== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:49:52 (1788943792)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4023 s, 8.5 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-ffff9fe448a39000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.425406
Iter 1/10: OSS cache speed: 0.448747
Iter 1/10: ladvise speed: 0.395455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.376881
Iter 2/10: OSS cache speed: 0.400178
Iter 2/10: ladvise speed: 0.337423
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.337964
Iter 3/10: OSS cache speed: 0.466372
Iter 3/10: ladvise speed: 0.443934
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.437559
Iter 4/10: OSS cache speed: 0.422924
Iter 4/10: ladvise speed: 0.413633
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.367475
Iter 5/10: OSS cache speed: 0.435059
Iter 5/10: ladvise speed: 0.422573
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.393987
Iter 6/10: OSS cache speed: 0.452886
Iter 6/10: ladvise speed: 0.394108
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.484455
Iter 7/10: OSS cache speed: 0.505967
Iter 7/10: ladvise speed: 0.430492
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.457336
Iter 8/10: OSS cache speed: 0.376035
Iter 8/10: ladvise speed: 0.456581
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.489976
Iter 9/10: OSS cache speed: 0.413066
Iter 9/10: ladvise speed: 0.349
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.35946
Iter 10/10: OSS cache speed: 0.414478
Iter 10/10: ladvise speed: 0.348307
Average uncached read: .41
Average speedup with OSS cached read:  .43 = +4%
Average speedup with ladvise willread:  .39 = +-4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0