users January 2016

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34 participants
30 discussions

netperf
by Анна Будкина 07 Jun '16

07 Jun '16

Hello! I'm running netperf TCP_STREAM and TCP_MAERTS tests for lxip stack and i obtained extremely low result - 5x10^6 bits/s while the maximum throughput is 1000 mbit/s . I wonder what could be the reason for that. Anna

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why use ambient authority in genode hello world?
by Dan Connolly 10 Feb '16

10 Feb '16

In a 2 Dec twitter conversation <https://twitter.com/GenodeLabs/status/671941252162678784>, I was invited to elaborate here; so... I wholeheartedly agree when the Genode book <http://genode.org/documentation/genode-foundations-15-05.pdf> says: *Capability-based security* supposedly makes security easy to use by > providing an > intuitive way to manage authority without the need for an all-encompassing > and > complex global system policy. I don't understand why ignore this principle with the hello world code example: #include <base/printf.h> > int main() > { > Genode::printf("Hello world\n"); > return 0; > } Why appeal to ambient authority to print to the console? Why not pass a capability to main, as pony does with env <https://github.com/CausalityLtd/ponyc/blob/master/packages/builtin/env.pony>, capsicum at cap_enter() <http://lwn.net/Articles/482858/>, etc? At lower levels of the architecture, genode has this structure; e.g. 3.5 component creation: The environment is constructed by successively requesting the component’s > RM, RAM, CPU, and PD sessions from its parent. Why not continue this structure in the base API? -- Dan Connolly http://www.madmode.com/

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Re: Hash sum check for qtscriptclassic-1.0_1-opensource failed
by Bent Bracke 27 Jan '16

27 Jan '16

Hi Ah, thank you, that worked. Kind regards Bent Bracke > On 27. jan. 2016, at 01.53, Nobody III <hungryninja101@...9...> wrote: > > You need to update qt5.hash. qt5.hash is an SHA1 hash of qt5.port. I've had this problem before. Whenever you change a .port file, you need to update its corresponding .hash file. > >> On Tue, Jan 26, 2016 at 1:30 PM, Evolux OS <admin@...395...> wrote: >> Forgot to mention: >> >> It actually fails earlier: >> Error: Download for qtscriptclassic-1.0_1-opensource failed >> make[2]: *** [qtscriptclassic-1.0_1-opensource.file] Error 1 >> make[1]: *** [_install_in_port_dir] Error 2 >> make: *** [prepare-qt5] Error 2 >> >> I fixed that by manually downloading the file and changing the link to point to the downloaded file. >> >> Steps to reproduce: >> >> 1. Install toolchain (sudo tar xPfj genode-toolchain-15.5-x86_64.tar.bz2) >> 2. git clone git://github.com/genodelabs/genode.git >> 3.cd genode/repos/libports >> 4.make prepare >> >> kind regards >> Bent Bracke >> >> -- >> Evolux OS >> Sent with Sparrow >> >>> On Tuesday 26 January 2016 at 20:36, Bent Bracke wrote: >>> >>>> On Tuesday 26 January 2016 at 13:37, Christian Helmuth wrote: >>>> Hello Bent, >>>> >>>>> On Mon, Jan 25, 2016 at 08:52:51PM +0100, Bent Bracke wrote: >>>>> When trying to “make prepare” the lib ports directory I get the following error: >>>>> >>>>> "Hash sum check for qtscriptclassic-1.0_1-opensource failed“ >>>> >>>> I tried to reproduce your issue just now, but it works as expected. >>>> >>>>> The hash seems to be correct. >>>> >>>> What do you mean by "hash seems to be correct"? Did you run sha1sum >>>> manually? >>> Yes, >>> >>> >>>>> Any ideas? >>>> Which Genode release do you use? >>> >>> 15.11 >>> >>> >>>> In the past, we had an issue with a custom version of the sha1sum >>>> tool, which produced incompatible output. If I run it manually on >>>> Ubuntu 12.04 I get >>>> >>>> > sha1sum contrib/qt5-4d7c2192509a580b54ac069e68f1e9ac4d9159bd.incomplete/qtscriptclassic-1.0_1-opensource.tar.gz >>>> 74e9dc82dd194d8ae0fb0f8f1df74081948b943a contrib/qt5-4d7c2192509a580b54ac069e68f1e9ac4d9159bd.incomplete/qtscriptclassic-1.0_1-opensource.tar.gz >>>> >>>> Can you confirm that your output is similar? >>> >>> Yes, 74e9dc82dd194d8ae0fb0f8f1df74081948b943a qtscriptclassic-1.0_1-opensource.tar.gz >>> This is on Ubuntu 14.04. >>> >>> >>> Kind regards >>> Bent Bracke >>> >>> ------------------------------------------------------------------------------ >>> Site24x7 APM Insight: Get Deep Visibility into Application Performance >>> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >>> Monitor end-to-end web transactions and take corrective actions now >>> Troubleshoot faster and improve end-user experience. Signup Now! >>> http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 >>> _______________________________________________ >>> genode-main mailing list >>> genode-main(a)lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/genode-main >> >> >> ------------------------------------------------------------------------------ >> Site24x7 APM Insight: Get Deep Visibility into Application Performance >> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >> Monitor end-to-end web transactions and take corrective actions now >> Troubleshoot faster and improve end-user experience. Signup Now! >> http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 >> _______________________________________________ >> genode-main mailing list >> genode-main(a)lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/genode-main > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > _______________________________________________ > genode-main mailing list > genode-main(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/genode-main

