Date: Thu, 22 Nov 2018 05:17:01 +0000 From: bugzilla-noreply@freebsd.org To: threads@FreeBSD.org Subject: [Bug 233396] In FreeBSD 11.x thread creation time is too much on Xeon Gold 5115 CPU Message-ID: <bug-233396-13406@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233396 Bug ID: 233396 Summary: In FreeBSD 11.x thread creation time is too much on Xeon Gold 5115 CPU Product: Base System Version: 11.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: threads Assignee: threads@FreeBSD.org Reporter: steevanxperia@gmail.com Attachment #199443 text/plain mime type: Created attachment 199443 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D199443&action= =3Dedit simple c code Hi=20 I have attached simple program which just creates one thread and computes t= ime taken to create a thread.=20 System Details:=20 dmesg | grep CPU CPU: Intel(R) Xeon(R) Gold 5115 CPU @ 2.40GHz (2400.07-MHz K8-class CPU) FreeBSD/SMP: Multiprocessor System Detected: 40 CPUs System Information Manufacturer: Supermicro Product Name: Super Server Version: 0123456789 Base Board Information Manufacturer: Supermicro Product Name: X11DPH-Tq Version: 1.01 On this system it takes about 6000 to 15000 microseconds ( usec) to create a thread.=20 I also ran Phoronix OS bench test suite and that also shows same issue. Couple of other users have also reported this issue for FreeBSD 11.x=20 Please see these following links and look for "Create Threads" row. https://openbenchmarking.org/result/1804094-AR-1804096AR58 https://openbenchmarking.org/result/1807114-RA-WINDOWSSE47 On the other hand this issue is not found when I run FreeBSD 12.0 Beta3 on this same hardware. It takes about 200 to 300 usec to create one thread.=20 Regards Steevan --=20 You are receiving this mail because: You are the assignee for the bug.=
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