== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:16:08 (1787469368)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.675 s, 6.7 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-ffff9c53c572a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.28627
Iter 1/10: OSS cache speed: 0.288313
Iter 1/10: ladvise speed: 0.292404
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.325456
Iter 2/10: OSS cache speed: 0.258573
Iter 2/10: ladvise speed: 0.246283
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.285312
Iter 3/10: OSS cache speed: 0.259961
Iter 3/10: ladvise speed: 0.299002
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.283316
Iter 4/10: OSS cache speed: 0.299198
Iter 4/10: ladvise speed: 0.292385
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.307053
Iter 5/10: OSS cache speed: 0.304817
Iter 5/10: ladvise speed: 0.267602
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.306989
Iter 6/10: OSS cache speed: 0.291306
Iter 6/10: ladvise speed: 0.267386
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.280173
Iter 7/10: OSS cache speed: 0.28976
Iter 7/10: ladvise speed: 0.2841
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.270634
Iter 8/10: OSS cache speed: 0.286165
Iter 8/10: ladvise speed: 0.2634
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.277766
Iter 9/10: OSS cache speed: 0.31536
Iter 9/10: ladvise speed: 0.300706
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.288727
Iter 10/10: OSS cache speed: 0.281163
Iter 10/10: ladvise speed: 0.289309
Average uncached read: .29
Average speedup with OSS cached read:  .28 = +-3%
Average speedup with ladvise willread:  .28 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0