I'd imagine the builders of Arch Linux on Termux would want to know why OpenMPI is not functioning as expected.
On Thu, 25 Feb 2021, 20:17 Jeff Squyres (jsquyres), <jsquy...@cisco.com> wrote: > I don't know how many people on this list will be familiar with Termux or > Arch Linux. From a quick Google, it looks like Termux is an Android > emulator (that runs on Android? That doesn't make sense to me, but I'm > wholly unfamiliar with that ecosystem, so I don't have the background / > grok the context) and provides some kind of Linux environment. And on top > of that, you're installing Arch Linux. Is that correct? > > If that's anywhere close to correct, it sounds like there could be > multiple layers of virtualization there, and that could lead to wonkiness > in the emulation of the IP stack. > > I do note that the only interface it looks like Open MPI could use is > rmnet_data0, but that's in an UNKNOWN state: > > 5: rmnet_data0: <UP,LOWER_UP> mtu 1500 qdisc htb state UNKNOWN group > default qlen 1000 > link/[530] > inet 10.140.58.138/30 scope global rmnet_data0 > valid_lft forever preferred_lft forever > inet6 fe80::93a5:ad99:4660:adc4/64 scope link > valid_lft forever preferred_lft forever > > Errno==13 is EACCESS, which generically translates to "permission > denied". Since you're running as root, this suggests that something > outside of your local environment (e.g., outside of that immediate layer of > virtualization) is preventing Open MPI from making that > ioctl(SIOCGIFHWADDR) call (all that call is trying to do is discover the > MAC address of that interface). > > Indeed, it looks like rmnet_data0 somehow doesn't have a MAC address...? > > rmnet_data0: flags=65<UP,RUNNING> mtu 1500 > inet 10.140.58.138 netmask 255.255.255.252 > inet6 fe80::93a5:ad99:4660:adc4 prefixlen 64 scopeid 0x20<link> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen > 1000 (UNSPEC) > RX packets 416796 bytes 376287723 (358.8 MiB) > RX errors 0 dropped 0 overruns 0 frame 0 > TX packets 318293 bytes 69933666 (66.6 MiB) > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 > > That's... weird. I don't know the details of this network stack; it's > somewhat outside the bounds of "normal" IP-based networking if there's no > MAC address. As such, it doesn't surprise me that -- given that one of > Open MPI's core assumptions fails -- Open MPI fails / refuses to run. > > I don't know if anyone has tried to run Open MPI in such a virtualized > environment before. > > > > > On Feb 25, 2021, at 6:04 AM, LINUS FERNANDES via users < > users@lists.open-mpi.org> wrote: > > So the OpenMPI version on Arch Linux can't be made operational? > > On Thu, 25 Feb 2021, 15:43 LINUS FERNANDES, <linus.fernan...@gmail.com> > wrote: > >> Nope. None of the commands exist. So no, I'd say. >> >> On Thu, 25 Feb 2021, 15:11 Gilles Gouaillardet via users, < >> users@lists.open-mpi.org> wrote: >> >>> https://www.letmegooglethat.com/?q=how+to+check+if+selinux+is+enabled&l=1 >>> >>> On Thu, Feb 25, 2021 at 6:15 PM LINUS FERNANDES via users >>> <users@lists.open-mpi.org> wrote: >>> > >>> > How do I know that? I'm not a Linux expert. I simply want to get >>> OpenMPI running on Arch Linux so that I can test out their Java wrappers >>> which I obviously can't on Termux since it doesn't support OpenJDK. >>> > >>> > On Thu, 25 Feb 2021, 13:37 Gilles Gouaillardet via users, < >>> users@lists.open-mpi.org> wrote: >>> >> >>> >> Is SELinux running on ArchLinux under Termux? >>> >> >>> >> On 2/25/2021 4:36 PM, LINUS FERNANDES via users wrote: >>> >> > Yes, I did not receive this in my inbox since I set to receive >>> digest. >>> >> > >>> >> > -------- >>> >> > ifconfig output: >>> >> > >>> >> > dummy0: flags=195<UP,BROADCAST,RUNNING,NOARP> mtu 1500 >>> >> > inet6 fe80::38a0:1bff:fe81:d4f5 prefixlen 64 scopeid >>> 0x20<link> >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 0 (UNSPEC) >>> >> > RX packets 0 bytes 0 (0.0 B) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 3 bytes 210 (210.0 B) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 >>> >> > inet 127.0.0.1 netmask 255.0.0.0 >>> >> > inet6 ::1 prefixlen 128 scopeid 0x10<host> >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 0 (UNSPEC) >>> >> > RX packets 17247 bytes 2062939 (1.9 MiB) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 17247 bytes 2062939 (1.9 MiB) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > p2p0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 1000 (UNSPEC) >>> >> > RX packets 0 bytes 0 (0.0 B) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 0 bytes 0 (0.0 B) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > rmnet_data0: flags=65<UP,RUNNING> mtu 1500 >>> >> > inet 10.140.58.138 netmask 