== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:18:07 (1787577487)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.5299 s, 8.4 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-ffff900244d51000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.379454
Iter 1/10: OSS cache speed: 0.37819
Iter 1/10: ladvise speed: 0.379796
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.401198
Iter 2/10: OSS cache speed: 0.348081
Iter 2/10: ladvise speed: 0.380703
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.342932
Iter 3/10: OSS cache speed: 0.405426
Iter 3/10: ladvise speed: 0.348667
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.341309
Iter 4/10: OSS cache speed: 0.302243
Iter 4/10: ladvise speed: 0.338473
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.364063
Iter 5/10: OSS cache speed: 0.277407
Iter 5/10: ladvise speed: 0.347782
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.331312
Iter 6/10: OSS cache speed: 0.309372
Iter 6/10: ladvise speed: 0.326148
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.359219
Iter 7/10: OSS cache speed: 0.347643
Iter 7/10: ladvise speed: 0.339856
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.296749
Iter 8/10: OSS cache speed: 0.344354
Iter 8/10: ladvise speed: 0.337851
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.354391
Iter 9/10: OSS cache speed: 0.444893
Iter 9/10: ladvise speed: 0.364236
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.357735
Iter 10/10: OSS cache speed: 0.422167
Iter 10/10: ladvise speed: 0.325047
Average uncached read: .35
Average speedup with OSS cached read:  .35 = +0%
Average speedup with ladvise willread:  .34 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0