== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:19:57 (1778840397)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.11226 s, 20.5 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-ffff9bb58630d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.25313
Iter 1/10: OSS cache speed: 2.50234
Iter 1/10: ladvise speed: 2.42637
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.2011
Iter 2/10: OSS cache speed: 2.39022
Iter 2/10: ladvise speed: 2.53785
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.19798
Iter 3/10: OSS cache speed: 2.32968
Iter 3/10: ladvise speed: 2.43268
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.16607
Iter 4/10: OSS cache speed: 2.42778
Iter 4/10: ladvise speed: 2.36056
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.25703
Iter 5/10: OSS cache speed: 2.43378
Iter 5/10: ladvise speed: 2.41582
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.22801
Iter 6/10: OSS cache speed: 2.36722
Iter 6/10: ladvise speed: 2.35175
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.68831
Iter 7/10: OSS cache speed: 2.07922
Iter 7/10: ladvise speed: 2.18834
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.05568
Iter 8/10: OSS cache speed: 2.34484
Iter 8/10: ladvise speed: 2.16606
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.49752
Iter 9/10: OSS cache speed: 1.86922
Iter 9/10: ladvise speed: 1.85189
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.12463
Iter 10/10: OSS cache speed: 2.46539
Iter 10/10: ladvise speed: 2.34792
Average uncached read: 2.06
Average speedup with OSS cached read:  2.32 = +12%
Average speedup with ladvise willread:  2.30 = +11%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0