== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:36:33 (1786203393)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.80279 s, 18.1 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-ffff96394c381000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.03275
Iter 1/10: OSS cache speed: 1.1171
Iter 1/10: ladvise speed: 2.20568
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.3692
Iter 2/10: OSS cache speed: 1.18812
Iter 2/10: ladvise speed: 1.14696
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.04516
Iter 3/10: OSS cache speed: 1.1101
Iter 3/10: ladvise speed: 1.56354
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.30576
Iter 4/10: OSS cache speed: 2.5165
Iter 4/10: ladvise speed: 2.5102
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.59195
Iter 5/10: OSS cache speed: 1.38675
Iter 5/10: ladvise speed: 1.19326
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.999636
Iter 6/10: OSS cache speed: 1.32629
Iter 6/10: ladvise speed: 1.16815
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.03566
Iter 7/10: OSS cache speed: 1.97557
Iter 7/10: ladvise speed: 1.42634
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.03416
Iter 8/10: OSS cache speed: 1.24801
Iter 8/10: ladvise speed: 1.39286
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.40949
Iter 9/10: OSS cache speed: 1.14826
Iter 9/10: ladvise speed: 2.03919
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.90594
Iter 10/10: OSS cache speed: 0.328146
Iter 10/10: ladvise speed: 0.783238
Average uncached read: 1.37
Average speedup with OSS cached read:  1.33 = +-2%
Average speedup with ladvise willread:  1.54 = +12%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0