Hi
I have read the highlighted code. But I don't understand some part of code. Like highlighted one 1. struct disk_stats 2. *sdi = st_disk[curr], 3. @@ *sdj; This is built in structure or enumerated or ..... kindly reply me On Tue, May 19, 2009 at 11:23 AM, Yakoob, M. Kazi M. <[email protected]>wrote: > Thanks Saifi .. it really helps .. > > Regards, > Kazi > > > On Tue, May 19, 2009 at 4:31 PM, Saifi Khan <[email protected]>wrote: > >> >> >> On Tue, 19 May 2009, Yakoob, M. Kazi M. wrote: >> >> > replying your first email ... SAR for system activity report. >> > >> > not to your detailed reply in your second email. >> > >> > The result you sent me is my expected result too; but what i think this >> > command give a different output in Ubuntu. >> > >> > I updated the system and still the output is same. >> > >> > now; i need to know how manually can i calculate %util ... >> > >> > Thanks in advance ... >> > >> > Regards, >> > Kazi >> > >> >> On my Gentoo machine, i just extracted the source code of >> sysstat 8.0.4 >> >> Here is an excerpt from the FAQ >> >> Because of a Linux kernel bug, iostat -x may display huge I/O >> response times (svctm) and a bandwidth utilization (%util) of >> 100% for some devices. >> >> Indeed these devices have a value for the field #9 (beginning >> after the device name) in /proc/{partitions,diskstats} which >> is always different from 0, and even negative sometimes. >> >> Yet this field should go to zero, since it gives the >> number of I/Os currently in progress (it is incremented as >> requests are submitted, and decremented as they finish). >> >> To (temporarily) solve the problem, you should reboot your >> system to reset the counters in /proc/{partitions,diskstats}. >> >> working with this macro, >> #define S_VALUE(m,n,p) (((double) ((n) - (m))) / (p) * HZ) >> >> please see the Twincling pastebin for the relevant code, >> i've highlighted it for you at >> http://twincling.pastebin.com/f67d42ace >> >> Hope this helps. >> >> thanks >> Saifi. >> >> > > [Non-text portions of this message have been removed]
