On 11/29/2017 07:16 PM, Jens Axboe wrote: > On 11/29/2017 06:37 PM, Jens Axboe wrote: >> On 11/29/2017 01:58 PM, Jens Axboe wrote: >>> I'll take a look at adding absolute zoning, should be pretty >>> trivial. >> >> Quick and dirty here, can you see if this works with your magic >> script? >> >> Basically you just do: >> >> random_distribution=zoned_abs:60/100m:10/200m:30/700m >> >> like you would for 'zoned' - the first is a percentage, the >> other part is a size. So the above would be: >> >> - 60% of accesss to the first 100M >> - 10% of access to the next 200M >> - 30% of access to the next 700m >> >> No checking for whether or not we exceed device/file size or anything >> like that in this version, but everything else should work with the >> existing code pretty nicely. Not tested... > > Added documentation, and modified your script do have: > > dist_str = "zoned_abs:50/35770m:10/286166m:40/35770m" > > for a 375G nvme drive I have, this yields: > > histogram percents = [25.011592135525543, 25.014596077621864, 0.6177337336535484, 0.6206606515935528, 0.6198133858740779, 0.6175796853409167, 0.6187350476856551, 0.6266685357861933, 0.6370667968888403, 0.6393004974220015, 0.6279009222872477, 0.6302886711330408, 0.6230484004393458, 0.6274387773493523, 0.6131122842745942, 0.6258982942230342, 0.614036574150385, 0.6185809993730234, 19.971208370369116, 20.02474015900867] > histogram edges = [36629084.0, 73258168.0, 109887252.0, 146516336.0, 183145420.0, 219774504.0, 256403588.0, 293032672.0, 329661756.0, 366290840.0, 402919924.0, 439549008.0, 476178092.0, 512807176.0, 549436260.0, 586065344.0, 622694428.0, 659323512.0, 695952596.0, 732581680.0] > zoned_abs:50/35770m:10/286166m:40/35770m > > which looks correct to me - 50% in the first two buckets, which is defined as > the first 10% of the drive. 40% in the last two buckets, which is the last 10% > of the drive. And the rest in the middle, which should add up to 10 (quick > eyeballing says it does). > > Updated patch below. Only change is the added documentation, and a check > for exceeding device/file size. Did some basic testing, and it seems fine to me. I've committed it, so may be easier for you to just git update and run with that. Do let me know when you test it and what your findings are, so we can ensure that it works the way it should for all cases. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
