== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:27:12 (1732429632)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.138 s, 49.0 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-ffff8800b6cef800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.5856
Iter 1/10: OSS cache speed: 2.48445
Iter 1/10: ladvise speed: 1.32018
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.63296
Iter 2/10: OSS cache speed: 1.72927
Iter 2/10: ladvise speed: 1.62441
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.69638
Iter 3/10: OSS cache speed: 1.69403
Iter 3/10: ladvise speed: 1.51568
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.95305
Iter 4/10: OSS cache speed: 2.29166
Iter 4/10: ladvise speed: 1.82718
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.653283
Iter 5/10: OSS cache speed: 0.476637
Iter 5/10: ladvise speed: 0.510582
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.492571
Iter 6/10: OSS cache speed: 0.478914
Iter 6/10: ladvise speed: 0.485424
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.482076
Iter 7/10: OSS cache speed: 0.515001
Iter 7/10: ladvise speed: 0.494787
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.485049
Iter 8/10: OSS cache speed: 0.479611
Iter 8/10: ladvise speed: 0.479983
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.491737
Iter 9/10: OSS cache speed: 0.505405
Iter 9/10: ladvise speed: 0.485409
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.477824
Iter 10/10: OSS cache speed: 0.475112
Iter 10/10: ladvise speed: 0.476062
Average uncached read: 1.09
Average speedup with OSS cached read:  1.11 = +1%
Average speedup with ladvise willread:  .92 = +-15%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0