Date: Wed, 22 Mar 2023 16:57:08 -0600 From: Warner Losh <imp@bsdimp.com> To: George Mitchell <george+freebsd@m5p.com> Cc: Mark Millard <marklmi@yahoo.com>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Periodic rant about SCHED_ULE Message-ID: <CANCZdfq2Sgzh-JMRHjexpvUnNTztQjXbmdJr906JhQRqm2rGWw@mail.gmail.com> In-Reply-To: <952d9795-19dc-8ad1-bb75-5c556ca6795a@m5p.com> References: <6BD317F2-7EDD-45C0-9DC9-5B94C1BBB8E1.ref@yahoo.com> <6BD317F2-7EDD-45C0-9DC9-5B94C1BBB8E1@yahoo.com> <952d9795-19dc-8ad1-bb75-5c556ca6795a@m5p.com>
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[-- Attachment #1 --] On Wed, Mar 22, 2023 at 1:41 PM George Mitchell <george+freebsd@m5p.com> wrote: > service dnetc start > I am literally running "make buildworld" with no additional options. > > So what are the results for make buildworld -j $(sysctl -n hw.ncpu )? ULE scales much better, but when there's too little to do it can make poor choices. ULE is better locked and don't fall over on high core count systems like BSD does at moderate load. Warner [-- Attachment #2 --] <div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 22, 2023 at 1:41 PM George Mitchell <<a href="mailto:george%2Bfreebsd@m5p.com">george+freebsd@m5p.com</a>> wrote:</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> service dnetc start<br>I am literally running "make buildworld" with no additional options.<br><br></blockquote><div><br></div><div>So what are the results for make buildworld -j $(sysctl -n hw.ncpu )?</div><div><br></div><div>ULE scales much better, but when there's too little to do it can make poor choices.</div><div><br></div><div>ULE is better locked and don't fall over on high core count systems like BSD does at moderate load.</div><div><br></div><div>Warner</div></div></div>
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