3 ms·
A power issue would also plausibly explain why disabling SMT avoids the problem, since disabling SMT powers off a bunch of stuff (a whole thread context does ne
by informedperson 10y ago
A power issue would also plausibly explain why disabling SMT avoids the problem, since disabling SMT powers off a bunch of stuff (a whole thread context does need a bit of power), and, in a multi-threaded scenario, tends to reduce core usage thereby reducing average (! so likely not relevant) power draw as well.
- monocasa 10y agoAnd (probably more importantly) reduces overall IPC by around 30% generally. The whole point of SMT these days is to have continuous work for the ALUs despite recent cache misses.