255.255.255.252 >>> >> > inet6 fe80::93a5:ad99:4660:adc4 prefixlen 64 scopeid >>> 0x20<link> >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 1000 (UNSPEC) >>> >> > RX packets 416796 bytes 376287723 (358.8 MiB) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 318293 bytes 69933666 (66.6 MiB) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > rmnet_data7: flags=65<UP,RUNNING> mtu 2000 >>> >> > inet6 fe80::a6b7:c914:44de:639 prefixlen 64 scopeid >>> 0x20<link> >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 1000 (UNSPEC) >>> >> > RX packets 8 bytes 620 (620.0 B) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 10 bytes 752 (752.0 B) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > rmnet_ipa0: flags=65<UP,RUNNING> mtu 2000 >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 1000 (UNSPEC) >>> >> > RX packets 222785 bytes 381290027 (363.6 MiB) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 318303 bytes 69934418 (66.6 MiB) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 >>> >> > unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 >>> >> > txqueuelen 1000 (UNSPEC) >>> >> > RX packets 650238 bytes 739939859 (705.6 MiB) >>> >> > RX errors 0 dropped 0 overruns 0 frame 0 >>> >> > TX packets 408284 bytes 63728624 (60.7 MiB) >>> >> > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>> >> > >>> >> > >>> >> > ----- >>> >> > ip addr output: >>> >> > >>> >> > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN >>> >> > group default >>> >> > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 >>> >> > inet 127.0.0.1/8 <http://127.0.0.1/8> scope host lo >>> >> > valid_lft forever preferred_lft forever >>> >> > inet6 ::1/128 scope host >>> >> > valid_lft forever preferred_lft forever >>> >> > 2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue >>> state >>> >> > UNKNOWN group default >>> >> > link/ether 3a:a0:1b:81:d4:f5 brd ff:ff:ff:ff:ff:ff >>> >> > inet6 fe80::38a0:1bff:fe81:d4f5/64 scope link >>> >> > valid_lft forever preferred_lft forever >>> >> > 3: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default >>> >> > link/sit 0.0.0.0 brd 0.0.0.0 >>> >> > 4: rmnet_ipa0: <UP,LOWER_UP> mtu 2000 qdisc pfifo_fast state UNKNOWN >>> >> > group default qlen 1000 >>> >> > link/[530] >>> >> > 5: rmnet_data0: <UP,LOWER_UP> mtu 1500 qdisc htb state UNKNOWN group >>> >> > default qlen 1000 >>> >> > link/[530] >>> >> > inet 10.140.58.138/30 <http://10.140.58.138/30> scope global >>> >> > rmnet_data0 >>> >> > valid_lft forever preferred_lft forever >>> >> > inet6 fe80::93a5:ad99:4660:adc4/64 scope link >>> >> > valid_lft forever preferred_lft forever >>> >> > 6: rmnet_data1: <> mtu 1500 qdisc noop state DOWN group default >>> qlen 1000 >>> >> > link/[530] >>> >> > 7: rmnet_data2: <> mtu 1500 qdisc noop state DOWN group default >>> qlen 1000 >>> >> > link/[530] >>> >> > 8: rmnet_data3: <> mtu 1500 qdisc noop state DOWN group default >>> qlen 1000 >>> >> > link/[530] >>> >> > 9: rmnet_data4: <> mtu 1500 qdisc noop state DOWN group default >>> qlen 1000 >>> >> > link/[530] >>> >> > 10: rmnet_data5: <> mtu 1500 qdisc noop state DOWN group default >>> qlen 1000 >>> >> > link/[530] >>> >> > 11: rmnet_data6: <> mtu 1500 qdisc noop state DOWN group default >>> qlen 1000 >>> >> > link/[530] >>> >> > 12: rmnet_data7: <UP,LOWER_UP> mtu 2000 qdisc htb state UNKNOWN >>> group >>> >> > default qlen 1000 >>> >> > link/[530] >>> >> > inet6 fe80::a6b7:c914:44de:639/64 scope link >>> >> > valid_lft forever preferred_lft forever >>> >> > 13: r_rmnet_data0: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 14: r_rmnet_data1: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 15: r_rmnet_data2: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 16: r_rmnet_data3: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 17: r_rmnet_data4: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 18: r_rmnet_data5: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 19: r_rmnet_data6: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 20: r_rmnet_data7: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 21: r_rmnet_data8: <> mtu 1500 qdisc noop state DOWN group default >>> >> > qlen 1000 >>> >> > link/[530] >>> >> > 22: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq >>> state >>> >> > DOWN group default qlen 1000 >>> >> > link/ether 04:d1:3a:07:70:4b brd ff:ff:ff:ff:ff:ff >>> >> > 23: p2p0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq >>> state >>> >> > DOWN group default qlen 1000 >>> >> > link/ether 06:d1:3a:07:70:4b brd ff:ff:ff:ff:ff:ff >>> >> > >>> >> > >>> >> > This is on Arch Linux on Termux. >>> >> > >>> >> > Similar output on Termux available. >>> >> > >>> >> > >>> >> > > -- > Jeff Squyres > jsquy...@cisco.com > >
