== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:22:22 (1778840542)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 4.81042 s, 21.8 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-ffff9a3f510cf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.06069
Iter 1/10: OSS cache speed: 2.01749
Iter 1/10: ladvise speed: 2.22527
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.27943
Iter 2/10: OSS cache speed: 2.05847
Iter 2/10: ladvise speed: 1.99065
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.11022
Iter 3/10: OSS cache speed: 2.07422
Iter 3/10: ladvise speed: 2.11204
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.15715
Iter 4/10: OSS cache speed: 2.13202
Iter 4/10: ladvise speed: 2.13733
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.08694
Iter 5/10: OSS cache speed: 2.13496
Iter 5/10: ladvise speed: 1.7293
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.84596
Iter 6/10: OSS cache speed: 2.03481
Iter 6/10: ladvise speed: 2.0775
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.18164
Iter 7/10: OSS cache speed: 1.84766
Iter 7/10: ladvise speed: 1.57378
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.75446
Iter 8/10: OSS cache speed: 1.8826
Iter 8/10: ladvise speed: 2.21863
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.17944
Iter 9/10: OSS cache speed: 2.05289
Iter 9/10: ladvise speed: 2.10854
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.85808
Iter 10/10: OSS cache speed: 1.82653
Iter 10/10: ladvise speed: 1.78782
Average uncached read: 2.05
Average speedup with OSS cached read:  2.00 = +-2%
Average speedup with ladvise willread:  1.99 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0