== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:46:55 (1764107215)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.95864 s, 15.1 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-ffff9b7be0b51000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.952203
Iter 1/10: OSS cache speed: 1.14224
Iter 1/10: ladvise speed: 1.74025
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.75905
Iter 2/10: OSS cache speed: 2.28476
Iter 2/10: ladvise speed: 2.39417
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.04995
Iter 3/10: OSS cache speed: 2.29806
Iter 3/10: ladvise speed: 0.810655
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.906722
Iter 4/10: OSS cache speed: 0.553354
Iter 4/10: ladvise speed: 0.65675
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409649
Iter 5/10: OSS cache speed: 0.527286
Iter 5/10: ladvise speed: 0.468805
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.498729
Iter 6/10: OSS cache speed: 0.561366
Iter 6/10: ladvise speed: 0.555456
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.527267
Iter 7/10: OSS cache speed: 0.578402
Iter 7/10: ladvise speed: 0.497986
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.453677
Iter 8/10: OSS cache speed: 0.53611
Iter 8/10: ladvise speed: 0.508153
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.455858
Iter 9/10: OSS cache speed: 0.530652
Iter 9/10: ladvise speed: 0.548237
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.331478
Iter 10/10: OSS cache speed: 0.52232
Iter 10/10: ladvise speed: 0.603582
Average uncached read: .83
Average speedup with OSS cached read:  .95 = +14%
Average speedup with ladvise willread:  .87 = +4%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0