== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:17:12 (1764793032)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.001 s, 7.5 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-ffff9856490d1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.302428
Iter 1/10: OSS cache speed: 0.349365
Iter 1/10: ladvise speed: 0.944303
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.10063
Iter 2/10: OSS cache speed: 1.92276
Iter 2/10: ladvise speed: 2.22552
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.16084
Iter 3/10: OSS cache speed: 2.31109
Iter 3/10: ladvise speed: 2.40953
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.96758
Iter 4/10: OSS cache speed: 2.51147
Iter 4/10: ladvise speed: 2.38852
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.28711
Iter 5/10: OSS cache speed: 2.34733
Iter 5/10: ladvise speed: 2.36892
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.22035
Iter 6/10: OSS cache speed: 2.31728
Iter 6/10: ladvise speed: 2.37716
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.897239
Iter 7/10: OSS cache speed: 1.82318
Iter 7/10: ladvise speed: 0.627262
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.951177
Iter 8/10: OSS cache speed: 1.05166
Iter 8/10: ladvise speed: 2.16107
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.18292
Iter 9/10: OSS cache speed: 2.42061
Iter 9/10: ladvise speed: 0.767835
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.73253
Iter 10/10: OSS cache speed: 0.308734
Iter 10/10: ladvise speed: 0.472571
Average uncached read: 1.58
Average speedup with OSS cached read:  1.73 = +9%
Average speedup with ladvise willread:  1.67 = +5%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0