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RE: FUSE + VFS
by Samuel Hall 27 Jan '16

27 Jan '16

Hello, Thank you for the response. In the implementation described in the article VFS isn't used due to the fact, that VFS wasn't available in genode at that time. A comment of the libc_fuse plugin states: /* * During the initialization of the plugin, we already require the VFS. * Hence, we need to make sure to initialize the VFS before doing our * own initialization. */ So does the current implementation, when using a FUSE fs via the libc plugin, require VFS? Is there any more detailed information about the VFS in genode? I am particularly interested in finding out how the flow of a FUSE call differs in genode compared to the "normal" call as shown in this graphic [1]. When using a FUSE based fs as a file system server as described in Josef's response, do any adjustments have to be made to the FUSE fs so it runs on genode? Kind regards Hall Samuel [1] http://usr.sysret.de/jws/porting_fuse/img/490px-FUSE_structure.svg.png

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Green task stacks
by Igor 27 Jan '16

27 Jan '16

Hello! Genode Thread class already have infrastructure for implementing the green tasks: alloc_secondary_stack() which used i.e. in dde_linux to emulate the Linux kernel behavior. These secondary stacks have fixed maximal size and live one below another, so they can overlap each other. It is possible to create different Dataspace lists for each green stack and then switch them. Right now Genode hasn't the method for switching several DSs at once, so each DS in that list should be switched individually which would be too expensive. The question is: even having that method, can we still consider our tasks "green"? Or such complexity is no better than the ordinal thread complexity? Thanks!

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Re: sd_card driver Block service prevents FFAT file system use by multiple clients?
by Nobody III 27 Jan '16

27 Jan '16

You're trying to make a second connection to the Block service, but you should be making a second connection to the File_system service. The Block service only provides a random-access chunk of memory, not access to files. On Jan 26, 2016 6:35 PM, "Bob Stewart" <robjsstewart@...196...> wrote: Hi, I was doing some testing with the 3rd party FFAT file system which multiplexes clients accessing the file system. This was done in base-hw on release 15.11. The first client connected to the file system as expected and two files were read and processed. When the second client attempted to make a connection to the Block service, a "could not open block connection" error was issued by the disk_initialize method in diskio_block.cc. (partial log below). The Block service is provided by an sd_card driver (identical to the omap4 driver for the Panda board). Based on my limited understanding of the Genode architecture, I would think that is the correct behavior since the first client is still connected and that the a multiplexer for the service needs to be provided. If that is correct, the FFAT file system effectively does not multiplex client connections in a useful manner, for this scenario. How would one go about doing that? Bob Stewart [init -> pruss_drv] void init_libc_ffat(): using the libc_ffat plugin [init -> pruss_drv] --- am33xx PRU driver --- [init -> pruss_drv] PRUSS quota super period 1000000 [init -> pruss_drv] PRUSS quota 199981 [init -> motor_ctl] --- Motor Control application starting --- [init -> Autopilot] void init_libc_ffat(): using the libc_ffat plugin [init -> Autopilot] --- Autopilot application starting --- [init -> sd_card_drv] CID: 0x1d414453 0x44202020 0x02b16703 0xea00d927 [init -> sd_card_drv] RCA: 0x59b4 Quota exceeded! amount=24576, size=12288, consumed=24576 [init -> sd_card_drv] Block::Omap3_driver::Omap3_driver(bool): SDCard driver getting m mc1 ready with dma 0 [init -> sd_card_drv] SD card detected [init -> sd_card_drv] capacity: 60303 MiB [init -> pruss_drv] Loaded PRU-0 program 123 words [init -> pruss_drv] Loaded PRU-1 program 337 words [init -> Autopilot] opening file /Autopilot/ap_config.xml [init -> Autopilot] could not open block connection [init -> Autopilot] No file system available [init] virtual void Genode::Child_policy::exit(int): child "Autopilot" exited with exi t value -1 [init -> motor_ctl] Config not set in time [init] virtual void Genode::Child_policy::exit(int): child "motor_ctl" exited with exi t value -2 ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ genode-main mailing list genode-main(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main

