[Kernel-packages] [Bug 1925026] Re: Timer of 100us causes 64-bit app spin on Pi4
** Tags added: raspi-image -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1925026 Title: Timer of 100us causes 64-bit app spin on Pi4 Status in linux package in Ubuntu: Confirmed Bug description: This problem happens with 64-bit 20.04 LTS or 20.10 on a Raspberry Pi 4 w/4GB (I am using the official Ubuntu Pi versions). It does NOT happen with either version when running on a standard x86 machine or VM. Also, it does NOT happen when using the 64-bit Raspberry Pi OS (https://downloads.raspberrypi.org/raspios_arm64/images/). So this issue is specific to the official 64-bit Ubuntu on Raspberry Pi version. When a 100us timer is started (via setitimer) the app will spin at 100%. With values slightly higher (150, 200, 1000) this does not happen. I've included the source for a small timer test program that I found reproduces the issue that broke my larger formal app. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925026/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1925026] Re: Timer of 100us causes 64-bit app spin on Pi4
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1925026 Title: Timer of 100us causes 64-bit app spin on Pi4 Status in linux package in Ubuntu: Confirmed Bug description: This problem happens with 64-bit 20.04 LTS or 20.10 on a Raspberry Pi 4 w/4GB (I am using the official Ubuntu Pi versions). It does NOT happen with either version when running on a standard x86 machine or VM. Also, it does NOT happen when using the 64-bit Raspberry Pi OS (https://downloads.raspberrypi.org/raspios_arm64/images/). So this issue is specific to the official 64-bit Ubuntu on Raspberry Pi version. When a 100us timer is started (via setitimer) the app will spin at 100%. With values slightly higher (150, 200, 1000) this does not happen. I've included the source for a small timer test program that I found reproduces the issue that broke my larger formal app. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925026/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1925026] Re: Timer of 100us causes 64-bit app spin on Pi4
** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1925026 Title: Timer of 100us causes 64-bit app spin on Pi4 Status in linux package in Ubuntu: New Bug description: This problem happens with 64-bit 20.04 LTS or 20.10 on a Raspberry Pi 4 w/4GB (I am using the official Ubuntu Pi versions). It does NOT happen with either version when running on a standard x86 machine or VM. Also, it does NOT happen when using the 64-bit Raspberry Pi OS (https://downloads.raspberrypi.org/raspios_arm64/images/). So this issue is specific to the official 64-bit Ubuntu on Raspberry Pi version. When a 100us timer is started (via setitimer) the app will spin at 100%. With values slightly higher (150, 200, 1000) this does not happen. I've included the source for a small timer test program that I found reproduces the issue that broke my larger formal app. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925026/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
