Date: Fri, 23 Feb 2024 10:55:51 -0700 From: Warner Losh <imp@bsdimp.com> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: really slow problem with nvme Message-ID: <CANCZdfoBc7bW6so8H4=dD-XogPp0uQKr1pZjRvSH5%2B8HEGMTCg@mail.gmail.com> In-Reply-To: <5n117579-8259-3on3-90pn-79o8n52q4q32@yvfgf.mnoonqbm.arg> References: <5n117579-8259-3on3-90pn-79o8n52q4q32@yvfgf.mnoonqbm.arg>
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[-- Attachment #1 --] On Fri, Feb 23, 2024, 10:46 AM Bjoern A. Zeeb < bzeeb-lists@lists.zabbadoz.net> wrote: > Hi, > > this is a Samsung SSD 970 EVO Plus 1TB nvme and gpart and newfs > were already slow (it took like two hours for newfs). > > Here's another example now: > > # /usr/bin/time mkdir foo > 1.82 real 0.00 user 0.00 sys > > How does one debug this? > What filesystem? Sounds like UFS but just making sure. . So what's the link speed and number of lanes? If it's bad i might reseat (though that might not help) that looks good... Though I'd bet money that this is an interrupt issue. I'd do a vmstat. -i to watch how quickly they accumulate... How old is the drive? Fresh install? Do other drives have this same issue in the same slot? Dies this drive have issues in other maxhines or slots? Warner -- > Bjoern A. Zeeb r15:7 > > [-- Attachment #2 --] <div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Feb 23, 2024, 10:46 AM Bjoern A. Zeeb <<a href="mailto:bzeeb-lists@lists.zabbadoz.net">bzeeb-lists@lists.zabbadoz.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br> <br> this is a Samsung SSD 970 EVO Plus 1TB nvme and gpart and newfs<br> were already slow (it took like two hours for newfs).<br> <br> Here's another example now:<br> <br> # /usr/bin/time mkdir foo<br> 1.82 real 0.00 user 0.00 sys<br> <br> How does one debug this?<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">What filesystem? Sounds like UFS but just making sure. .</div><div dir="auto"><br></div><div dir="auto">So what's the link speed and number of lanes? If it's bad i might reseat (though that might not help) that looks good...</div><div dir="auto"><br></div><div dir="auto">Though I'd bet money that this is an interrupt issue. I'd do a vmstat. -i to watch how quickly they accumulate...</div><div dir="auto"><br></div><div dir="auto">How old is the drive? Fresh install? Do other drives have this same issue in the same slot? Dies this drive have issues in other maxhines or slots?</div><div dir="auto"><br></div><div dir="auto">Warner</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> -- <br> Bjoern A. Zeeb r15:7<br> <br> </blockquote></div></div></div>
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