== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:03:46 (1787796226)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5732 s, 7.7 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-ffff8b66929b3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.40337
Iter 1/10: OSS cache speed: 0.442986
Iter 1/10: ladvise speed: 0.459398
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.350822
Iter 2/10: OSS cache speed: 0.384079
Iter 2/10: ladvise speed: 0.379689
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.340342
Iter 3/10: OSS cache speed: 0.379287
Iter 3/10: ladvise speed: 0.418495
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.341211
Iter 4/10: OSS cache speed: 0.416507
Iter 4/10: ladvise speed: 0.392278
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.376577
Iter 5/10: OSS cache speed: 0.419541
Iter 5/10: ladvise speed: 0.399294
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.359627
Iter 6/10: OSS cache speed: 0.417772
Iter 6/10: ladvise speed: 0.42727
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388399
Iter 7/10: OSS cache speed: 0.454154
Iter 7/10: ladvise speed: 0.456425
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.380875
Iter 8/10: OSS cache speed: 0.431571
Iter 8/10: ladvise speed: 0.405508
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.381387
Iter 9/10: OSS cache speed: 0.400868
Iter 9/10: ladvise speed: 0.462507
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.357852
Iter 10/10: OSS cache speed: 0.383509
Iter 10/10: ladvise speed: 0.402064
Average uncached read: .36
Average speedup with OSS cached read:  .41 = +13%
Average speedup with ladvise willread:  .42 = +16%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0