On Tue, Jun 25, 2024 at 12:18:04PM +0900, Takashi Sakamoto wrote:
> Hi,
>
> 1394 OHCI hardware triggers PCI interrupts to notify any events to
> software. Current driver for the hardware is programmed by the typical
> way to utilize top- and bottom- halves, thus it has a timing gap to handle
> the notification in softIRQ (tasklet). The Linux Kernel Tracepoints
> framework is enough useful to trace the interaction between 1394 OHCI
> hardware and its driver.
>
> This series of changes adds support for tracepoints events to the
> driver, and adds an event, 'irqs', so that comparison of the event and
> any event in firewire subsystem is helpful to diagnose the timing gap.
>
> Takashi Sakamoto (2):
> firewire: ohci: add support for Linux kernel tracepoints
> firewire: ohci: add tracepoints event for hardIRQ event
>
> drivers/firewire/ohci.c | 4 +++
> include/trace/events/firewire.h | 1 +
> include/trace/events/firewire_ohci.h | 47 ++++++++++++++++++++++++++++
> 3 files changed, 52 insertions(+)
> create mode 100644 include/trace/events/firewire_ohci.h
Applied to for-next branch.
Regards
Takashi Sakamoto