== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:18:58 (1775873938)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.66405 s, 12.1 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-ffff895ed0d4c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.431688
Iter 1/10: OSS cache speed: 0.482256
Iter 1/10: ladvise speed: 0.476138
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.554309
Iter 2/10: OSS cache speed: 0.518072
Iter 2/10: ladvise speed: 0.539721
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.508181
Iter 3/10: OSS cache speed: 0.507642
Iter 3/10: ladvise speed: 0.499696
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.499656
Iter 4/10: OSS cache speed: 0.478926
Iter 4/10: ladvise speed: 0.50819
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.508338
Iter 5/10: OSS cache speed: 0.557995
Iter 5/10: ladvise speed: 0.5445
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.601168
Iter 6/10: OSS cache speed: 0.529876
Iter 6/10: ladvise speed: 0.597835
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.606413
Iter 7/10: OSS cache speed: 0.611301
Iter 7/10: ladvise speed: 0.587118
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.571057
Iter 8/10: OSS cache speed: 0.601789
Iter 8/10: ladvise speed: 0.616503
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.59833
Iter 9/10: OSS cache speed: 0.631102
Iter 9/10: ladvise speed: 0.625138
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.585809
Iter 10/10: OSS cache speed: 0.614265
Iter 10/10: ladvise speed: 0.597403
Average uncached read: .54
Average speedup with OSS cached read:  .55 = +1%
Average speedup with ladvise willread:  .55 = +1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0