== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:19:46 (1767035986)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.25784 s, 16.8 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-ffff948083843000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.16413
Iter 1/10: OSS cache speed: 2.20906
Iter 1/10: ladvise speed: 2.21264
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.3487
Iter 2/10: OSS cache speed: 2.38061
Iter 2/10: ladvise speed: 2.31704
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.2821
Iter 3/10: OSS cache speed: 2.08066
Iter 3/10: ladvise speed: 2.06538
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.91358
Iter 4/10: OSS cache speed: 2.31497
Iter 4/10: ladvise speed: 2.45754
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.20743
Iter 5/10: OSS cache speed: 2.70237
Iter 5/10: ladvise speed: 2.45857
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.32402
Iter 6/10: OSS cache speed: 2.53066
Iter 6/10: ladvise speed: 2.4478
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.30485
Iter 7/10: OSS cache speed: 2.51477
Iter 7/10: ladvise speed: 2.52346
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.30388
Iter 8/10: OSS cache speed: 2.50133
Iter 8/10: ladvise speed: 2.46933
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.18904
Iter 9/10: OSS cache speed: 2.41344
Iter 9/10: ladvise speed: 2.43926
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.29047
Iter 10/10: OSS cache speed: 2.04201
Iter 10/10: ladvise speed: 2.39844
Average uncached read: 2.23
Average speedup with OSS cached read:  2.36 = +5%
Average speedup with ladvise willread:  2.37 = +6%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0