add sorted data to Histogram #197
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Thanks Feng. I'll iterate a bit more on this along the lines we spoke about. I think we can simplify a bit by assuming that once we begin asking q's of the data (mean, percentiles, etc.) we should always sort-and-seal, breaking the seal if more data is added (add/merge). I may also see about a single-sweep percentile gatherer in hopes of removing even more time. |
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Jun 13, 2024
* add sorted data to Historgram (#197) Co-authored-by: Feng Li <[email protected]> * multiple updates from msft internal 2.1.2 prerelease flush stdout to force XML/text results through prior to process exit fix issues identified by vs2019 build loop - 64->32 downcast, minor printf issues, _snprintf -> _snprintf_s timestamp prefixes for all verbose output dump specific time intervals for warmup/measured/cooldown to validate v. expected @ actual time of use/measurement only emit warmup/cooldown verbose output notes if there is nonzero warmup/cooldown specified in the profile minor cleanup of load thread verbose output so that everything has a consistent thread N: prefix histogram processing speedups, about 60% for XML (all percentiles) implicitly seal/sort histogram on first read operation, reset on subsequent inserts; save repeated re-sorting save histogram percentile iterator so that asecending percentile queries do not restart from lowest sample min/max in terms of begin/rbegin iterator show latency histogram bucket counts in XML results; potential work to moderate histogram size unit test coverage * DISKSPD 2.2 --------- Co-authored-by: FengLiMS <[email protected]> Co-authored-by: Feng Li <[email protected]> Co-authored-by: Dan Lovinger <[email protected]>
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add sorted data to Histogram to reduce time spend in creating latency histogram.
sample:
C:\test\diskspd.exe -L -b4k -o1024 -t4 -d1800 -Suw #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 #14 #15 #16 #17 #18 #19 #20 #21 #22
diskspd 2.1: 3493 seconds ( including 1800 sec test time) for a total 432982069 read, using max 22GB ram
with update:
diskspd new: 2432 seconds ( including 1800 sec test time) for a total 465295722 read, using max 12GB ram