== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:10:57 (1786828257)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0131 s, 10.5 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-ffff99bd194b6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.374831
Iter 1/10: OSS cache speed: 0.377847
Iter 1/10: ladvise speed: 0.417142
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.386001
Iter 2/10: OSS cache speed: 0.385997
Iter 2/10: ladvise speed: 0.410418
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.40145
Iter 3/10: OSS cache speed: 0.379658
Iter 3/10: ladvise speed: 0.427677
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384545
Iter 4/10: OSS cache speed: 0.382831
Iter 4/10: ladvise speed: 0.355666
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.358859
Iter 5/10: OSS cache speed: 0.381436
Iter 5/10: ladvise speed: 0.39223
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.385915
Iter 6/10: OSS cache speed: 0.381249
Iter 6/10: ladvise speed: 0.378129
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.409511
Iter 7/10: OSS cache speed: 0.407474
Iter 7/10: ladvise speed: 0.450474
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.462839
Iter 8/10: OSS cache speed: 0.399764
Iter 8/10: ladvise speed: 0.36421
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.39033
Iter 9/10: OSS cache speed: 0.378541
Iter 9/10: ladvise speed: 0.43445
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.400569
Iter 10/10: OSS cache speed: 0.419266
Iter 10/10: ladvise speed: 0.366048
Average uncached read: .39
Average speedup with OSS cached read:  .38 = +-2%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0