== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:55:48 (1731750948)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.77433 s, 37.8 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-ffff880130e7d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.90775
Iter 1/10: OSS cache speed: 3.50216
Iter 1/10: ladvise speed: 2.97641
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.66917
Iter 2/10: OSS cache speed: 3.15175
Iter 2/10: ladvise speed: 3.16395
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.96435
Iter 3/10: OSS cache speed: 3.2709
Iter 3/10: ladvise speed: 3.22507
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.88799
Iter 4/10: OSS cache speed: 3.19502
Iter 4/10: ladvise speed: 3.24218
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.06553
Iter 5/10: OSS cache speed: 2.97401
Iter 5/10: ladvise speed: 3.3183
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.88841
Iter 6/10: OSS cache speed: 3.27425
Iter 6/10: ladvise speed: 3.33248
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.68813
Iter 7/10: OSS cache speed: 3.07622
Iter 7/10: ladvise speed: 2.96023
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 3.06411
Iter 8/10: OSS cache speed: 3.35851
Iter 8/10: ladvise speed: 3.30088
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 3.04065
Iter 9/10: OSS cache speed: 3.3113
Iter 9/10: ladvise speed: 3.13863
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.67683
Iter 10/10: OSS cache speed: 3.13971
Iter 10/10: ladvise speed: 3.24462
Average uncached read: 2.88
Average speedup with OSS cached read:  3.22 = +11%
Average speedup with ladvise willread:  3.19 = +10%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0