== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:27:23 (1786033643)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.781 s, 8.9 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-ffff951b8983a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.343856
Iter 1/10: OSS cache speed: 0.360362
Iter 1/10: ladvise speed: 0.392409
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.343483
Iter 2/10: OSS cache speed: 0.326138
Iter 2/10: ladvise speed: 0.385354
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.286884
Iter 3/10: OSS cache speed: 0.425017
Iter 3/10: ladvise speed: 0.354893
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.341961
Iter 4/10: OSS cache speed: 0.352977
Iter 4/10: ladvise speed: 0.344618
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.322095
Iter 5/10: OSS cache speed: 0.347284
Iter 5/10: ladvise speed: 0.352138
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.351365
Iter 6/10: OSS cache speed: 0.334293
Iter 6/10: ladvise speed: 0.30444
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368869
Iter 7/10: OSS cache speed: 0.353618
Iter 7/10: ladvise speed: 0.341893
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341515
Iter 8/10: OSS cache speed: 0.334071
Iter 8/10: ladvise speed: 0.34398
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.312103
Iter 9/10: OSS cache speed: 0.344864
Iter 9/10: ladvise speed: 0.337009
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.345252
Iter 10/10: OSS cache speed: 0.374482
Iter 10/10: ladvise speed: 0.355546
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0