== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:02:11 (1773655331)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.5874 s, 9.9 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-ffff9bccd083a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.396864
Iter 1/10: OSS cache speed: 0.411664
Iter 1/10: ladvise speed: 0.395526
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.423924
Iter 2/10: OSS cache speed: 0.360821
Iter 2/10: ladvise speed: 0.367755
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.378816
Iter 3/10: OSS cache speed: 0.361322
Iter 3/10: ladvise speed: 0.413198
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.446231
Iter 4/10: OSS cache speed: 0.437197
Iter 4/10: ladvise speed: 0.475331
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.374219
Iter 5/10: OSS cache speed: 0.38994
Iter 5/10: ladvise speed: 0.41542
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.41463
Iter 6/10: OSS cache speed: 0.379859
Iter 6/10: ladvise speed: 0.361903
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.358708
Iter 7/10: OSS cache speed: 0.406039
Iter 7/10: ladvise speed: 0.416868
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.44323
Iter 8/10: OSS cache speed: 0.43921
Iter 8/10: ladvise speed: 0.474852
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.495474
Iter 9/10: OSS cache speed: 0.462087
Iter 9/10: ladvise speed: 0.378214
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.286311
Iter 10/10: OSS cache speed: 0.325268
Iter 10/10: ladvise speed: 0.327433
Average uncached read: .40
Average speedup with OSS cached read:  .39 = +-2%
Average speedup with ladvise willread:  .40 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0