== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:21:28 (1745457688)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.7787 s, 37.7 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-72b03595-9237-4edf-b98c-f3787e802ddd.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.69597
Iter 1/10: OSS cache speed: 2.5665
Iter 1/10: ladvise speed: 2.43974
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.78955
Iter 2/10: OSS cache speed: 2.72912
Iter 2/10: ladvise speed: 2.76483
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.71391
Iter 3/10: OSS cache speed: 2.66002
Iter 3/10: ladvise speed: 2.77658
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.69398
Iter 4/10: OSS cache speed: 2.68551
Iter 4/10: ladvise speed: 2.60742
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.72488
Iter 5/10: OSS cache speed: 2.74798
Iter 5/10: ladvise speed: 2.50068
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.48788
Iter 6/10: OSS cache speed: 2.45151
Iter 6/10: ladvise speed: 2.78708
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.65485
Iter 7/10: OSS cache speed: 2.28685
Iter 7/10: ladvise speed: 2.67643
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.76109
Iter 8/10: OSS cache speed: 2.39768
Iter 8/10: ladvise speed: 2.20532
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.73417
Iter 9/10: OSS cache speed: 2.30903
Iter 9/10: ladvise speed: 2.38499
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.20105
Iter 10/10: OSS cache speed: 2.39908
Iter 10/10: ladvise speed: 2.21123
Average uncached read: 2.64
Average speedup with OSS cached read:  2.52 = +-4%
Average speedup with ladvise willread:  2.53 = +-4%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0