On 7/17/2023 20:32, Paul Menzel wrote:
[Cc: +linux-pci@xxxxxxxxxxxxxxx]
Dear Sasha,
Thank you for your patch.
Maybe be more specific in the commit message summary. Maybe:
igc: Decrease PTM short interval from 10 us to 1 us
Good.
Am 17.07.23 um 19:19 schrieb Sasha Neftin:
With the 10us interval, we were seeing PTM transactions taking around
12us.
With the 1us interval, PTM dialogs took around 2us. Checked with the PCIe
sniffer.
On what board, and with what device and what firmware versions?
Any with the PTM support. HW feature and not dependent on the firmware.
Fixes: a90ec8483732 ("igc: Add support for PTP getcrosststamp()")
Suggested-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
Signed-off-by: Sasha Neftin <sasha.neftin@xxxxxxxxx>
---
drivers/net/ethernet/intel/igc/igc_defines.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h
b/drivers/net/ethernet/intel/igc/igc_defines.h
index 44a507029946..c3722f524ea7 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -549,7 +549,7 @@
#define IGC_PTM_CTRL_SHRT_CYC(usec) (((usec) & 0x2f) << 2)
#define IGC_PTM_CTRL_PTM_TO(usec) (((usec) & 0xff) << 8)
-#define IGC_PTM_SHORT_CYC_DEFAULT 10 /* Default Short/interrupted
cycle interval */
+#define IGC_PTM_SHORT_CYC_DEFAULT 1 /* Default short cycle
interval */
Why is the comment updated?
Interval, not interrupt...
#define IGC_PTM_CYC_TIME_DEFAULT 5 /* Default PTM cycle time */
#define IGC_PTM_TIMEOUT_DEFAULT 255 /* Default timeout for
PTM errors */
Kind regards,
Paul
Sasha