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sd_card driver Block service prevents FFAT file system use by multiple clients?
by Bob Stewart 27 Jan '16

27 Jan '16

Hi, I was doing some testing with the 3rd party FFAT file system which multiplexes clients accessing the file system. This was done in base-hw on release 15.11. The first client connected to the file system as expected and two files were read and processed. When the second client attempted to make a connection to the Block service, a "could not open block connection" error was issued by the disk_initialize method in diskio_block.cc. (partial log below). The Block service is provided by an sd_card driver (identical to the omap4 driver for the Panda board). Based on my limited understanding of the Genode architecture, I would think that is the correct behavior since the first client is still connected and that the a multiplexer for the service needs to be provided. If that is correct, the FFAT file system effectively does not multiplex client connections in a useful manner, for this scenario. How would one go about doing that? Bob Stewart [init -> pruss_drv] void init_libc_ffat(): using the libc_ffat plugin [init -> pruss_drv] --- am33xx PRU driver --- [init -> pruss_drv] PRUSS quota super period 1000000 [init -> pruss_drv] PRUSS quota 199981 [init -> motor_ctl] --- Motor Control application starting --- [init -> Autopilot] void init_libc_ffat(): using the libc_ffat plugin [init -> Autopilot] --- Autopilot application starting --- [init -> sd_card_drv] CID: 0x1d414453 0x44202020 0x02b16703 0xea00d927 [init -> sd_card_drv] RCA: 0x59b4 Quota exceeded! amount=24576, size=12288, consumed=24576 [init -> sd_card_drv] Block::Omap3_driver::Omap3_driver(bool): SDCard driver getting m mc1 ready with dma 0 [init -> sd_card_drv] SD card detected [init -> sd_card_drv] capacity: 60303 MiB [init -> pruss_drv] Loaded PRU-0 program 123 words [init -> pruss_drv] Loaded PRU-1 program 337 words [init -> Autopilot] opening file /Autopilot/ap_config.xml [init -> Autopilot] could not open block connection [init -> Autopilot] No file system available [init] virtual void Genode::Child_policy::exit(int): child "Autopilot" exited with exi t value -1 [init -> motor_ctl] Config not set in time [init] virtual void Genode::Child_policy::exit(int): child "motor_ctl" exited with exi t value -2

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Hash sum check for qtscriptclassic-1.0_1-opensource failed
by Bent Bracke 27 Jan '16

27 Jan '16

Hi When trying to “make prepare” the lib ports directory I get the following error: "Hash sum check for qtscriptclassic-1.0_1-opensource failed“ The hash seems to be correct. Any ideas? kind regards Bent Bracke

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Loading component configuration from file with lx_fs.
by Mikael Sahlström 25 Jan '16

25 Jan '16

Hi! I would like to load a component configuration from a file on linux. So I've added a lx_fs and a fs_rom component that replaces my dynamic_rom component without changing any code in my component. So far is everything good (I hope!). To my questions: 1. How do I state which file to read? 2. My understanding is that the root attribute in lx_fs defines which directory genode will see as root. But anything except "/" here results in the error message "Session root directory "..." does not exist". 3. Do I write the same thing in the config file as I did when having the dynamic_rom (<config attribute="value" .... />)? My configuration: <start name="component"> <resource name="RAM" quantum="5M"/> <route> <service name="ROM"> <child name="fs_rom"/> </service> <any-service> <parent/> <any-child/> </any-service> </route> </start> <start name="fs_rom"> <resource name="RAM" quantum="4M" /> <provides> <service name="ROM" /> </provides> <route> <service name="File_system"> <child name="lx_fs" /> </service> <any-service> <parent/> <any-child/> </any-service> </route> </start> <start name="lx_fs"> <resource name="RAM" quantum="4M" /> <provides> <service name="File_system" /> </provides> <config> <policy label="fs_rom" root="/" writable="no" /> </config> </start> Thanks!

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Writing to two different dataspaces at the same time
by David Werner 25 Jan '16

25 Jan '16

Hello Genode Community, i am new to Genode and i have two questions. 1) Is it somehow possible to back a virtual address range with two different dataspaces (attaching two different dataspaces at the same virtual address is obviously not possible) ? What i want to achieve is that writing to a virtual address results in writing to two dataspaces at the same time, so that the dataspaces have the same content. 2) As far as i know a thread has to be added to a rm session as a client in order to be able to use it as layout for its virtual address space. Is it possible for a thread to operate on two different rm_sessions at the same time? Best Regards, David

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users January 2016