== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:52:40 (1790974360)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1687 s, 9.4 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-ffff8e4251c12000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.330153
Iter 1/10: OSS cache speed: 0.446843
Iter 1/10: ladvise speed: 0.447138
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.395414
Iter 2/10: OSS cache speed: 0.460618
Iter 2/10: ladvise speed: 0.330135
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.414291
Iter 3/10: OSS cache speed: 0.441623
Iter 3/10: ladvise speed: 0.364966
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368438
Iter 4/10: OSS cache speed: 0.470515
Iter 4/10: ladvise speed: 0.439173
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.336437
Iter 5/10: OSS cache speed: 0.357463
Iter 5/10: ladvise speed: 0.380283
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.404348
Iter 6/10: OSS cache speed: 0.431628
Iter 6/10: ladvise speed: 0.419631
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.363423
Iter 7/10: OSS cache speed: 0.377533
Iter 7/10: ladvise speed: 0.278615
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.268643
Iter 8/10: OSS cache speed: 0.332795
Iter 8/10: ladvise speed: 0.390324
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357535
Iter 9/10: OSS cache speed: 0.292075
Iter 9/10: ladvise speed: 0.312328
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364713
Iter 10/10: OSS cache speed: 0.351696
Iter 10/10: ladvise speed: 0.340695
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0