== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:24:18 (1777911858)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.47488 s, 16.2 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-ffff95e903afc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.5832
Iter 1/10: OSS cache speed: 1.6958
Iter 1/10: ladvise speed: 2.0258
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.08452
Iter 2/10: OSS cache speed: 2.25371
Iter 2/10: ladvise speed: 2.57307
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.21017
Iter 3/10: OSS cache speed: 2.55623
Iter 3/10: ladvise speed: 2.45436
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.3117
Iter 4/10: OSS cache speed: 2.31722
Iter 4/10: ladvise speed: 2.56772
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.18858
Iter 5/10: OSS cache speed: 2.50647
Iter 5/10: ladvise speed: 2.71195
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.40341
Iter 6/10: OSS cache speed: 2.59546
Iter 6/10: ladvise speed: 2.5831
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.31295
Iter 7/10: OSS cache speed: 2.42295
Iter 7/10: ladvise speed: 2.43389
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.17743
Iter 8/10: OSS cache speed: 2.67208
Iter 8/10: ladvise speed: 2.79188
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.20468
Iter 9/10: OSS cache speed: 2.53872
Iter 9/10: ladvise speed: 2.42384
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.43931
Iter 10/10: OSS cache speed: 2.70227
Iter 10/10: ladvise speed: 2.59251
Average uncached read: 2.19
Average speedup with OSS cached read:  2.42 = +10%
Average speedup with ladvise willread:  2.51 = +14%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0