== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:06:49 (1763334409)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.67783 s, 10.8 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-ffff9acb06c54800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.530565
Iter 1/10: OSS cache speed: 0.423631
Iter 1/10: ladvise speed: 0.484873
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.478419
Iter 2/10: OSS cache speed: 0.553933
Iter 2/10: ladvise speed: 0.519653
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.511101
Iter 3/10: OSS cache speed: 0.474824
Iter 3/10: ladvise speed: 0.456017
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.483195
Iter 4/10: OSS cache speed: 0.529704
Iter 4/10: ladvise speed: 0.516696
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.524716
Iter 5/10: OSS cache speed: 0.512894
Iter 5/10: ladvise speed: 0.472468
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.476018
Iter 6/10: OSS cache speed: 0.488395
Iter 6/10: ladvise speed: 0.480272
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.44983
Iter 7/10: OSS cache speed: 0.437152
Iter 7/10: ladvise speed: 0.523181
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.510191
Iter 8/10: OSS cache speed: 0.537161
Iter 8/10: ladvise speed: 0.489849
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.460916
Iter 9/10: OSS cache speed: 0.394868
Iter 9/10: ladvise speed: 0.490376
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.481423
Iter 10/10: OSS cache speed: 0.448181
Iter 10/10: ladvise speed: 0.496888
Average uncached read: .49
Average speedup with OSS cached read:  .48 = +-2%
Average speedup with ladvise willread:  .49 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0