== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:22:36 (1735100556)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.93336 s, 35.7 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-ffff8800b0a5c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.57227
Iter 1/10: OSS cache speed: 2.44399
Iter 1/10: ladvise speed: 2.42482
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.23645
Iter 2/10: OSS cache speed: 2.3761
Iter 2/10: ladvise speed: 2.41933
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.46367
Iter 3/10: OSS cache speed: 2.55094
Iter 3/10: ladvise speed: 2.45556
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.4404
Iter 4/10: OSS cache speed: 2.48021
Iter 4/10: ladvise speed: 1.64105
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.40501
Iter 5/10: OSS cache speed: 2.2837
Iter 5/10: ladvise speed: 2.40427
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.38492
Iter 6/10: OSS cache speed: 2.33248
Iter 6/10: ladvise speed: 2.28118
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.24344
Iter 7/10: OSS cache speed: 2.27965
Iter 7/10: ladvise speed: 1.8066
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.21563
Iter 8/10: OSS cache speed: 2.30197
Iter 8/10: ladvise speed: 2.77514
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.44447
Iter 9/10: OSS cache speed: 2.28289
Iter 9/10: ladvise speed: 2.53372
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.66928
Iter 10/10: OSS cache speed: 2.61638
Iter 10/10: ladvise speed: 2.46299
Average uncached read: 2.40
Average speedup with OSS cached read:  2.39 = +0%
Average speedup with ladvise willread:  2.32 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0