Hi Joakim,
On 02/09/15 14:20, Joakim Gebart wrote:
Has anyone measured the cost of the thread context switching on the
different platforms? I'm mainly interested in Cortex-M4 (Kinetis). This
would be a good indication of how slow an I/O device has to be before
it is worth it to manually yield a
Hi,
we do indeed have a number of places in the driver code, where busy
waiting is used. The reason for this is mostly missing man power to
implement better versions of the same driver. The most important fact
here is, that you can re-implement a driver in a more efficient way
completely
Hi again,
On 09.02.2015 14:33, Kaspar Schleiser wrote:
Hi Joakim,
On 02/09/15 14:20, Joakim Gebart wrote:
Has anyone measured the cost of the thread context switching on the
different platforms? I'm mainly interested in Cortex-M4 (Kinetis). This
would be a good indication of how slow an I/O
Hi Frank,
On Sun, Feb 08, 2015 at 11:47:25AM +0100, Frank Holtz wrote:
i have looked into periph drivers and found a lot of single line while
statements waiting for finishing things.
...
Slow devices like ADC, Flash, UART or Random number generation are
wasting a lot of CPU cycles while
