== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:01:02 (1785222062)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.06199 s, 11.6 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-ffff88cf450d5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.527003
Iter 1/10: OSS cache speed: 0.506366
Iter 1/10: ladvise speed: 0.500942
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.573335
Iter 2/10: OSS cache speed: 0.570053
Iter 2/10: ladvise speed: 0.566109
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.584772
Iter 3/10: OSS cache speed: 0.612209
Iter 3/10: ladvise speed: 0.654405
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.592573
Iter 4/10: OSS cache speed: 0.669894
Iter 4/10: ladvise speed: 0.652774
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.668042
Iter 5/10: OSS cache speed: 0.337179
Iter 5/10: ladvise speed: 0.44445
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.551649
Iter 6/10: OSS cache speed: 0.516123
Iter 6/10: ladvise speed: 0.523965
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.469223
Iter 7/10: OSS cache speed: 0.489633
Iter 7/10: ladvise speed: 0.358732
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.333436
Iter 8/10: OSS cache speed: 0.423725
Iter 8/10: ladvise speed: 0.4504
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.489653
Iter 9/10: OSS cache speed: 0.477735
Iter 9/10: ladvise speed: 0.542035
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.548357
Iter 10/10: OSS cache speed: 0.578204
Iter 10/10: ladvise speed: 0.62162
Average uncached read: .53
Average speedup with OSS cached read:  .51 = +-3%
Average speedup with ladvise willread:  .53 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0