== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:34:06 (1741692846)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.31478 s, 45.3 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-ffff88012aae6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.76227
Iter 1/10: OSS cache speed: 1.41276
Iter 1/10: ladvise speed: 1.41138
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.60571
Iter 2/10: OSS cache speed: 1.39239
Iter 2/10: ladvise speed: 1.45394
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.55743
Iter 3/10: OSS cache speed: 2.0395
Iter 3/10: ladvise speed: 2.21388
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.09091
Iter 4/10: OSS cache speed: 2.78709
Iter 4/10: ladvise speed: 2.05727
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.92556
Iter 5/10: OSS cache speed: 2.88692
Iter 5/10: ladvise speed: 2.63024
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.01301
Iter 6/10: OSS cache speed: 1.97668
Iter 6/10: ladvise speed: 1.94418
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.40763
Iter 7/10: OSS cache speed: 1.84063
Iter 7/10: ladvise speed: 1.95876
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.47141
Iter 8/10: OSS cache speed: 2.45647
Iter 8/10: ladvise speed: 1.53593
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.03166
Iter 9/10: OSS cache speed: 2.12046
Iter 9/10: ladvise speed: 2.10116
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.44073
Iter 10/10: OSS cache speed: 1.81524
Iter 10/10: ladvise speed: 2.38585
Average uncached read: 2.23
Average speedup with OSS cached read:  2.07 = +-7%
Average speedup with ladvise willread:  1.96 = +-12%
Speedup with OSS cached read less than 20%,  got -7%. Skipping ladvise willread check.
fail_loc=0