Now to gain a good result, lets use 1G Huge Pages. Kernel cmdline: default_hugepagesz=1G hugepagesz=1G hugepages=1210
Gives: HugePages_Total: 1210 HugePages_Free: 1210 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 1048576 kB Guest config extra: <memoryBacking> <hugepages/> </memoryBacking> Slightly changed profile: Samples: 28K of event 'cycles:ppp', Event count (approx.): 19134377327 Overhead Shared Object Symbol 27.02% [kernel] [k] follow_hugetlb_page 11.23% [kernel] [k] __get_user_pages 9.10% [kernel] [k] _raw_spin_lock 7.58% [kernel] [k] down_read 7.53% [kernel] [k] up_read 6.14% [kernel] [k] huge_pte_offset T4: use 1.2 TB with one PT device, 1G sized explicit HugePages #1: 59 seconds #2: 21 seconds #3: 18 seconds This is what you'd expect from such a huge guest, and it works just as expected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1838575 Title: passthrough devices cause >17min boot delay To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1838575/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
