== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:49:41 (1756676981)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.74932 s, 18.2 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-ffff973a47cf8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.26799
Iter 1/10: OSS cache speed: 2.31701
Iter 1/10: ladvise speed: 2.21224
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.82639
Iter 2/10: OSS cache speed: 2.07886
Iter 2/10: ladvise speed: 2.26369
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.08803
Iter 3/10: OSS cache speed: 2.07495
Iter 3/10: ladvise speed: 2.1187
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.21873
Iter 4/10: OSS cache speed: 2.22792
Iter 4/10: ladvise speed: 2.00332
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.03033
Iter 5/10: OSS cache speed: 2.13481
Iter 5/10: ladvise speed: 2.11192
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.23496
Iter 6/10: OSS cache speed: 2.25196
Iter 6/10: ladvise speed: 2.3255
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.33661
Iter 7/10: OSS cache speed: 2.36097
Iter 7/10: ladvise speed: 2.22316
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.90239
Iter 8/10: OSS cache speed: 2.32034
Iter 8/10: ladvise speed: 2.33715
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.35553
Iter 9/10: OSS cache speed: 2.3906
Iter 9/10: ladvise speed: 2.27807
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.8949
Iter 10/10: OSS cache speed: 2.36381
Iter 10/10: ladvise speed: 2.36501
Average uncached read: 2.11
Average speedup with OSS cached read:  2.25 = +6%
Average speedup with ladvise willread:  2.22 = +5%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0