On Sun, Feb 11, 2024 at 08:38:15PM +0100, Paul Menzel wrote: > Am 08.02.24 um 18:33 schrieb Andy Shevchenko: > > On Thu, Feb 08, 2024 at 08:59:28AM +0000, Lee Jones wrote: > > > On Tue, 06 Feb 2024, Paul Menzel wrote: ... > > > > On the Dell XPS 13 9360 and Linux 6.8-rc3+, `intel_lpss_pci_driver_init()` > > > > takes 23.8 ms, making it one of Linux’ longer init functions on this device: > > > > Does it mean on the previous releases it was different? > > I mean is it a regression or always was like this? Okay. ... > but this seems to have a big affect on ACPI/ASL operations, and execution > time increases to 125 ms. This breaks down to > > 1. `i2c_acpi_find_bus_speed()` (96.985 ms @ 3.008753), where > `acpi_walk_namespace()` takes this time. > 2. `i2c_dw_probe_master()` (27.161 ms @ 3.105964) → > i2c_add_numbered_adapter()` → `i2c_add_adapter()` → `i2c_register_adapter()` > → `i2c_acpi_register_devices()` → `acpi_ns_walk_namespace()` (24.178 ms @ > 3.108927) > > No idea if this is a red herring, and the long time is actually do to > something else. Might be related https://github.com/acpica/acpica/pull/897 Wonder if it helps you anyhow. -- With Best Regards, Andy Shevchenko
