robotics January 2021

robotics@lists.fedoraproject.org

4 participants
3 discussions

Gazebo 11.1 on Fedora 33 and X2Go extreme high CPU; Resource temporarily unavailable in strace
by Robert Kudyba 26 Jan '21

26 Jan '21

I posted this on Fedora's Bugzilla, https://bugzilla.redhat.com/show_bug.cgi?id=1881488 but it was closed. Not sure if X2Go or Gazebo is the problem. Running the following: gazebo-11.1.0-2.fc33.x86_64, 5.9.16-200.fc33.x86_64 From top: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 167977 myuser 20 0 19.6g 325912 148004 S 882.6 0.2 5:33.38 gzclient And from strace, wouldn't all of the "Resource temporarily unavailable" be troublesome? futex(0x557771fbecec, FUTEX_WAIT_PRIVATE, 0, NULL) = 0 futex(0x557771fbec98, FUTEX_WAKE_PRIVATE, 1) = 0 poll([{fd=32, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=32, revents=POLLOUT}]) writev(32, [{iov_base="\201\3\n\0\4\0\200\2\3\0`\2\300\3@\2\0\0\0\0\300\3@\2\0\0\0\0\30\2\0\2"..., iov_len=40}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 40 recvmsg(32, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(32, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=37, events=POLLIN}, {fd=38, events=POLLIN}, {fd=45, events=POLLIN}], 3, 0) = 0 (Timeout) write(37, "\1\0\0\0\0\0\0\0", 8) = 8 write(37, "\1\0\0\0\0\0\0\0", 8) = 8 poll([{fd=37, events=POLLIN}, {fd=38, events=POLLIN}, {fd=45, events=POLLIN}], 3, 0) = 1 ([{fd=37, revents=POLLIN}]) read(37, "\2\0\0\0\0\0\0\0", 16) = 8 futex(0x557771fbecec, FUTEX_WAIT_PRIVATE, 0, NULL) = 0 futex(0x557771fbec98, FUTEX_WAKE_PRIVATE, 1) = 0 poll([{fd=32, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=32, revents=POLLOUT}]) writev(32, [{iov_base="\16\3\2\0\4\0\200\2", iov_len=8}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 8 poll([{fd=32, events=POLLIN}], 1, -1) = 1 ([{fd=32, revents=POLLIN}]) recvmsg(32, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\30=\5\0\0\0\0\236\0\0\0\0\0\0\0\254\3@\2\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32 futex(0x557771fbecec, FUTEX_WAIT_PRIVATE, 0, NULL) = 0 futex(0x557771fbec98, FUTEX_WAKE_PRIVATE, 1) = 0 poll([{fd=32, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=32, revents=POLLOUT}]) writev(32, [{iov_base="\201\3\n\0\4\0\200\2\3\0`\2\300\3@\2\0\0\0\0\300\3@\2\0\0\0\0\30\2\0\2"..., iov_len=40}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 40 recvmsg(32, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(32, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=37, events=POLLIN}, {fd=38, events=POLLIN}, {fd=45, events=POLLIN}], 3, 0) = 0 (Timeout) write(37, "\1\0\0\0\0\0\0\0", 8) = 8 write(37, "\1\0\0\0\0\0\0\0", 8) = 8 poll([{fd=37, events=POLLIN}, {fd=38, events=POLLIN}, {fd=45, events=POLLIN}], 3, 0) = 1 ([{fd=37, revents=POLLIN}]) read(37, "\2\0\0\0\0\0\0\0", 16) = 8 write(37, "\1\0\0\0\0\0\0\0", 8) = 8 futex(0x7f82a1f3f958, FUTEX_WAKE_PRIVATE, 2147483647) = 1

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New Contributor
by Suhaas Joshi 17 Jan '21

17 Jan '21

Hello everyone! My name is Suhaas. I will be applying to Fedora Project under GSOC 2021 and would like to start contributing, hopefully to the robotics SIG, since I am eager to explore robotics a bit. I am proficient in C++ and linear and tree data structures. I also know the basics of Python and supervised Machine Learning, though I am not quite as proficient in them. My timezone is Indian Standard Time(IST). Please let me know if and how I can start contributing :) Thanks Suhaas

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Gazebo 11 problem with protobuf version (3.12.4)
by Eric Masseran 07 Jan '21

07 Jan '21

Hi, I am using gazebo on Fedora 33, I installed the version 11 from https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest/. As I was following this tutorial to make a plugin ( http://gazebosim.org/tutorials?tut=plugins_hello_world&cat=write_plugin) I got a compilation error: ``` | AuxillaryParseTableField Dans le fichier inclus depuis /usr/include/gazebo-11/gazebo/msgs/MessageTypes.hh:135, depuis /usr/include/gazebo-11/gazebo/msgs/msgs.hh:35, depuis /usr/include/gazebo-11/gazebo/gazebo_core.hh:20, depuis /usr/include/gazebo-11/gazebo/gazebo.hh:20, depuis /home/eric/GitGalaxy/robotics/gazebo/plugin_tutorial/hello_world.cc:1: /usr/include/gazebo-11/gazebo/msgs/wrench_stamped.pb.h:58:51: erreur: « AuxiliaryParseTableField » dans l'espace de noms « google::protobuf::internal » ne nomme pas un type; vouliez-vous utiliser « AuxillaryParseTableField » ? 58 | static const ::PROTOBUF_NAMESPACE_ID::internal::AuxiliaryParseTableField aux[] | ^~~~~~~~~~~~~~~~~~~~~~~~ | AuxillaryParseTableField ``` After investigating, it seems that it is a protobuf problem. This commit changed the spelling involved in the error: https://github.com/protocolbuffers/protobuf/commit/2ae7cf0e03c3469973e592e8… The commit is tagged with the version 3.12.3 (the version probably used for the gazebo compilation). However, the tagging was wrong for 3.12.X and should not include this commit. So the team released a 3.12.4 version without this commit and some others. ( https://github.com/protocolbuffers/protobuf/issues/7632#issuecomment-666764… ) Right now Fedora 33 has the protobuf version 3.12.4 in the official repository so it seems incompatible. So, my question is it possible to build the packages again in https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest with the actual protobuf version in F33 repository (3.12.4) ? Regards, Eric

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robotics January 2021