== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:22:31 (1788931351)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.287 s, 7.3 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-ffff9aa7d1c52000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.419909
Iter 1/10: OSS cache speed: 0.511181
Iter 1/10: ladvise speed: 0.483681
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.395321
Iter 2/10: OSS cache speed: 0.411877
Iter 2/10: ladvise speed: 0.499939
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.451217
Iter 3/10: OSS cache speed: 0.523496
Iter 3/10: ladvise speed: 0.452885
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.367802
Iter 4/10: OSS cache speed: 0.373867
Iter 4/10: ladvise speed: 0.373894
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.329271
Iter 5/10: OSS cache speed: 0.362179
Iter 5/10: ladvise speed: 0.433116
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.367084
Iter 6/10: OSS cache speed: 0.393116
Iter 6/10: ladvise speed: 0.425009
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.379949
Iter 7/10: OSS cache speed: 0.41514
Iter 7/10: ladvise speed: 0.39247
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.423985
Iter 8/10: OSS cache speed: 0.47103
Iter 8/10: ladvise speed: 0.374365
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.343018
Iter 9/10: OSS cache speed: 0.408348
Iter 9/10: ladvise speed: 0.430713
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.397427
Iter 10/10: OSS cache speed: 0.444756
Iter 10/10: ladvise speed: 0.433334
Average uncached read: .38
Average speedup with OSS cached read:  .43 = +13%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0