Re: numastats updates
Christoph Lameter <[email protected]> Tue, 8 Apr 2014 11:57:58 -0500 (CDT)
| Newsgroups | org.kernel.vger.linux-numa,it.linux.lists.ltp,org.kvack.linux-mm |
|---|---|
| Message-ID | <alpine.DEB.2.10.1404081153460.12735@nuc> |
On Tue, 8 Apr 2014, Stanislav Kholmanskikh wrote: > On a two-node system it prints: > 1: 294 .. > 20: 294 > > i.e. everything is ok. > > But on an eight-node system: > 1: 173 > 2: 0 > 3: 0 > 4: 173 > 5: 173 > So in general we can't rely on stat_interval value. Correct? Owww... This could have something to do with the tick being disabled on idle without regard for pending vmstat updates. The processor goes to sleep and never updates the global counters. Once in awhile the processor wakes up to deal with the statistics. The idle logic needs to check that all differentials are folded before going to slee. Frederic: Can we add such a check? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to [email protected]. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"[email protected]"> [email protected] </a>