== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:01:42 (1787745702)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.2726 s, 5.4 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-ffff9e56486b5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.259126
Iter 1/10: OSS cache speed: 0.281705
Iter 1/10: ladvise speed: 0.264599
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.332559
Iter 2/10: OSS cache speed: 0.352778
Iter 2/10: ladvise speed: 0.273994
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.32558
Iter 3/10: OSS cache speed: 0.298415
Iter 3/10: ladvise speed: 0.272124
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.295151
Iter 4/10: OSS cache speed: 0.309025
Iter 4/10: ladvise speed: 0.281462
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.327208
Iter 5/10: OSS cache speed: 0.257016
Iter 5/10: ladvise speed: 0.252175
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.354962
Iter 6/10: OSS cache speed: 0.332156
Iter 6/10: ladvise speed: 0.315254
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.32785
Iter 7/10: OSS cache speed: 0.309669
Iter 7/10: ladvise speed: 0.268788
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.31871
Iter 8/10: OSS cache speed: 0.305992
Iter 8/10: ladvise speed: 0.322853
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.309886
Iter 9/10: OSS cache speed: 0.298554
Iter 9/10: ladvise speed: 0.344722
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.343914
Iter 10/10: OSS cache speed: 0.346158
Iter 10/10: ladvise speed: 0.337413
Average uncached read: .31
Average speedup with OSS cached read:  .30 = +-3%
Average speedup with ladvise willread:  .29 = +-6%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0