== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:45:00 (1781275500)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4603 s, 7.8 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-ffff940f42be6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.378809
Iter 1/10: OSS cache speed: 0.411036
Iter 1/10: ladvise speed: 0.456608
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.411644
Iter 2/10: OSS cache speed: 0.469699
Iter 2/10: ladvise speed: 0.443955
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.394741
Iter 3/10: OSS cache speed: 0.445903
Iter 3/10: ladvise speed: 0.498874
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.400132
Iter 4/10: OSS cache speed: 0.401161
Iter 4/10: ladvise speed: 0.478974
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.340495
Iter 5/10: OSS cache speed: 0.385053
Iter 5/10: ladvise speed: 0.442287
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.443039
Iter 6/10: OSS cache speed: 0.470713
Iter 6/10: ladvise speed: 0.45502
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.409048
Iter 7/10: OSS cache speed: 0.45308
Iter 7/10: ladvise speed: 0.47026
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.360831
Iter 8/10: OSS cache speed: 0.422214
Iter 8/10: ladvise speed: 0.453709
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365085
Iter 9/10: OSS cache speed: 0.39495
Iter 9/10: ladvise speed: 0.3168
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.349012
Iter 10/10: OSS cache speed: 0.373323
Iter 10/10: ladvise speed: 0.384161
Average uncached read: .38
Average speedup with OSS cached read:  .42 = +10%
Average speedup with ladvise willread:  .44 = +15%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0