bc00666271
Currently, each histogram range is hardcoded to 128 buckets (1ULL << 7), resulting in 58 ranges (64 - 7 + 1) and a total size of 58 * 128 * sizeof(uint64_t) = 59392 bytes. To allow for more usage models in cases where this size is prohibitive, enable the following changes: 1) specify number of buckets per range (in number of bits) 2) specify max datapoint value (in number of bits) The latter can be useful for cases where datapoints are never close to requiring all 64 bits - and allows reducing the number of ranges. Any data points that exceed the max will be tallied in the last bucket in the last range. Testing shows no performance disadvantage using the dynamic approach. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I5979bcdff6209faaa9dee293918ef2a78679bcd4 Reviewed-on: https://review.gerrithub.io/392707 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> |
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