== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:23:09 (1746127389)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.80067 s, 27.6 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-ffff8800adbf6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.828843
Iter 1/10: OSS cache speed: 0.893491
Iter 1/10: ladvise speed: 0.836355
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.859638
Iter 2/10: OSS cache speed: 0.871576
Iter 2/10: ladvise speed: 0.892
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.857462
Iter 3/10: OSS cache speed: 0.840202
Iter 3/10: ladvise speed: 0.84976
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.794772
Iter 4/10: OSS cache speed: 0.76054
Iter 4/10: ladvise speed: 0.888374
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.01789
Iter 5/10: OSS cache speed: 0.868503
Iter 5/10: ladvise speed: 0.749423
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.651003
Iter 6/10: OSS cache speed: 0.667965
Iter 6/10: ladvise speed: 0.512238
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.549148
Iter 7/10: OSS cache speed: 0.552446
Iter 7/10: ladvise speed: 0.723239
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.620635
Iter 8/10: OSS cache speed: 0.672041
Iter 8/10: ladvise speed: 0.672755
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.773165
Iter 9/10: OSS cache speed: 0.855451
Iter 9/10: ladvise speed: 0.849871
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.919735
Iter 10/10: OSS cache speed: 0.899261
Iter 10/10: ladvise speed: 0.800899
Average uncached read: .78
Average speedup with OSS cached read:  .78 = +0%
Average speedup with ladvise willread:  .77 = +-1%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0