Hello Adrian,
* Adrian-Ken Rueegsegger <k...@codelabs.ch> [2015-07-09 15:59:11 +0200]: > The first set of numbers for the top 10 threads were collected when > pressing a key in the guest VM bootloader. So they basically cover the > base-hw/Virtualbox init and start: > > pd_label | label | spent | % of total > ---------------------+--------------+------------+----------- > init -> virtualbox | EMT | 5283917631 | 39.8206% > init -> virtualbox | virtualbox | 4629194169 | 34.8865% > init -> rtc_drv | rtc_ep | 1439510978 | 10.8484% > init -> rtc_drv | rtc_drv | 698105922 | 5.2611% > init -> fb_drv | vesa_ep | 221176830 | 1.6668% > init | init | 150973892 | 1.1378% > init -> timer | timer_drv_ep | 142735932 | 1.0757% > init -> ps2_drv | ps2_drv_ep | 132941808 | 1.0019% > init -> ps2_drv | ps2_drv | 125508496 | 0.9459% > init -> platform_drv | platform_drv | 107468792 | 0.8099% > > The second set was collected once the Linux system has booted to the > command prompt: > > pd_label | label | spent | % of total > -------------------+-------------------+-------------+----------- > init -> virtualbox | EMT | 97132063560 | 89.9964% > init -> virtualbox | virtualbox | 4631019033 | 4.2908% > init -> timer | timer_drv_ep | 2135808255 | 1.9789% > init -> rtc_drv | rtc_ep | 1439510978 | 1.3338% > init -> rtc_drv | rtc_drv | 698105922 | 0.6468% > init -> virtualbox | Timer | 313374324 | 0.2904% > init -> fb_drv | vesa_ep | 238903418 | 0.2214% > init -> virtualbox | alarm-timer | 207690920 | 0.1924% > init -> timer | timeout_scheduler | 199926872 | 0.1852% > core | pager_activation | 155622972 | 0.1442% Since the stats are absolute it would be best to reset them to zero before collecting them a second time. In this case the rtc_drv should not be in the top range anymore because it should not be used by vbox while it is running but only once when it starts. > I do not know the implementation details of rtc_drv but I did not expect > it to make the top 10. I did not expect this either. Although it is indeed somewhat expensive (i.e. it should be avoided to read it several times a second), I cannot imagine why it takes about 10% of the total time when starting vbox. It basically reads the time from the cmos which merely involves an IPC to core to read the I/O port. It would be good to know if the number of calls of the rtc_drv differ between base-hw and base-nova. Regards Josef ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
