users July 2016

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30 participants
35 discussions

Heeselicht scenario
by Stefan Kalkowski 11 Oct '16

11 Oct '16

Hello Genode folks, hereby, I'd like to announce my recent activity to turn the Turmvilla scenario published by Norman after last year's Hack'n'Hike into an USB live setup. Instead of the original variation, this scenario enables you to boot Genode natively from an USB stick on top of your favorite Intel x86 hardware. In parallel, you can execute your previous installed OS on disk inside a VirtualBox VM without further modifications. This setup offered me the opportunity to switch to Genode without the need to alter my current Linux working environment. Thinking that I'm not the only one that might be interested in such a setup, I've spent some time during our recent Hack'n'Hike in a nice old house in "Heeselicht" to facilitate the steps to reproduce this setup. If you are undaunted, and like to give it a try, you can have a look at the corresponding issue: https://github.com/genodelabs/genode/issues/2018 There are detailed instructions in the issue. For further assistance, leave a comment at the issue tracker or reply to this email. Regards Stefan -- Stefan Kalkowski Genode Labs http://www.genode-labs.com/ · http://genode.org/

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booting the SABRE tablet from SD card
by Rijurekha Sen 13 Sep '16

13 Sep '16

Hi, I compiled the demo according to https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/i…. Next to run the demo in the SABRE tablet, I followed the instruction in http://genode-main.narkive.com/qJXUD6w5/arm-trustzone-demo-in-i-mx53-sabre-…. Created the u-boot.imx using https://eewiki.net/display/linuxonarm/i.MX53+Quick+Start#i.MX53QuickStart-B… for the step 2) 2) sudo dd if=$(U-BOOT-DIR)/u-boot.imx of=/dev/sdb seek=2 bs=512 conv=fsync But when I put in the MMC card in the tablet with the SD card in it and restart the tablet, it just powers on to the default Android which it came with. How to get the u-boot prompt, as mentioned in step 4)? 4) After power up the tablet, U-BOOT prompt (u-boot from MMC is not used), I did as follows: MX53-SMD U-Boot > ext2load mmc 0:1 0x70800000 image.bin How to get this u-boot prompt? https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi… has a chapter 3 on various boot options. http://cache.freescale.com/files/32bit/doc/user_guide/IMX53SMDHUG.pdf shows the location of the switches sw26 and sw28 at the back of the board. Does that mean, I should open the back cover of the tablet to change these? Is this what http://genode-main.narkive.com/qJXUD6w5/arm-trustzone-demo-in-i-mx53-sabre-… did? Want to verify the correct thing to do as the tablet is expensive. Thanks! Riju

3 8

porting python in tz_vmm demo
by Abhay Amala 12 Aug '16

12 Aug '16

Hi, I have been trying to port python2.6 into Genode in tz_vmm demo. I did the following steps. - In the Genode source directory <source directory>/repo/libports make prepare PKG=python - Uncomment the following line in <build directory>/etc/build.conf REPOSITORIES += $(GENODE_DIR)/libports - Add '*python.lib.so <http://python.lib.so>*' to the boot module list in the tz_vmm run script. - Add '*python*' in the target file of the tz_vmm as follows LIBS += python Finally, I got the following error when I compiled the tz_vmm run script. Program core/core COMPILE kernel/test.o LINK core make[1]: Leaving directory `/home/genode/build/hw_imx53_qsb_tz' genode build completed cp: cannot stat ‘bin/tz_vmm’: No such file or directory while executing "exec cp bin/$binary [run_dir]/genode" (procedure "copy_and_strip_genode_binaries_to_run_dir" line 4) invoked from within "copy_and_strip_genode_binaries_to_run_dir $binaries" (procedure "run_boot_dir" line 14) invoked from within "run_boot_dir $binaries" (procedure "build_boot_image" line 2) invoked from within "build_boot_image [join $boot_modules " "]" (file "/home/genode/repos/os/run/tz_vmm.run" line 262) invoked from within "source $include_name" ("foreach" body line 6) invoked from within "foreach include_name [get_cmd_arg --include ""] { # first check if the include name is absolute if {[string first "/" $include_name] == 0} { puts ..." (file "/home/genode/tool/run/run" line 642) make: *** [run/tz_vmm] Error 1 Could anyone have an idea how to fix this error? Thanks, Abhay

