== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:12:44 (1763345564)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.45499 s, 11.1 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-ffff8c16128d6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.334963
Iter 1/10: OSS cache speed: 0.382017
Iter 1/10: ladvise speed: 0.419498
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.351413
Iter 2/10: OSS cache speed: 0.424531
Iter 2/10: ladvise speed: 0.470733
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.392591
Iter 3/10: OSS cache speed: 0.444176
Iter 3/10: ladvise speed: 0.429584
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.316352
Iter 4/10: OSS cache speed: 0.45052
Iter 4/10: ladvise speed: 0.398615
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.37798
Iter 5/10: OSS cache speed: 0.405573
Iter 5/10: ladvise speed: 0.429587
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.335916
Iter 6/10: OSS cache speed: 0.430673
Iter 6/10: ladvise speed: 0.432615
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.389235
Iter 7/10: OSS cache speed: 0.41017
Iter 7/10: ladvise speed: 0.451436
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.41518
Iter 8/10: OSS cache speed: 0.442238
Iter 8/10: ladvise speed: 0.497526
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.482854
Iter 9/10: OSS cache speed: 0.508638
Iter 9/10: ladvise speed: 0.575013
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.469346
Iter 10/10: OSS cache speed: 0.46134
Iter 10/10: ladvise speed: 0.524331
Average uncached read: .38
Average speedup with OSS cached read:  .43 = +13%
Average speedup with ladvise willread:  .46 = +21%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0