== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:57:05 (1780329425)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.49785 s, 19.1 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-ffff9e9bc3e95000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.32714
Iter 1/10: OSS cache speed: 1.2782
Iter 1/10: ladvise speed: 1.73562
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.596517
Iter 2/10: OSS cache speed: 0.169419
Iter 2/10: ladvise speed: 0.354298
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.3661
Iter 3/10: OSS cache speed: 0.397369
Iter 3/10: ladvise speed: 0.282141
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.312811
Iter 4/10: OSS cache speed: 0.458655
Iter 4/10: ladvise speed: 0.563485
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.597672
Iter 5/10: OSS cache speed: 0.595302
Iter 5/10: ladvise speed: 1.31702
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.00204
Iter 6/10: OSS cache speed: 0.358735
Iter 6/10: ladvise speed: 0.254256
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.364523
Iter 7/10: OSS cache speed: 0.37387
Iter 7/10: ladvise speed: 0.347987
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341811
Iter 8/10: OSS cache speed: 0.358522
Iter 8/10: ladvise speed: 0.333529
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.335056
Iter 9/10: OSS cache speed: 0.362563
Iter 9/10: ladvise speed: 0.331157
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.328085
Iter 10/10: OSS cache speed: 0.325809
Iter 10/10: ladvise speed: 0.379463
Average uncached read: .55
Average speedup with OSS cached read:  .46 = +-16%
Average speedup with ladvise willread:  .58 = +5%
Speedup with OSS cached read less than 20%,  got -16%. Skipping ladvise willread check.
fail_loc=0