Hi Alan,
I'm tried enable the CONFIG_PRIORITY_INHERITANCE and the problem remains, thanks for your reply Best regard Zou ------------------ Original ------------------ From: "Alan Carvalho de Assis"<acas...@gmail.com>; Date: Sun, Mar 27, 2022 10:11 PM To: "dev"<dev@nuttx.apache.org>; Subject: Re: usleep can't wake up incidentally in tickless mode Zou, just a think that passed on my mind: try to enable the CONFIG_PRIORITY_INHERITANCE and let us know if the issue will happen again in this case. BR, Alan On 3/27/22, Alan Carvalho de Assis <acas...@gmail.com> wrote: > Hi Zou, > > Is there some way to identify that thread A didn't wake up and create > some unity test to report and to analyze it? > > Maybe there is some very specific race condition that we never saw before. > > BR, > > Alan > > On 3/27/22, fft <f...@feedforward.com.cn> wrote: >> Hi team, >> >> >> I've been puzzled by a strange problem for a long time, when i use >> tickless >> OS mode on stm32f405, usleep can't wake up incidentally. >> >> My config about tickless OS mode as shown below: >> >> >> CONFIG_ARCH_HAVE_TICKLESS=y >> CONFIG_SCHED_TICKLESS=y >> # CONFIG_SCHED_TICKLESS_ALARM is not set >> # CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP is not set >> CONFIG_USEC_PER_TICK=10 >> >> # CONFIG_STM32_TICKLESS_SYSTICK is not set >> >> CONFIG_STM32_TICKLESS_TIMER=2 >> CONFIG_STM32_TICKLESS_CHANNEL=1 >> >> >> When use usleep(1000) in a pthread A, then thread A maybe sporadic sleep >> dead and can't be wake up, the probability is about 1/100000. >> Moreover, when the problem happened, if i execute usleep 10000 in NSH >> terminus, then thread A will wakeup. Is my configuration incorrect? >> >> Does anyone else have the same problem? >> >> >> Best regard >> Zou >
