== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:20:39 (1788837639)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6463 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-ffff8cec91521000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.38669
Iter 1/10: OSS cache speed: 0.435281
Iter 1/10: ladvise speed: 0.47451
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.39889
Iter 2/10: OSS cache speed: 0.435707
Iter 2/10: ladvise speed: 0.47408
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.404652
Iter 3/10: OSS cache speed: 0.51977
Iter 3/10: ladvise speed: 0.442041
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.39989
Iter 4/10: OSS cache speed: 0.426313
Iter 4/10: ladvise speed: 0.485341
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.43572
Iter 5/10: OSS cache speed: 0.474035
Iter 5/10: ladvise speed: 0.495359
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.433374
Iter 6/10: OSS cache speed: 0.487206
Iter 6/10: ladvise speed: 0.499772
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.382472
Iter 7/10: OSS cache speed: 0.432868
Iter 7/10: ladvise speed: 0.430639
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.437863
Iter 8/10: OSS cache speed: 0.4175
Iter 8/10: ladvise speed: 0.442226
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.391084
Iter 9/10: OSS cache speed: 0.427028
Iter 9/10: ladvise speed: 0.396941
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.429447
Iter 10/10: OSS cache speed: 0.457587
Iter 10/10: ladvise speed: 0.437741
Average uncached read: .41
Average speedup with OSS cached read:  .45 = +9%
Average speedup with ladvise willread:  .45 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0