== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:59:01 (1746136741)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.24351 s, 24.7 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-ffff8800b6643800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.0223
Iter 1/10: OSS cache speed: 1.09776
Iter 1/10: ladvise speed: 1.12665
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.898512
Iter 2/10: OSS cache speed: 1.19607
Iter 2/10: ladvise speed: 1.10144
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.04269
Iter 3/10: OSS cache speed: 1.19492
Iter 3/10: ladvise speed: 1.26351
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.00754
Iter 4/10: OSS cache speed: 1.15442
Iter 4/10: ladvise speed: 1.19182
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.07621
Iter 5/10: OSS cache speed: 1.16396
Iter 5/10: ladvise speed: 1.24147
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.945204
Iter 6/10: OSS cache speed: 1.15021
Iter 6/10: ladvise speed: 1.22226
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.979977
Iter 7/10: OSS cache speed: 1.21897
Iter 7/10: ladvise speed: 1.19255
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.21166
Iter 8/10: OSS cache speed: 1.1156
Iter 8/10: ladvise speed: 1.20684
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.04903
Iter 9/10: OSS cache speed: 1.15309
Iter 9/10: ladvise speed: 1.18878
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.959688
Iter 10/10: OSS cache speed: 0.970271
Iter 10/10: ladvise speed: 1.02872
Average uncached read: 1.01
Average speedup with OSS cached read:  1.14 = +12%
Average speedup with ladvise willread:  1.17 = +15%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0