== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:15:24 (1755040524)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.21207 s, 14.5 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-ffff9c7e21379800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.28164
Iter 1/10: OSS cache speed: 2.51991
Iter 1/10: ladvise speed: 2.51744
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.19867
Iter 2/10: OSS cache speed: 2.23967
Iter 2/10: ladvise speed: 2.01523
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.32082
Iter 3/10: OSS cache speed: 2.23567
Iter 3/10: ladvise speed: 2.27629
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.13354
Iter 4/10: OSS cache speed: 2.07433
Iter 4/10: ladvise speed: 2.47067
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.3353
Iter 5/10: OSS cache speed: 2.24946
Iter 5/10: ladvise speed: 1.9223
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.97783
Iter 6/10: OSS cache speed: 2.18654
Iter 6/10: ladvise speed: 2.39135
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.14653
Iter 7/10: OSS cache speed: 0.589159
Iter 7/10: ladvise speed: 0.275385
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.456235
Iter 8/10: OSS cache speed: 0.453075
Iter 8/10: ladvise speed: 0.450798
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.277899
Iter 9/10: OSS cache speed: 0.310505
Iter 9/10: ladvise speed: 0.324604
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.461602
Iter 10/10: OSS cache speed: 0.628728
Iter 10/10: ladvise speed: 0.646605
Average uncached read: 1.65
Average speedup with OSS cached read:  1.54 = +-6%
Average speedup with ladvise willread:  1.52 = +-7%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0