== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:16:48 (1753427808)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.90648 s, 17.8 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-ffff9b9a4847d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.69638
Iter 1/10: OSS cache speed: 2.05498
Iter 1/10: ladvise speed: 1.87455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.03475
Iter 2/10: OSS cache speed: 2.05127
Iter 2/10: ladvise speed: 2.12376
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.15105
Iter 3/10: OSS cache speed: 2.31114
Iter 3/10: ladvise speed: 2.04663
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.27104
Iter 4/10: OSS cache speed: 2.29699
Iter 4/10: ladvise speed: 2.09537
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.03976
Iter 5/10: OSS cache speed: 2.01491
Iter 5/10: ladvise speed: 2.12567
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.06874
Iter 6/10: OSS cache speed: 2.09027
Iter 6/10: ladvise speed: 2.15469
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.10229
Iter 7/10: OSS cache speed: 2.0989
Iter 7/10: ladvise speed: 2.15121
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.44983
Iter 8/10: OSS cache speed: 1.08318
Iter 8/10: ladvise speed: 1.72831
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.81581
Iter 9/10: OSS cache speed: 0.997881
Iter 9/10: ladvise speed: 2.08776
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.21834
Iter 10/10: OSS cache speed: 2.39295
Iter 10/10: ladvise speed: 2.12409
Average uncached read: 1.98
Average speedup with OSS cached read:  1.93 = +-2%
Average speedup with ladvise willread:  2.05 = +3%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0