== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:26:50 (1734672410)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.68849 s, 28.4 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-ffff8800b364e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.814598
Iter 1/10: OSS cache speed: 1.08791
Iter 1/10: ladvise speed: 0.964511
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.860833
Iter 2/10: OSS cache speed: 0.934923
Iter 2/10: ladvise speed: 1.00776
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.913878
Iter 3/10: OSS cache speed: 1.10299
Iter 3/10: ladvise speed: 1.08165
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.986973
Iter 4/10: OSS cache speed: 1.02761
Iter 4/10: ladvise speed: 1.10771
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.843997
Iter 5/10: OSS cache speed: 0.941153
Iter 5/10: ladvise speed: 1.08911
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.06663
Iter 6/10: OSS cache speed: 1.14206
Iter 6/10: ladvise speed: 1.18293
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.0857
Iter 7/10: OSS cache speed: 1.36705
Iter 7/10: ladvise speed: 1.4425
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.22446
Iter 8/10: OSS cache speed: 1.26167
Iter 8/10: ladvise speed: 1.19821
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.03675
Iter 9/10: OSS cache speed: 1.12543
Iter 9/10: ladvise speed: 0.951165
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.856875
Iter 10/10: OSS cache speed: 1.07401
Iter 10/10: ladvise speed: 1.05086
Average uncached read: .96
Average speedup with OSS cached read:  1.10 = +14%
Average speedup with ladvise willread:  1.10 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0