== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:00:14 (1783951214)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8005 s, 8.9 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-ffff8da952b52800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.361326
Iter 1/10: OSS cache speed: 0.370444
Iter 1/10: ladvise speed: 0.324249
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.332085
Iter 2/10: OSS cache speed: 0.377936
Iter 2/10: ladvise speed: 0.404885
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.322476
Iter 3/10: OSS cache speed: 0.385904
Iter 3/10: ladvise speed: 0.331434
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.345349
Iter 4/10: OSS cache speed: 0.358421
Iter 4/10: ladvise speed: 0.36286
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.323557
Iter 5/10: OSS cache speed: 0.311991
Iter 5/10: ladvise speed: 0.342315
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.283226
Iter 6/10: OSS cache speed: 0.335759
Iter 6/10: ladvise speed: 0.345662
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.350945
Iter 7/10: OSS cache speed: 0.361638
Iter 7/10: ladvise speed: 0.355757
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.272838
Iter 8/10: OSS cache speed: 0.383219
Iter 8/10: ladvise speed: 0.350816
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.296405
Iter 9/10: OSS cache speed: 0.364147
Iter 9/10: ladvise speed: 0.345907
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.346033
Iter 10/10: OSS cache speed: 0.373367
Iter 10/10: ladvise speed: 0.395712
Average uncached read: .32
Average speedup with OSS cached read:  .36 = +12%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0