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Messages in this thread |
Pavel Machek wrote: > Hi! > > >>Standard Kernel on a 512 Cpu machine allocating 32GB with an increasing >>number of threads (and thus increasing parallellism of page faults): >> >> Gb Rep Threads User System Wall flt/cpu/s fault/wsec >> 32 3 1 1.416s 138.165s 139.050s 45073.831 45097.498 > > ... > >>Patched kernel: >> >>Gb Rep Threads User System Wall flt/cpu/s fault/wsec >> 32 3 1 1.098s 138.544s 139.063s 45053.657 45057.920 > > ... > >>These number are roughly equal to what can be accomplished with the >>page fault scalability patches. >> >>Kernel patches with both the page fault scalability patches and >>prefaulting: >> >> Gb Rep Threads User System Wall flt/cpu/s fault/wsec >> 32 10 1 4.103s 456.384s 460.046s 45541.992 45544.369 > > ... > >>The fault rate doubles when both patches are applied. > > ... > >>We are getting into an almost linear scalability in the high end with >>both patches and end up with a fault rate > 3 mio faults per second. > > > Well, with both patches you also slow single-threaded case more than > twice. What are the effects of this patch on UP system? fault/wsec is the important number. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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