Hi, On Thu, Oct 18, 2007 at 11:36:18AM -0400, Luis Claudio R. Goncalves wrote: > Ankita, > > On Thu, Oct 18, 2007 at 06:56:14PM +0530, Ankita Garg wrote: > | Hi David, > | > | On Thu, Oct 18, 2007 at 05:52:42AM -0700, David Miller wrote: > | > From: ankita@xxxxxxxxxx (Ankita Garg) > | > Date: Thu, 18 Oct 2007 18:18:27 +0530 > | > > | > > Any thoughts on where in the code could these large latencies be > | > > attributed to? > | > > | > If the max latency is usually the first one, it's could be the page > | > fault the signal handler is taking the first time it is executed. > | > | Thanks for looking into this. Attaching the entire log from the testrun. > | It indicates that in each run of the 10000 iterations, there are about 100+ > | failures, with large iterations. Also, on intrumenting the testcode to > | find out the iterations which see large latencies, I see that as the > | number of iterations increase, the latencies increase. > > You might wanna check signaltest: > > git clone git://git.kernel.org/pub/scm/linux/kernel/git/tglx/rt-tests.git rt-tests > Are any previous logs available for signaltest? This is what I get on 2.6.23-rt1- # ./signaltest -q -p 85 -l100000 -t8 T: 0 ( 6791) P:85 C: 100000 Min: 109 Act: 148 Avg: 143 Max: 252 T: 1 ( 6792) P:85 C: 100000 Min: 109 Act: 148 Avg: 769 Max: 10240 T: 2 ( 6793) P:85 C: 100000 Min: 109 Act: 148 Avg: 769 Max: 10247 T: 3 ( 6794) P:85 C: 100000 Min: 109 Act: 161 Avg: 769 Max: 10238 T: 4 ( 6795) P:85 C: 100000 Min: 109 Act: 183 Avg: 769 Max: 10238 T: 5 ( 6796) P:85 C: 100000 Min: 109 Act: 214 Avg: 769 Max: 10239 T: 6 ( 6797) P:85 C: 100000 Min: 109 Act: 236 Avg: 769 Max: 10237 T: 7 ( 6798) P:85 C: 100000 Min: 109 Act: 329 Avg: 769 Max: 10238 And this on 2.6.21.4-rt10- # ./signaltest -q -p 85 -l100000 -t8 T: 0 ( 3767) P:85 C: 100000 Min: 56 Act: 101 Avg: 99 Max: 162 T: 1 ( 3768) P:85 C: 100000 Min: 56 Act: 101 Avg: 725 Max: 10164 T: 2 ( 3769) P:85 C: 100000 Min: 56 Act: 101 Avg: 725 Max: 10164 T: 3 ( 3770) P:85 C: 100000 Min: 56 Act: 102 Avg: 725 Max: 10164 T: 4 ( 3771) P:85 C: 100000 Min: 56 Act: 111 Avg: 725 Max: 10165 T: 5 ( 3772) P:85 C: 100000 Min: 56 Act: 120 Avg: 725 Max: 10163 T: 6 ( 3773) P:85 C: 100000 Min: 56 Act: 135 Avg: 725 Max: 10164 T: 7 ( 3774) P:85 C: 100000 Min: 56 Act: 178 Avg: 725 Max: 10165 The values seem rather high! > Regards, > Luis > -- > [ Luis Claudio R. Goncalves Bass - Gospel - RT ] > [ Fingerprint: 4FDD B8C4 3C59 34BD 8BE9 2696 7203 D980 A448 C8F8 ] > > - > To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Regards, Ankita Garg (ankita@xxxxxxxxxx) Linux Technology Center IBM India Systems & Technology Labs, Bangalore, India - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