5 7

Checkpointing dataspaces in core
by Denis Huber 03 Aug '16

03 Aug '16

Dear Genode community, I want to implement a new service (class Cr_session) residing in core which provides an Rpc method to checkpoint the state of a specific component (given its label string). I am using Genode 16.05 and the foc kernel (pbxa9 build). The first step is to store the content of the address space of the compoent. My approach is the following: 1) First a test component is created which shall be checkpointed. The component counts an integer every second. In base/src/test/cr_service/counter/main.cc (newly created file): !void Component::construct(Genode::Env &env) !{ ! unsigned int n = 0; ! Timer::Connection timer(env); ! ! while(1) ! { ! Genode::log(n); ! n++; ! timer.msleep(1000); ! } !} 2) To realize the CR service in core, I want to find the specific PD session of the test component. Therefore a separate Sliced_heap exclusively for Pd_session_component objects is created in core's main function. In base/src/core/main.cc: !static Sliced_heap pd_sliced_heap(env()->ram_session(), env()->rm_session()); ![...] !static Pd_root pd_root(e, e, pager_ep, &pd_sliced_heap); 2) The CR service is registered and the special Sliced_heap is passed to the Root_component<Cr_session_component> object. In base/src/core/main.cc: !static Cr_root cr_root(e, &sliced_heap, &pd_sliced_heap); ![...] !static Local_service ls[] = { ! Local_service(Cr_session::service_name(), &cr_root), ![...] !} 3) In the implementation of the checkpoint method the Sliced_heap (stored in _alloced_pds) is searched for a Pd_session_component with a specific label string. The class implementing the Cr service (Genode::Cr_session_component : Rpc_object<Cr_session>) is a friend class in Sliced_heap and is allowed to access the _blocks member variable containing the Pd_session_component objects. In base/src/core/include/cr_session_component.h (newly created file): !bool checkpoint(String<64> label) !{ ! Pd_session_component *pd = nullptr; ! bool found = false; ! Sliced_heap::Block *b = _alloced_pds->_blocks.first(); ! for(; (b != 0) && !found; b = b->next()) ! { ! pd = reinterpret_cast<Pd_session_component*>(b + 1); ! if(label == pd->_label.string) found = true; ! } 4) The Pd_session_component object is known and now it shall be used to access the test component's address space content. To retrieve the content I want to attach the Dataspace of the component's Region_map to core's Region_map. In base/src/core/include/cr_session_component.h (newly created file): ! Capability<Region_map> rm_cap = pd->address_space(); ! Region_map_client rm_client(rm_cap); ! void* addr = core_env()->rm_session()->attach(rm_client.dataspace()); ! return true; !} 5) After invoking rm_client.dataspace() the Rpc method never returns and the test scenario times out. What am I doing wrong? I compared the source code of other core services with the CR service and found no usage of classes derived from Rpc_client belonging to other core services. Is it not possible to use Rpc methods in core? I tested another solution where I only use Rpc_objects directly. I used pd_session_component::address_space_region_map() to access the address_space directly, where I think to find the memory content of the test component (Please correct me, if I am wrong). The following listing replaces the listing in step 4. In base/src/core/include/cr_session_component.h (newly created file): ! Dataspace_capability ds_cap = pd->address_space_region_map().dataspace(); ! char* addr = core_env()->rm_session()->attach(ds_cap); ! log("Attaching dataspace: Returned pointer: ", addr); ! ! Dataspace_component *ds_comp = pd->address_space_region_map().dataspace_component(); ! log("Reading dataspace component"); ! log("phys_addr = ", ds_comp->phys_addr(), " size = ", ds_comp->size(), " writable = ", ds_comp->writable() ? "true" : "false"); The output of the log function was the following: Attaching dataspace: Returned pointer: 0x00000000 Reading dataspace component phys_addr = 0 size = 3221221376 writable = false Now I got a null pointer and cannot read the content of the Region_map of the test component. Can someone help me to answer the following questions: * Can I use Capability invokation in core, where the Rpc_object belongs to another core service? If yes, how? Perhaps, my problem is the correct retrieval of the Pd_session_component, thus I can invalid Capabilities. * Why do I get an invalid pointer from the attach method of core's Region_map? Is it not allowed to attach dataspaces in core? Are they already attached in core, and I only need the pointer to the memory? Is the Dataspace_capability invalid? Kind regards Denis

