> You said nothing about the system you are running this on. How many cores? Opteron 4226, six cores.
> What kind of disks? RAIDframe level 5 on five Samsung PM1643a 1,92TB SAS SSDs on a SAS9207-8i (mfii). Varying SpSU on the RAID (that's why I'm doing this in the first place). > Are they using MSI/MSIX to distribute interrupts to multiple CPUs? Oops, no. Neither on -8 nor on -10. > What file system and what mount options? FFS with quotas (newfs -O 2 -q user -q group), varying block sizes (see above). > Perhaps you should run your tests to extract to a tmpfs, to remove vagaries > from hardware from the experiment and to establish a baseline. Well, the original intent is to test various SpSU/fsbsize combinations on the test system before updating the NFS server with the SSDs. EF> The second question is what the single number without a backtrace means. CB> That is the number of time that the backtrace was sampled. An empty backtrace?
