] iscsi_scsi_cmd_execute + 2.39% tgtd [.] it_nexus_lookup + 2.21% tgtd [.] target_cmd_queue + 2.09% tgtd [.] tgt_event_modify + 1.88% tgtd [.] target_cmd_perform + 1.88% tgtd [.] bs_thread_cmd_submit + 1.85% tgtd [.] is_bs_support_opcode I have tried to use readelf and nm, did not find it. Hope can get some help and suggestion from experts! Thanks for your help. BR Zhu Lingshan