2 4

Genode Scheduling TrustZone Demo
by Stefan Brenner 01 Aug '16

01 Aug '16

Hi, we are using inject_irq() from Martin Stein to inject interrupts into the normal world VM running Linux. When measuring the time between issuing inject_irq() and actually arriving at the ISR in normal world (using CPU performance counters in CPU cycles granularity) we can see that this always requires at least 10 million cycles, which is 10ms at 1Ghz and exactly what is defined as cpu_fill_ms in base-hw/src/core/include/kernel/configuration.h. If we set cpu_fill_ms to 1, we can measure that it only requires 1 million cycles. Apparently it is not possible to set values below 1 (some assertion fails on compile). Is there another option, probably a more elegant one, that allows the acceleration of interrupt injection? Best, Stefan. -- M.Sc. Stefan Brenner Institute of Operating Systems and Computer Networks Distributed Systems Group TU Braunschweig www: https://www.ibr.cs.tu-bs.de/users/brenner mail: brenner@...290... xmpp: brenner@...369...

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Re: Sending data to offline system doesn't work reliably
by Johanna Steer 29 Jul '16

29 Jul '16

Hi Sebastian, i am using QEMU. Regards, Johanna >Hi Johanna, > >On 07/26/2016 10:58 AM, Johanna Steer wrote: >> Hi, >> >> i am working on a toolchain monitoring the schedluing behavior of the >> fiasco.oc kernel. The data is monitored through the trace service (quota >> for trace is 2M). >> It is then sent to an offline system through an active TCP/IP connection >> and written into a database. VDE is used for that and i am working on >> Ubuntu 14.04. >> My problem is that the data isn't sent reliably. I am executing a >> periodic task that returns zero and exits. The only thing that varies is >> the period. After 20 seconds the tasks stop, the monitored data is >> gathered and then sent to the offline system. >> The kernel says that it is sending the data, but the system freezes at >> times and the data simply doesn't arrive. >> The system reacts quite randomly: Sometimes it sends the files, >> sometimes it doesn't. Sometimes i get an error (shown below). It seems >> easier to send small data sizes (around 200KB), above 700KB hardly >> anything works. In between, it might work or not. As far as i have >> experienced there is no pattern behind it. >> >> I tried the tests before with only 1M quota for trace and the >> reliability improved with 2M quota. However, with 4M it gets worse again >> and the error occures more often. >> >> >> Here ist the error: >> >> [init -> nic_drv] tx fifo overrun, ignore packet > >This error comes from the lan9118 NIC driver. It is a network card >driver we use for the PBXA9 ARM platform in Qemu only. We have never >used it on real hardware, and therefore, it might not work correctly >there. What SoC are you using or do you use Qemu? > >Regards, > >Sebastian > >> : spawn id exp6 not open >> while executing >> "expect { >> -i $running_spawn_id $platform_msg { puts stderr "Error: >> platform rebooted unexpectedly"; exit -4 } >> -i $running_spawn_id -re $wait_for_re..." >> (procedure "wait_for_output" line 22) >> invoked from within >> "wait_for_output $wait_for_re $timeout_value $qemu_spawn_id" >> (procedure "run_log" line 28) >> invoked from within >> "run_log $wait_for_re $timeout_value" >> (procedure "run_genode_until" line 28) >> invoked from within >> "run_genode_until forever" >> (file "/home/johanna/Bachelorarbeit/genode/repos/dom0/run/dom0.run" >> line 132) >> invoked from within >> "source $include_name" >> ("foreach" body line 6) >> invoked from within >> "foreach include_name [get_cmd_arg --include ""] { >> # first check if the include name is absolute >> if {[string first "/" $include_name] == 0} { >> puts ..." >> (file "/home/johanna/Bachelorarbeit/genode/tool/run/run" line 642) >> >> ------------------------------------------------------------------------------ >> What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic >> patterns at an interface-level. Reveals which users, apps, and protocols are >> consuming the most bandwidth. Provides multi-vendor support for NetFlow, >> J-Flow, sFlow and other flows. Make informed decisions using capacity planning >> reports.http://sdm.link/zohodev2dev >> _______________________________________________ >> genode-main mailing list >> genode-main@...52... >>https://lists.sourcef <https://lists.sourceforge.net/lists/listinfo/genode-main>

