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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
Date: Thu, 22 Nov 2018 05:17:01 +0000
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X-Bugzilla-Component: threads
X-Bugzilla-Version: 11.2-STABLE
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X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: steevanxperia@gmail.com
X-Bugzilla-Status: New
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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.=