== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:15:07 (1788668107)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7455 s, 9.8 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-ffff923a98221000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.336057
Iter 1/10: OSS cache speed: 0.345178
Iter 1/10: ladvise speed: 0.301381
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.365087
Iter 2/10: OSS cache speed: 0.306837
Iter 2/10: ladvise speed: 0.353197
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.361109
Iter 3/10: OSS cache speed: 0.299339
Iter 3/10: ladvise speed: 0.319623
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.36196
Iter 4/10: OSS cache speed: 0.366755
Iter 4/10: ladvise speed: 0.352274
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.356701
Iter 5/10: OSS cache speed: 0.372676
Iter 5/10: ladvise speed: 0.364501
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.360679
Iter 6/10: OSS cache speed: 0.372731
Iter 6/10: ladvise speed: 0.392863
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.371071
Iter 7/10: OSS cache speed: 0.349272
Iter 7/10: ladvise speed: 0.362793
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.365449
Iter 8/10: OSS cache speed: 0.354661
Iter 8/10: ladvise speed: 0.375658
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.321361
Iter 9/10: OSS cache speed: 0.350415
Iter 9/10: ladvise speed: 0.328637
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.298617
Iter 10/10: OSS cache speed: 0.332462
Iter 10/10: ladvise speed: 0.354348
Average uncached read: .34
Average speedup with OSS cached read:  .34 = +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