4 ms·

I think the original hwbot posting is the better article. http://forum.hwbot.org/showthread.php?t=167605 http://forum.hwbot.org/showthread.php?t=167605 The or

I think the original hwbot posting is the better article. http://forum.hwbot.org/showthread.php?t=167605 http://forum.hwbot.org/showthread.php?t=167605 The original post has been updated as more facts came along. It verified that the bug was reproducible on other machines. And then it said: Update 3/16/2017: As much as I had least expected this to be the case, this appears to have been confirmed as an errata in the AMD Zen processor. And then it goes on to say: Fortunately, it's one that is fixable with a microcode update and will not result in something catastrophic like a recall or the disabling of features. Basically, this is an awesome bug report. HN should link to it rather than the techpowerup article.

sriramkarnati 10y ago
The issue seems to be fixed: http://forum.hwbot.org/showpost.php?p=480922&postcount=30 http://forum.hwbot.org/showpost.php?p=480922&postcount=30 http://forum.hwbot.org/showpost.php?p=480524&postcount=25 http://forum.hwbot.org/showpost.php?p=480524&postcount=25 https://www.bit-tech.net/news/hardware/2017/03/21/amd-ryzen-fma3-fix-promise/1 https://www.bit-tech.net/news/hardware/2017/03/21/amd-ryzen-...
gghh 10y ago
ah! the author of that hwbot.org post is Alex Yee; I remember his name as he wrote that insanely upvoted (and awesome) stackoverflow answer on branch misprediction: http://stackoverflow.com/a/11227902 http://stackoverflow.com/a/11227902
tedunangst 10y ago
Unfortunately, it's just a full page ad telling me to install some app. back
i336_ 10y ago
Can concur - multiple comments in the linked article show confusion as as to why this is even a problem "because the benchmark program in question has CPU-series-specific binaries, and it didn't release one for Ryzen yet" (paraphrasing). Ouch. Whoosh...
dang 10y ago
Ok, we changed to that from https://www.techpowerup.com/231536/amd-ryzen-machine-crashes-to-a-sequence-of-fma3-instructions https://www.techpowerup.com/231536/amd-ryzen-machine-crashes.... Thanks! Btw everybody, if you notice something like this or see a comment by someone who has, and you have a minute to drop us a note at hn@ycombinator.com, it's a real community service if you do so. Then we can change the URL (or title or what have you) sooner than 19 hours in—or rather, sooner than never, since we only found out about this one by a user telling us. We can't come close to reading all the comments but we do see all the emails and (usually) act on the time-sensitive ones quickly even if we can't reply till a bit later.

sriramkarnati 10y ago

The issue seems to be fixed: http://forum.hwbot.org/showpost.php?p=480922&postcount=30 http://forum.hwbot.org/showpost.php?p=480922&postcount=30 http://forum.hwbot.org/showpost.php?p=480524&postcount=25 http://forum.hwbot.org/showpost.php?p=480524&postcount=25 https://www.bit-tech.net/news/hardware/2017/03/21/amd-ryzen-fma3-fix-promise/1 https://www.bit-tech.net/news/hardware/2017/03/21/amd-ryzen-...

gghh 10y ago

ah! the author of that hwbot.org post is Alex Yee; I remember his name as he wrote that insanely upvoted (and awesome) stackoverflow answer on branch misprediction: http://stackoverflow.com/a/11227902 http://stackoverflow.com/a/11227902

tedunangst 10y ago

Unfortunately, it's just a full page ad telling me to install some app. back

i336_ 10y ago

Can concur - multiple comments in the linked article show confusion as as to why this is even a problem "because the benchmark program in question has CPU-series-specific binaries, and it didn't release one for Ryzen yet" (paraphrasing). Ouch. Whoosh...

dang 10y ago

Ok, we changed to that from https://www.techpowerup.com/231536/amd-ryzen-machine-crashes-to-a-sequence-of-fma3-instructions https://www.techpowerup.com/231536/amd-ryzen-machine-crashes.... Thanks! Btw everybody, if you notice something like this or see a comment by someone who has, and you have a minute to drop us a note at hn@ycombinator.com, it's a real community service if you do so. Then we can change the URL (or title or what have you) sooner than 19 hours in—or rather, sooner than never, since we only found out about this one by a user telling us. We can't come close to reading all the comments but we do see all the emails and (usually) act on the time-sensitive ones quickly even if we can't reply till a bit later.