== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:03:38 (1787828618)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5025 s, 9.1 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-ffff9d83c51bb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37755
Iter 1/10: OSS cache speed: 0.363495
Iter 1/10: ladvise speed: 0.400999
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.399105
Iter 2/10: OSS cache speed: 0.399726
Iter 2/10: ladvise speed: 0.356258
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.322377
Iter 3/10: OSS cache speed: 0.370041
Iter 3/10: ladvise speed: 0.398367
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342591
Iter 4/10: OSS cache speed: 0.384319
Iter 4/10: ladvise speed: 0.338982
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.364937
Iter 5/10: OSS cache speed: 0.347652
Iter 5/10: ladvise speed: 0.328936
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.348805
Iter 6/10: OSS cache speed: 0.333541
Iter 6/10: ladvise speed: 0.378713
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.423874
Iter 7/10: OSS cache speed: 0.394623
Iter 7/10: ladvise speed: 0.357863
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.303246
Iter 8/10: OSS cache speed: 0.361341
Iter 8/10: ladvise speed: 0.35173
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333553
Iter 9/10: OSS cache speed: 0.306399
Iter 9/10: ladvise speed: 0.379576
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.401126
Iter 10/10: OSS cache speed: 0.368526
Iter 10/10: ladvise speed: 0.299173
Average uncached read: .36
Average speedup with OSS cached read:  .36 = +0%
Average speedup with ladvise willread:  .35 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0