Interesting, more in line with what I would expect. What lspci -vv tells
you about the chip on the PCI card?
As I wrote you this morning I did try another PCI card I found:
NetMos Technology PCI 9865 Multi-I/O Controller (prog-if 03 [IEEE1284])
The PCI card is even worse:
10 s32 OUT 534652 ppmc.0.read.time
10 s32 OUT 366536 ppmc.0.write.time
8 s32 OUT 907936 servo-thread.time
Maybe I could try to boot in rt-preempt (using rtai right now)
On Wed, Mar 21, 2018 at 9:46 PM, Jon Elson <[email protected]> wrote:
> On 03/21/2018 03:15 PM, Maxime Lemonnier wrote:
>
> OK, I checked my system with a mediocre Dell Pentium 4 CPU and a PCI card,
> and ONE universal PWM controller. ppmc.0.write was 60 us, max was 95 us.
> ppmc.0.read was 128 us, max 188 us.
> The total thread was running 386 us.
> This is a Debian Wheezy system with the rt-preempt kernel.
>
> Jon
>
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