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* useradd_base.bbclass: avoid the traffic crowdingRobert Yang2014-04-051-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, it would sleep 1 second when fail to add the user, this maybe not enough when we use the sstate cache, as my test shows below, nearly all the useradd actions are doing in the same minute when mirror from ssate cache, and it would fail when the load is high, I got these time by adding strace before the useradd for debugging: 2014-03-31 14:48:22.978079781 +0800 /tmp/log/pulseaudio.4.c 2014-03-31 14:48:22.028079813 +0800 /tmp/log/pulseaudio.1.c 2014-03-31 14:48:21.949079816 +0800 /tmp/log/pulseaudio.3.c 2014-03-31 14:48:20.903079852 +0800 /tmp/log/pulseaudio.2.c 2014-03-31 14:48:20.006079883 +0800 /tmp/log/nfs-utils.9.c 2014-03-31 14:48:18.876079923 +0800 /tmp/log/xuser-account.9.c 2014-03-31 14:48:18.824079924 +0800 /tmp/log/pulseaudio.0.c 2014-03-31 14:48:17.826079959 +0800 /tmp/log/xuser-account.8.c 2014-03-31 14:48:17.766079961 +0800 /tmp/log/nfs-utils.8.c 2014-03-31 14:48:16.794079995 +0800 /tmp/log/xuser-account.7.c 2014-03-31 14:48:16.735079997 +0800 /tmp/log/nfs-utils.7.c 2014-03-31 14:48:14.719080066 +0800 /tmp/log/xuser-account.5.c 2014-03-31 14:48:14.677080068 +0800 /tmp/log/nfs-utils.5.c 2014-03-31 14:48:12.621080139 +0800 /tmp/log/nfs-utils.3.c 2014-03-31 14:48:11.589080175 +0800 /tmp/log/nfs-utils.2.c 2014-03-31 14:48:10.242080221 +0800 /tmp/log/builder.0.c 2014-03-31 14:48:09.523080246 +0800 /tmp/log/nfs-utils.0.c 2014-03-31 14:48:09.488080248 +0800 /tmp/log/openssh.0.c 2014-03-31 14:48:09.485080248 +0800 /tmp/log/rpcbind.1.c 2014-03-31 14:48:07.590080313 +0800 /tmp/log/rpcbind.0.c 2014-03-31 14:28:15.437121590 +0800 /tmp/log/avahi.0.c 2014-03-31 14:18:19.067142238 +0800 /tmp/log/dbus.0.c The nfs-utils and xuser-account are failed to add the user. The useradd command needs two locks, passwd.lock and group.lock, it may get one, but can't get another one if we look into these .c files, sleep 1 second is not enough, it needs more seconds, the reason is that, if succeed, it doesn't have any side effects, if failed, we need wait for more seconds rather than make it more crowding. I've tried to use "sleep 5", but it didn't make much better since they would sleep and wake up nearly at the same time, I also tried to use "sleep <RANDOM seconds between 1 and 10>", that didn't make much better ,either. I think that a better ways is sleep more and more seconds (up to 10 seconds) when failed, this can't fix the problem that they may do the actions at the same time, but the logic is: if it is not crowding, sleep less time should be OK, otherwise sleep more and more time. Here is the testing result which seems much better: 2014-04-03 14:09:56.605185284 +0800 dbus.0.c 2014-04-03 14:09:39.899185862 +0800 rpcbind.5.c 2014-04-03 14:09:38.400185914 +0800 distcc.4.c 2014-04-03 14:09:35.206186025 +0800 pulseaudio.1.c 2014-04-03 14:09:33.979186067 +0800 rpcbind.4.c 2014-04-03 14:09:33.364186089 +0800 pulseaudio.0.c 2014-04-03 14:09:33.360186089 +0800 distcc.3.c 2014-04-03 14:09:30.996186171 +0800 avahi-ui.0.c 2014-04-03 14:09:30.298186195 +0800 distcc.2.c 2014-04-03 14:09:29.905186208 +0800 rpcbind.3.c 2014-04-03 14:09:29.410186226 +0800 avahi-ui.2.c 2014-04-03 14:09:28.239186266 +0800 distcc.1.c 2014-04-03 14:09:27.298186299 +0800 xuser-account.0.c 2014-04-03 14:09:27.032186308 +0800 distcc.0.c 2014-04-03 14:09:26.836186315 +0800 rpcbind.2.c 2014-04-03 14:09:25.846186349 +0800 nfs-utils.1.c 2014-04-03 14:09:25.752186352 +0800 avahi-ui.1.c 2014-04-03 14:09:24.779186386 +0800 builder.0.c 2014-04-03 14:09:24.746186387 +0800 rpcbind.1.c 2014-04-03 14:09:23.916186416 +0800 openssh.1.c 2014-04-03 14:09:23.848186418 +0800 nfs-utils.0.c 2014-04-03 14:09:23.594186427 +0800 rpcbind.0.c 2014-04-03 14:09:22.609186461 +0800 ppp-dialin.0.c 2014-04-03 14:09:21.817186488 +0800 openssh.0.c [YOCTO #6085] (From OE-Core rev: 9cedc786ba132935748bdca8bc33b56c366b531e) Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
* useradd.bbclass: add a new base class and code refactorChen Qi2013-07-241-0/+230
Add a new base class, useradd_base.bbclass, which is mainly a collection of basic functions for user/group settings. The useradd_base.bbclass is intended to be inherited by useradd.bbclass and the extrausers.bbclass to avoid code cuplication. [YOCTO #4074] (From OE-Core rev: 2a57bb7e9a7e154578aa7cb9aeebdf398a54ec00) Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>