== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:55:45 (1731750945)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.45248 s, 42.8 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-ffff88012abf8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.40155
Iter 1/10: OSS cache speed: 2.53339
Iter 1/10: ladvise speed: 2.56024
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.55664
Iter 2/10: OSS cache speed: 2.53488
Iter 2/10: ladvise speed: 2.51726
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.51834
Iter 3/10: OSS cache speed: 2.66169
Iter 3/10: ladvise speed: 2.6401
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.58997
Iter 4/10: OSS cache speed: 2.79619
Iter 4/10: ladvise speed: 2.73621
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.66607
Iter 5/10: OSS cache speed: 2.77903
Iter 5/10: ladvise speed: 2.76963
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.63753
Iter 6/10: OSS cache speed: 2.37872
Iter 6/10: ladvise speed: 2.53418
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.62337
Iter 7/10: OSS cache speed: 2.67865
Iter 7/10: ladvise speed: 2.5839
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.77247
Iter 8/10: OSS cache speed: 2.82605
Iter 8/10: ladvise speed: 2.72067
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.74301
Iter 9/10: OSS cache speed: 2.64866
Iter 9/10: ladvise speed: 2.79977
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.18424
Iter 10/10: OSS cache speed: 2.7185
Iter 10/10: ladvise speed: 2.86725
Average uncached read: 2.56
Average speedup with OSS cached read:  2.65 = +3%
Average speedup with ladvise willread:  2.67 = +4%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0