== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:43:25 (1763336605)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.94156 s, 13.2 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-ffff9799cb0eb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.387242
Iter 1/10: OSS cache speed: 0.369701
Iter 1/10: ladvise speed: 0.395401
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.374687
Iter 2/10: OSS cache speed: 0.369011
Iter 2/10: ladvise speed: 0.358557
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.368683
Iter 3/10: OSS cache speed: 0.355108
Iter 3/10: ladvise speed: 0.386951
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.370241
Iter 4/10: OSS cache speed: 0.354418
Iter 4/10: ladvise speed: 0.343408
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.35771
Iter 5/10: OSS cache speed: 0.359365
Iter 5/10: ladvise speed: 0.349896
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375136
Iter 6/10: OSS cache speed: 0.382648
Iter 6/10: ladvise speed: 0.369749
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.361516
Iter 7/10: OSS cache speed: 0.342299
Iter 7/10: ladvise speed: 0.364317
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.337457
Iter 8/10: OSS cache speed: 0.354555
Iter 8/10: ladvise speed: 0.367002
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330323
Iter 9/10: OSS cache speed: 0.348478
Iter 9/10: ladvise speed: 0.33581
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364209
Iter 10/10: OSS cache speed: 0.364387
Iter 10/10: ladvise speed: 0.355414
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-2%
Average speedup with ladvise willread:  .36 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0