Messages in this thread | | | Date | Mon, 7 Jul 2014 12:14:30 -0700 | From | Guenter Roeck <> | Subject | Re: 3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU |
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On Mon, Jul 07, 2014 at 08:21:38PM +0200, Manuel Reimer wrote: > Hello, > > maybe someone can help me to find the reason for this problem: > > If I run my iMX233 development board with an 3.15.3 kernel, then the > performance is much better as with an 3.15.4 kernel. > > I have the first significant "hanging" here: > > [ 7.910000] sd 0:0:0:0: [sda] Attached SCSI removable disk > [ 10.810000] random: nonblocking pool is initialized > [ 24.310000] systemd[1]: systemd 214 running in system mode. (+PAM > -AUDIT -SELINUX -IMA -SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ > +SECCOMP -APPARMOR) > > After booting up it takes several seconds between entering the > username and the password while with version 3.15.3 the password > prompt appears almost immediately after entering the username. >
Are you sure this did not just happen when you booted the new kernel for the first time ? I have seen similar behavior with some distributions.
If it happens all the time, ie at subsequent boots as wel, you'll probably have to bisect the problem. I have not seen an obvious culprit.
Guenter
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