Device Family: Intel® Stratix® 10, Intel® Stratix® 10 MX, Intel® Stratix® 10 TX

Type: Answers, Errata

Area: Intellectual Property


Last Modified: June 18, 2018
Version Found: v18.0
Version Fixed: v18.0 Update 1
Bug ID: FB: 564199;

Why is the Intel® Stratix® 10 E-tile Hard IP for Ethernet (10G/25G) TX Timestamp error > 1 second?

Description

Due to a problem in Intel® Quartus® Prime Pro version 18.0 and earlier, the Intel® Stratix® 10 E-tile Hard IP for Ethernet (10G/25G) will occasionally issue a TX timestamp that is 1 second larger than expected. This causes an inaccurate error of +1 second in the TX timestamp.

Workaround/Fix

A possible work around to this problem would be to compare the TX timestamp against the time-of-day(ToD), and then subtract 1 second from it if the timestamp is 1 second larger than the ToD.

This problem is scheduled to be fixed in the next release of the Intel® Quartus® Prime software.