== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:51:15 (1775044275)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.36898 s, 16.5 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-ffffa08a51cc6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.839439
Iter 1/10: OSS cache speed: 1.0807
Iter 1/10: ladvise speed: 1.21288
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.90155
Iter 2/10: OSS cache speed: 1.18222
Iter 2/10: ladvise speed: 1.66946
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.52453
Iter 3/10: OSS cache speed: 1.95163
Iter 3/10: ladvise speed: 1.97347
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.07929
Iter 4/10: OSS cache speed: 2.08693
Iter 4/10: ladvise speed: 2.43588
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.16533
Iter 5/10: OSS cache speed: 2.21594
Iter 5/10: ladvise speed: 2.26267
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09057
Iter 6/10: OSS cache speed: 2.27612
Iter 6/10: ladvise speed: 2.36672
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.95826
Iter 7/10: OSS cache speed: 2.24532
Iter 7/10: ladvise speed: 2.51173
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.18391
Iter 8/10: OSS cache speed: 2.53866
Iter 8/10: ladvise speed: 2.50882
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.3123
Iter 9/10: OSS cache speed: 2.30775
Iter 9/10: ladvise speed: 2.43665
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.23207
Iter 10/10: OSS cache speed: 2.38742
Iter 10/10: ladvise speed: 2.45701
Average uncached read: 1.82
Average speedup with OSS cached read:  2.02 = +10%
Average speedup with ladvise willread:  2.18 = +19%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0