== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:51:19 (1784047879)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1852 s, 8.0 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-ffff9e2087e78000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37829
Iter 1/10: OSS cache speed: 0.268783
Iter 1/10: ladvise speed: 0.334644
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.355333
Iter 2/10: OSS cache speed: 0.316748
Iter 2/10: ladvise speed: 0.360321
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.329793
Iter 3/10: OSS cache speed: 0.326004
Iter 3/10: ladvise speed: 0.344605
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.363093
Iter 4/10: OSS cache speed: 0.364754
Iter 4/10: ladvise speed: 0.359923
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.317715
Iter 5/10: OSS cache speed: 0.314981
Iter 5/10: ladvise speed: 0.35551
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356633
Iter 6/10: OSS cache speed: 0.396194
Iter 6/10: ladvise speed: 0.446684
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.350684
Iter 7/10: OSS cache speed: 0.387452
Iter 7/10: ladvise speed: 0.362818
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.277674
Iter 8/10: OSS cache speed: 0.345828
Iter 8/10: ladvise speed: 0.342252
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.374907
Iter 9/10: OSS cache speed: 0.343769
Iter 9/10: ladvise speed: 0.343934
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.300533
Iter 10/10: OSS cache speed: 0.325943
Iter 10/10: ladvise speed: 0.342011
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0