== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:13:22 (1755638002)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.78052 s, 18.1 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-ffff931da0fea000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.05566
Iter 1/10: OSS cache speed: 2.01338
Iter 1/10: ladvise speed: 2.17897
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.20201
Iter 2/10: OSS cache speed: 2.21899
Iter 2/10: ladvise speed: 2.23645
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.19108
Iter 3/10: OSS cache speed: 2.20915
Iter 3/10: ladvise speed: 2.19282
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.17237
Iter 4/10: OSS cache speed: 1.83964
Iter 4/10: ladvise speed: 1.80457
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.73358
Iter 5/10: OSS cache speed: 1.87666
Iter 5/10: ladvise speed: 1.9384
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.7758
Iter 6/10: OSS cache speed: 1.85024
Iter 6/10: ladvise speed: 1.60548
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.71527
Iter 7/10: OSS cache speed: 1.33464
Iter 7/10: ladvise speed: 1.44852
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.76364
Iter 8/10: OSS cache speed: 1.4033
Iter 8/10: ladvise speed: 1.46579
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.44031
Iter 9/10: OSS cache speed: 1.20337
Iter 9/10: ladvise speed: 1.25331
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.12125
Iter 10/10: OSS cache speed: 1.17655
Iter 10/10: ladvise speed: 1.12463
Average uncached read: 1.81
Average speedup with OSS cached read:  1.71 = +-5%
Average speedup with ladvise willread:  1.72 = +-4%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0