On Mon, Dec 08, 2014 at 01:09:22PM +0100, Cyril Hrubis wrote: > Hi! > > I cannot understand why udelta/sdelta > "1000+(BIAS_MAX*factor_nr)" is a > > problem. Could any expert give me a explain, please? > > It tests timer precision for getrusage timers. If the timers are > incremting by larger values than expected, something is wrong in kernel. > The precision depends on CONFIG_HZ settings which is represented by the > BIAS_MAX. Where does the 1000 come from? If on a slow system, we need to increase the "factor_nr", right? > > > And looks like with this patch applied, it works well on powerpc: > > Can you please share the output of the testcase on ppc and ppc64? What > is the expected timer granularity there? > Looks like the granularity is 10000us:
getrusage04 0 TINFO : Expected timers granularity is 10000 us getrusage04 0 TINFO : Using 1 as multiply factor for max [us]time increment (1000+10000us)! getrusage04 0 TINFO : utime: 56us; stime: 1192us getrusage04 0 TINFO : utime: 56us; stime: 2009us getrusage04 0 TINFO : utime: 56us; stime: 4233us getrusage04 0 TINFO : utime: 1227us; stime: 5243us getrusage04 0 TINFO : utime: 1227us; stime: 8541us getrusage04 0 TINFO : utime: 2072us; stime: 8741us getrusage04 0 TINFO : utime: 2602us; stime: 11169us getrusage04 0 TINFO : utime: 2743us; stime: 11747us getrusage04 0 TINFO : utime: 2948us; stime: 12790us getrusage04 0 TINFO : utime: 2948us; stime: 18118us getrusage04 0 TINFO : utime: 2948us; stime: 18596us getrusage04 0 TINFO : utime: 4458us; stime: 20030us getrusage04 0 TINFO : utime: 4458us; stime: 20244us getrusage04 0 TINFO : utime: 4458us; stime: 23432us getrusage04 0 TINFO : utime: 5412us; stime: 24650us getrusage04 0 TINFO : utime: 5412us; stime: 27273us getrusage04 0 TINFO : utime: 6125us; stime: 27909us getrusage04 0 TINFO : utime: 6125us; stime: 27911us getrusage04 0 TINFO : utime: 6125us; stime: 28111us getrusage04 0 TINFO : utime: 6235us; stime: 28513us getrusage04 0 TINFO : utime: 6235us; stime: 28750us getrusage04 1 TPASS : Test Passed ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list
