== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:34:24 (1747848864)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.13541 s, 33.4 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-ffff88012abc9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2482
Iter 1/10: OSS cache speed: 2.25046
Iter 1/10: ladvise speed: 2.54924
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.60844
Iter 2/10: OSS cache speed: 2.3405
Iter 2/10: ladvise speed: 2.536
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.008
Iter 3/10: OSS cache speed: 2.20993
Iter 3/10: ladvise speed: 2.64247
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.87748
Iter 4/10: OSS cache speed: 3.3061
Iter 4/10: ladvise speed: 3.16398
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.20798
Iter 5/10: OSS cache speed: 3.39622
Iter 5/10: ladvise speed: 3.36418
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.7527
Iter 6/10: OSS cache speed: 3.17231
Iter 6/10: ladvise speed: 3.25319
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.12618
Iter 7/10: OSS cache speed: 3.16412
Iter 7/10: ladvise speed: 3.32922
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.76729
Iter 8/10: OSS cache speed: 3.01905
Iter 8/10: ladvise speed: 3.16437
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.8883
Iter 9/10: OSS cache speed: 3.08024
Iter 9/10: ladvise speed: 3.00401
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.69458
Iter 10/10: OSS cache speed: 3.02099
Iter 10/10: ladvise speed: 3.0418
Average uncached read: 2.71
Average speedup with OSS cached read:  2.89 = +6%
Average speedup with ladvise willread:  3.00 = +10%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0