On Mon, Jun 09, 2025 at 06:36:07PM -0400, Peter Xu wrote: > Add the latency distribution too for blocktime, using order-of-two buckets. > It accounts for all the faults, from either vCPU or non-vCPU threads. With > prior rework, it's very easy to achieve by adding an array to account for > faults in each buckets. > > Sample output for HMP (while for QMP it's simply an array): > > Postcopy Latency Distribution: > [ 1 us - 2 us ]: 0 > [ 2 us - 4 us ]: 0 > [ 4 us - 8 us ]: 1 > [ 8 us - 16 us ]: 2 > [ 16 us - 32 us ]: 2 > [ 32 us - 64 us ]: 3 > [ 64 us - 128 us ]: 10169 > [ 128 us - 256 us ]: 50151 > [ 256 us - 512 us ]: 12876 > [ 512 us - 1 ms ]: 97 > [ 1 ms - 2 ms ]: 42 > [ 2 ms - 4 ms ]: 44 > [ 4 ms - 8 ms ]: 93 > [ 8 ms - 16 ms ]: 138 > [ 16 ms - 32 ms ]: 0 > [ 32 ms - 65 ms ]: 0 > [ 65 ms - 131 ms ]: 0 > [ 131 ms - 262 ms ]: 0 > [ 262 ms - 524 ms ]: 0 > [ 524 ms - 1 sec ]: 0 > [ 1 sec - 2 sec ]: 0 > [ 2 sec - 4 sec ]: 0 > [ 4 sec - 8 sec ]: 0 > [ 8 sec - 16 sec ]: 0 > > Cc: Dr. David Alan Gilbert <d...@treblig.org> > Cc: Markus Armbruster <arm...@redhat.com> > Signed-off-by: Peter Xu <pet...@redhat.com>
Just to keep a record, the new version of this patch is included here: https://lore.kernel.org/all/20250613141217.474825-15-pet...@redhat.com/ There're trivial changes there, on marking the feature unstable, meanwhile adjustments to suite the us->ns conversion suggested by Dave. -- Peter Xu
