On Thu, Nov 23, 2017 at 10:35:42AM +0100, Ladislav Michl wrote: > On Thu, Nov 16, 2017 at 03:04:48PM -0600, Grygorii Strashko wrote: > [snip] > > I recommend to disable CPU idle completely in config and re-check test, > > before continue with other things. > > Strangely enough latency is much worse with CONFIG_CPU_IDLE disabled. While it is better with: CONFIG_HZ_PERIODIC=y CONFIG_CPU_FREQ=n CONFIG_PM=n But both ehci and musb does not see any device connected and: IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96 interrupts Clocking rate (Crystal/Core/MPU): 26.0/400/600 MHz ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at arch/arm/mach-omap2/omap_hwmod.c:2098 _enable+0x48/0x234 omap_hwmod: timer1: enabled state can only be entered from initialized, idle, or disabled state Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 4.14.1-00048-gfa283847c99a #12 Hardware name: Generic OMAP36xx (Flattened Device Tree) [<c010c304>] (unwind_backtrace) from [<c010a708>] (show_stack+0x10/0x14) [<c010a708>] (show_stack) from [<c012395c>] (__warn+0xdc/0xf8) [<c012395c>] (__warn) from [<c01239ac>] (warn_slowpath_fmt+0x34/0x44) [<c01239ac>] (warn_slowpath_fmt) from [<c0117e50>] (_enable+0x48/0x234) [<c0117e50>] (_enable) from [<c01184e0>] (omap_hwmod_enable+0x18/0x28) [<c01184e0>] (omap_hwmod_enable) from [<c07083a8>] (omap_dm_timer_init_one+0x150/0x248) [<c07083a8>] (omap_dm_timer_init_one) from [<c0708550>] (__omap_sync32k_timer_init.constprop.1+0x74/0x234) [<c0708550>] (__omap_sync32k_timer_init.constprop.1) from [<c0708734>] (omap_init_time+0x24/0x38) [<c0708734>] (omap_init_time) from [<c0700abc>] (start_kernel+0x208/0x378) [<c0700abc>] (start_kernel) from [<80008078>] (0x80008078) ---[ end trace 6bf4eb748e85f1ee ]--- OMAP clockevent source: timer1 at 32768 Hz ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at arch/arm/mach-omap2/omap_hwmod.c:2098 _enable+0x48/0x234 omap_hwmod: counter_32k: enabled state can only be entered from initialized, idle, or disabled state Modules linked in: CPU: 0 PID: 0 Comm: swapper Tainted: G W 4.14.1-00048-gfa283847c99a #12 Hardware name: Generic OMAP36xx (Flattened Device Tree) [<c010c304>] (unwind_backtrace) from [<c010a708>] (show_stack+0x10/0x14) [<c010a708>] (show_stack) from [<c012395c>] (__warn+0xdc/0xf8) [<c012395c>] (__warn) from [<c01239ac>] (warn_slowpath_fmt+0x34/0x44) [<c01239ac>] (warn_slowpath_fmt) from [<c0117e50>] (_enable+0x48/0x234) [<c0117e50>] (_enable) from [<c01184e0>] (omap_hwmod_enable+0x18/0x28) [<c01184e0>] (omap_hwmod_enable) from [<c07086bc>] (__omap_sync32k_timer_init.constprop.1+0x1e0/0x234) [<c07086bc>] (__omap_sync32k_timer_init.constprop.1) from [<c0708734>] (omap_init_time+0x24/0x38) [<c0708734>] (omap_init_time) from [<c0700abc>] (start_kernel+0x208/0x378) [<c0700abc>] (start_kernel) from [<80008078>] (0x80008078) ---[ end trace 6bf4eb748e85f1ef ]--- omap2_sync32k_clocksource_init: failed to enable counter_32k module (-22) Is it expected? ladis -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
