== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:15:52 (1786943752)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.58633 s, 10.9 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-ffff89154b21b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.521516
Iter 1/10: OSS cache speed: 0.528102
Iter 1/10: ladvise speed: 0.542906
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.532266
Iter 2/10: OSS cache speed: 0.557546
Iter 2/10: ladvise speed: 0.52551
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.578414
Iter 3/10: OSS cache speed: 0.564153
Iter 3/10: ladvise speed: 0.581263
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368844
Iter 4/10: OSS cache speed: 0.347522
Iter 4/10: ladvise speed: 0.42318
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.452119
Iter 5/10: OSS cache speed: 0.443547
Iter 5/10: ladvise speed: 0.419156
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.470224
Iter 6/10: OSS cache speed: 0.553233
Iter 6/10: ladvise speed: 0.561493
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.581441
Iter 7/10: OSS cache speed: 0.581849
Iter 7/10: ladvise speed: 0.57928
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.561052
Iter 8/10: OSS cache speed: 0.612497
Iter 8/10: ladvise speed: 0.589278
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.636941
Iter 9/10: OSS cache speed: 0.58606
Iter 9/10: ladvise speed: 0.327843
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.305658
Iter 10/10: OSS cache speed: 0.423414
Iter 10/10: ladvise speed: 0.353461
Average uncached read: .50
Average speedup with OSS cached read:  .51 = +2%
Average speedup with ladvise willread:  .49 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0