== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:52:07 (1787698327)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.82996 s, 18.0 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-ffffa03082bd4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.43739
Iter 1/10: OSS cache speed: 2.8081
Iter 1/10: ladvise speed: 2.65444
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.4335
Iter 2/10: OSS cache speed: 2.88418
Iter 2/10: ladvise speed: 2.61498
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.47106
Iter 3/10: OSS cache speed: 2.83308
Iter 3/10: ladvise speed: 2.65594
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.6586
Iter 4/10: OSS cache speed: 2.87728
Iter 4/10: ladvise speed: 2.46667
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.9372
Iter 5/10: OSS cache speed: 2.32418
Iter 5/10: ladvise speed: 2.64513
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.61188
Iter 6/10: OSS cache speed: 1.02325
Iter 6/10: ladvise speed: 0.726352
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.437179
Iter 7/10: OSS cache speed: 0.30727
Iter 7/10: ladvise speed: 0.462159
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.407588
Iter 8/10: OSS cache speed: 0.410925
Iter 8/10: ladvise speed: 0.368712
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333365
Iter 9/10: OSS cache speed: 0.38237
Iter 9/10: ladvise speed: 0.348279
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.336123
Iter 10/10: OSS cache speed: 0.37132
Iter 10/10: ladvise speed: 0.335909
Average uncached read: 1.50
Average speedup with OSS cached read:  1.62 = +8%
Average speedup with ladvise willread:  1.52 = +1%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0