== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:26:13 (1744046773)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.34566 s, 44.7 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-ffff8800b5df2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.59972
Iter 1/10: OSS cache speed: 2.46603
Iter 1/10: ladvise speed: 2.53716
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.31951
Iter 2/10: OSS cache speed: 2.64737
Iter 2/10: ladvise speed: 2.5659
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.60815
Iter 3/10: OSS cache speed: 2.72605
Iter 3/10: ladvise speed: 2.67364
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.47101
Iter 4/10: OSS cache speed: 2.59126
Iter 4/10: ladvise speed: 2.37949
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15355
Iter 5/10: OSS cache speed: 2.76625
Iter 5/10: ladvise speed: 2.82113
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.63083
Iter 6/10: OSS cache speed: 2.82513
Iter 6/10: ladvise speed: 2.81294
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.75388
Iter 7/10: OSS cache speed: 2.83208
Iter 7/10: ladvise speed: 2.79158
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.77276
Iter 8/10: OSS cache speed: 2.70524
Iter 8/10: ladvise speed: 2.83254
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.80942
Iter 9/10: OSS cache speed: 2.63709
Iter 9/10: ladvise speed: 2.77823
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.7887
Iter 10/10: OSS cache speed: 2.76391
Iter 10/10: ladvise speed: 2.79947
Average uncached read: 2.59
Average speedup with OSS cached read:  2.69 = +3%
Average speedup with ladvise willread:  2.69 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0