Date: Mon, 24 Dec 2018 07:41:50 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 234325] pmcstat seems to be broken in sampling mode (at least on amd hardware) Message-ID: <bug-234325-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D234325 Bug ID: 234325 Summary: pmcstat seems to be broken in sampling mode (at least on amd hardware) Product: Base System Version: 12.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: misc Assignee: bugs@FreeBSD.org Reporter: shamaz.mazum@gmail.com Hello. I use FreeBSD 12.0-RELEASE on two machines (one with Ryzen 5 1600X processor and the other with FX-6300). Recently (presumable after upgrading to 12.0-RELEASE) pmcstat stopped worki= ng in sample mode. I run it as: `pmcstat -P instructions -O test.out -n 65536 ./noisecpu` on FX-6300 or `pmcstat -P ex_ret_instr -O test.out -n 65536 ./noisecpu` on Ryzen and then I run `pmcstat -R test.out -g` In both cases it creates directories (e.g. ex_ret_instr) which are either e= mpty or containing only kernel.gmon `noisecpu` is computation heavy program, calculating value noise on a large grid and works for ~8 seconds. Conversion statistics usually looks like following: #exec/elf 1 #samples/total 169 #samples/unclaimed 165 #callchain/dubious-frames 165 In counting mode (with -p argument) everything seems to be working. Can any= body confirm this? --=20 You are receiving this mail because: You are the assignee for the bug.=
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