Date: Fri, 08 Aug 2014 13:05:11 -0400 From: Allan Jude <allanjude@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: disk and NIC io statistics via sysctl Message-ID: <53E50347.9050206@freebsd.org> In-Reply-To: <1407515358.56408.374.camel@revolution.hippie.lan> References: <20140808184021.537feca9b15e3a261ea27fa7@systemdatarecorder.org> <1407515358.56408.374.camel@revolution.hippie.lan>
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[-- Attachment #1 --] On 2014-08-08 12:29, Ian Lepore wrote: > On Fri, 2014-08-08 at 18:40 +0300, Stefan Parvu wrote: >> Hi, >> >> Fetching CPU and Memory statistics, using sysctl interface and perl seems nice and easy. >> I made great progress with sysrec a generic recorder reporting: cpu mem disk and nic >> stats on FreeBSD. Now Im getting into disk and nic sections: >> >> 1. Disk >> Im able to get a list of all disks on a system using kern.disks sysctl variable. >> I want to be able to report per disk something like: >> >> readreq rate read requests per second, rate >> writereq rate write requests per second, rate >> totreq rate total read + write requests per second, rate >> readbyt rate read bytes per second, in KB, rate >> writebyt rate write bytes per second, in KB, rate >> totbyt rate total read + write bytes per second, in KB, rate >> >> iostat seems the simplest way to fetch these, but how about sysctl interface ? >> I could not figure out any sysctl parameters for disk throughput. How one will >> fetch throughput per disk via sysctl ? >> >> >> 2. NIC >> Same will go for network card interfaces. I want to fetch per NIC throughput and >> errors via sysctl, something like these: >> >> 1 timestamp time seconds since Epoch >> 2 interface number NIC name, string >> 3 rxKB rate the number of KBytes received per sec >> 4 rxpcks rate the no. of packets received per sec >> 5 rxerrs rate the number of errors while received packets per sec >> 6 rxdrop rate the number of packets that were dropped per sec >> 7 rxfifo rate the number of FIFO overruns on received packets per sec >> 8 rxframe rate the number of carrier errors on received packet per sec >> 9 rxcompr rate the number of compressed packets received per sec >> 10 rxmulti rate the number of multicast packets received per sec >> 11 txKB rate the number of KBytes transmitted per sec >> 12 txpcks rate the number of packets transmitted per sec >> 13 txerrs rate the number of errors transmitting packets per sec >> 14 txdrop rate the number of packets that were dropped per sec >> 15 txfifo rate the number of FIFO overruns on transmitted packets per sec >> 16 txcolls rate the number of collisions that were detecte per sec >> 17 txcarr rate the number of carrier errors on transmitted packets per sec >> 18 txcompr rate the number of compressed packets transmitted per sec >> 19 ttpcks rate the total number of packets (received + transmitted) per sec >> 20 ttKB rate the total number of KBytes (received + transmitted) per sec >> >> >> Any ideas ? >> >> Many thanks, >> > > All of this series of questions you've been asking really have the same > answer: look at the source code for the very apps you cite as examples > of outputting the info you want, and do what they do. There are no > magic secret kernel backdoor interfaces, all these userland tools are > using documented interfaces such as sysctl to get their info. (There > may be a few miscreants that open /dev/kmem and rudely poke around in > kernel memory, but I'm not sure we have any of them in base. The lsof > tool in ports is one that comes to mind for that.) > > In addition to the tools you've already mentioned that have the info you > want, have a look at gstat for IO stats, netstat for net throughput, and > systat for lots of stuff. > > -- Ian > > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > I often use net/nload from ports to monitor interfaces, it may be helpful as well. -- Allan Jude [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJT5QNJAAoJEJrBFpNRJZKfoo4P/09cqFl8U5tU6Ua1ccjvA8Gp ADD7NiLbRR8gq5xhHWTPNYY5LGsaT34PWXqlArxq4Hx/DCDsor15kY1UnVGyFh1+ IR4sCHHoZOYmdx9SS7zqJKBTp/6nYYS5a8DpPXIm2JS3IFnIcPrmZWviRWUCglNj XrrKlApqrBNOq8oZTBt1Oyum8WTdblfsLVS84ucJy31jk/gPIPX0xJS7VecuNWkz c484Kk/cLWyzz9Cb1Mq2ikWAs1nFCC8DSWdEu0OiowRlKLreDVZJC9j8qlpUMcsl zeUvBw7TRsHqi9gLOLhv0YHnLeeFe1wvVwbTFhKgdssvu/YpZDOlBDvJBz75MVJR 2wdXRhF3Uqf/cd3nXCXrIKedwj4nIDBOxNo60UK/M3fW6QooYo14vDwzQgjryZIP NyQFHIjixuHSZOY/1eOhqkVMBhnaLZFDCfxDp6ES9MVSHg34Mkh7j9CB3yzF148K Bjuzon3N/XfMH3It4kaqKiJL6k7P+XksDrcDcfHT6yIVEq1u3+HnG5tNB+ktmK7g SUtDcXTIb4aAevDYuVVXsRgt4tWclrvmTWuDM7buBb7oAhOmmEgo8g52b8R3Dt9w UCbqDjQRe4r3K4iY7dMz68LtLjBkykq0Ad7SMa2BuPgjGUWJlcV3C5IaEr4DmEKr lzfi23p1WsIZduBHs04P =xuDu -----END PGP SIGNATURE-----
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