2 1

Running Heeselicht scenario on qemu
by Parfait Tokponnon 28 Jul '16

28 Jul '16

Hello everybody; I has been fed up with restarting my computer after every compilation so, I have decided to try running the Heeselicht scenarion on qemu (not very wise but just to speed the development process). But I got some errors concerning acpi table parsing, resulting in the intel framebuffer not well detected. So because I am very poor in qemu mastering, may someone tell me whether it would take a lot of work to port the heeselicht scenario on qemu? Or join me on doing this? Any help is welcome (Here is the log file for those who are interested) -- Parfait T.

2 2

Sending data to offline system doesn't work reliably
by Johanna Steer 27 Jul '16

27 Jul '16

Hi, i am working on a toolchain monitoring the schedluing behavior of the fiasco.oc kernel. The data is monitored through the trace service (quota for trace is 2M). It is then sent to an offline system through an active TCP/IP connection and written into a database. VDE is used for that and i am working on Ubuntu 14.04. My problem is that the data isn't sent reliably. I am executing a periodic task that returns zero and exits. The only thing that varies is the period. After 20 seconds the tasks stop, the monitored data is gathered and then sent to the offline system. The kernel says that it is sending the data, but the system freezes at times and the data simply doesn't arrive. The system reacts quite randomly: Sometimes it sends the files, sometimes it doesn't. Sometimes i get an error (shown below). It seems easier to send small data sizes (around 200KB), above 700KB hardly anything works. In between, it might work or not. As far as i have experienced there is no pattern behind it. I tried the tests before with only 1M quota for trace and the reliability improved with 2M quota. However, with 4M it gets worse again and the error occures more often. Here ist the error: [init -> nic_drv] tx fifo overrun, ignore packet : spawn id exp6 not open while executing "expect { -i $running_spawn_id $platform_msg { puts stderr "Error: platform rebooted unexpectedly"; exit -4 } -i $running_spawn_id -re $wait_for_re..." (procedure "wait_for_output" line 22) invoked from within "wait_for_output $wait_for_re $timeout_value $qemu_spawn_id" (procedure "run_log" line 28) invoked from within "run_log $wait_for_re $timeout_value" (procedure "run_genode_until" line 28) invoked from within "run_genode_until forever" (file "/home/johanna/Bachelorarbeit/genode/repos/dom0/run/dom0.run" line 132) invoked from within "source $include_name" ("foreach" body line 6) invoked from within "foreach include_name [get_cmd_arg --include ""] { # first check if the include name is absolute if {[string first "/" $include_name] == 0} { puts ..." (file "/home/johanna/Bachelorarbeit/genode/tool/run/run" line 642)

2 1

CPU execution time
by Johanna Steer 26 Jul '16

26 Jul '16

Hi, i am monitoring the cpu execution time on the fiasco.oc kernel. The time is given in a unit at least 100 times smaller than milliseconds, but i can't find the exact size anywhere. My laptop has the i7-4500U Processor with 1.8 GHz if that helps. Regards, Johanna

2 1

Using interrupts to control scheduling decisions in base-hw
by Adrian Hengelhaupt 26 Jul '16

26 Jul '16

Hello, My task is to implement a preemptive scheduler for a zynq-board. Therefore I've tried to figure out how the cpu_scheduler program in repos/baseh-hw/run/cpu_scheduler.run works and whether it can be used as a foundation for my task. So, my question is: How can I utilize interrupts in order to make subsequent scheduling decisions? Thanks in advance! Greetings Adrian

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