== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:50:19 (1787381419)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6126 s, 7.2 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9cbb88d26800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.284874
Iter 1/10: OSS cache speed: 0.32803
Iter 1/10: ladvise speed: 0.350048
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.369299
Iter 2/10: OSS cache speed: 0.373324
Iter 2/10: ladvise speed: 0.495932
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.333032
Iter 3/10: OSS cache speed: 0.484088
Iter 3/10: ladvise speed: 0.449716
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.408218
Iter 4/10: OSS cache speed: 0.475906
Iter 4/10: ladvise speed: 0.375173
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.448222
Iter 5/10: OSS cache speed: 0.442733
Iter 5/10: ladvise speed: 0.425658
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.412251
Iter 6/10: OSS cache speed: 0.462651
Iter 6/10: ladvise speed: 0.38697
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.376865
Iter 7/10: OSS cache speed: 0.46496
Iter 7/10: ladvise speed: 0.477486
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.444969
Iter 8/10: OSS cache speed: 0.359112
Iter 8/10: ladvise speed: 0.415936
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.460208
Iter 9/10: OSS cache speed: 0.493223
Iter 9/10: ladvise speed: 0.431209
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.469663
Iter 10/10: OSS cache speed: 0.443962
Iter 10/10: ladvise speed: 0.385427
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .41 = +2%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0