== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:11:07 (1776870667)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.55378 s, 18.9 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-ffff9acb10ff6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.28389
Iter 1/10: OSS cache speed: 2.44465
Iter 1/10: ladvise speed: 2.32949
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.27341
Iter 2/10: OSS cache speed: 2.2551
Iter 2/10: ladvise speed: 2.45392
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.23821
Iter 3/10: OSS cache speed: 2.42382
Iter 3/10: ladvise speed: 2.43087
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.10408
Iter 4/10: OSS cache speed: 1.98419
Iter 4/10: ladvise speed: 2.15306
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15236
Iter 5/10: OSS cache speed: 2.28953
Iter 5/10: ladvise speed: 2.31669
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.2629
Iter 6/10: OSS cache speed: 2.51506
Iter 6/10: ladvise speed: 2.31351
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.15156
Iter 7/10: OSS cache speed: 2.37142
Iter 7/10: ladvise speed: 2.11423
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.07495
Iter 8/10: OSS cache speed: 2.04764
Iter 8/10: ladvise speed: 2.33907
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.99179
Iter 9/10: OSS cache speed: 2.15
Iter 9/10: ladvise speed: 1.79238
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.24876
Iter 10/10: OSS cache speed: 2.00501
Iter 10/10: ladvise speed: 1.16359
Average uncached read: 2.07
Average speedup with OSS cached read:  2.24 = +8%
Average speedup with ladvise willread:  2.14 = +3%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0