== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:52:56 (1763877176)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.25908 s, 16.8 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-ffff977583ef8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.08967
Iter 1/10: OSS cache speed: 2.39473
Iter 1/10: ladvise speed: 2.40198
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.17559
Iter 2/10: OSS cache speed: 2.32893
Iter 2/10: ladvise speed: 2.38961
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.18238
Iter 3/10: OSS cache speed: 2.36058
Iter 3/10: ladvise speed: 2.41586
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.16545
Iter 4/10: OSS cache speed: 2.42113
Iter 4/10: ladvise speed: 2.50466
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.2508
Iter 5/10: OSS cache speed: 2.44862
Iter 5/10: ladvise speed: 2.49506
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.13732
Iter 6/10: OSS cache speed: 2.056
Iter 6/10: ladvise speed: 2.04092
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.07372
Iter 7/10: OSS cache speed: 2.21123
Iter 7/10: ladvise speed: 2.43714
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.20427
Iter 8/10: OSS cache speed: 2.34962
Iter 8/10: ladvise speed: 2.36292
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.23362
Iter 9/10: OSS cache speed: 1.93745
Iter 9/10: ladvise speed: 2.03086
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.24869
Iter 10/10: OSS cache speed: 2.48642
Iter 10/10: ladvise speed: 2.50757
Average uncached read: 2.17
Average speedup with OSS cached read:  2.29 = +5%
Average speedup with ladvise willread:  2.35 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0