== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:14:05 (1786115645)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.14223 s, 17.1 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-ffff8b154bdd6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.13721
Iter 1/10: OSS cache speed: 1.20658
Iter 1/10: ladvise speed: 1.47867
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.65952
Iter 2/10: OSS cache speed: 1.66549
Iter 2/10: ladvise speed: 1.41308
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.59368
Iter 3/10: OSS cache speed: 1.74405
Iter 3/10: ladvise speed: 1.93236
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.84641
Iter 4/10: OSS cache speed: 2.09792
Iter 4/10: ladvise speed: 2.07764
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15125
Iter 5/10: OSS cache speed: 2.21085
Iter 5/10: ladvise speed: 2.13276
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.10478
Iter 6/10: OSS cache speed: 2.17688
Iter 6/10: ladvise speed: 2.02724
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.1902
Iter 7/10: OSS cache speed: 2.32737
Iter 7/10: ladvise speed: 2.01583
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.09227
Iter 8/10: OSS cache speed: 2.14649
Iter 8/10: ladvise speed: 2.0491
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.11468
Iter 9/10: OSS cache speed: 2.1553
Iter 9/10: ladvise speed: 2.08113
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.0794
Iter 10/10: OSS cache speed: 1.90792
Iter 10/10: ladvise speed: 1.81465
Average uncached read: 1.89
Average speedup with OSS cached read:  1.96 = +3%
Average speedup with ladvise willread:  1.90 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0