== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:31:55 (1790692315)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1122 s, 8.7 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-ffff89ce08616000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.421417
Iter 1/10: OSS cache speed: 0.502299
Iter 1/10: ladvise speed: 0.420324
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.446785
Iter 2/10: OSS cache speed: 0.404452
Iter 2/10: ladvise speed: 0.479824
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.347981
Iter 3/10: OSS cache speed: 0.445313
Iter 3/10: ladvise speed: 0.461351
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.39333
Iter 4/10: OSS cache speed: 0.460365
Iter 4/10: ladvise speed: 0.469091
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.482978
Iter 5/10: OSS cache speed: 0.473227
Iter 5/10: ladvise speed: 0.573184
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.491471
Iter 6/10: OSS cache speed: 0.534294
Iter 6/10: ladvise speed: 0.388326
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380127
Iter 7/10: OSS cache speed: 0.440044
Iter 7/10: ladvise speed: 0.531126
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.478027
Iter 8/10: OSS cache speed: 0.459002
Iter 8/10: ladvise speed: 0.508334
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.491512
Iter 9/10: OSS cache speed: 0.512778
Iter 9/10: ladvise speed: 0.444269
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.521339
Iter 10/10: OSS cache speed: 0.538806
Iter 10/10: ladvise speed: 0.436395
Average uncached read: .44
Average speedup with OSS cached read:  .47 = +6%
Average speedup with ladvise willread:  .47 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0