== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:36:45 (1789447005)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3592 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-ffffa00318d4a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.429539
Iter 1/10: OSS cache speed: 0.405153
Iter 1/10: ladvise speed: 0.433314
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.403522
Iter 2/10: OSS cache speed: 0.403772
Iter 2/10: ladvise speed: 0.507107
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.503866
Iter 3/10: OSS cache speed: 0.46889
Iter 3/10: ladvise speed: 0.514281
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.484819
Iter 4/10: OSS cache speed: 0.457892
Iter 4/10: ladvise speed: 0.526937
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.527903
Iter 5/10: OSS cache speed: 0.450142
Iter 5/10: ladvise speed: 0.524803
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.470574
Iter 6/10: OSS cache speed: 0.460237
Iter 6/10: ladvise speed: 0.430278
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.458541
Iter 7/10: OSS cache speed: 0.523501
Iter 7/10: ladvise speed: 0.516179
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.48088
Iter 8/10: OSS cache speed: 0.475698
Iter 8/10: ladvise speed: 0.362414
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.479552
Iter 9/10: OSS cache speed: 0.558943
Iter 9/10: ladvise speed: 0.456152
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.501692
Iter 10/10: OSS cache speed: 0.492492
Iter 10/10: ladvise speed: 0.568609
Average uncached read: .47
Average speedup with OSS cached read:  .46 = +-2%
Average speedup with ladvise willread:  .48 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0