== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:25:14 (1769754314)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9475 s, 7.0 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-ffff8d164b6be800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.292251
Iter 1/10: OSS cache speed: 0.423986
Iter 1/10: ladvise speed: 0.363987
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.332111
Iter 2/10: OSS cache speed: 0.347273
Iter 2/10: ladvise speed: 0.352206
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.315714
Iter 3/10: OSS cache speed: 0.293206
Iter 3/10: ladvise speed: 0.35641
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.279278
Iter 4/10: OSS cache speed: 0.418225
Iter 4/10: ladvise speed: 0.341626
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.319572
Iter 5/10: OSS cache speed: 0.382019
Iter 5/10: ladvise speed: 0.368549
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.364093
Iter 6/10: OSS cache speed: 0.362329
Iter 6/10: ladvise speed: 0.390018
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.440885
Iter 7/10: OSS cache speed: 0.491467
Iter 7/10: ladvise speed: 0.464444
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.377113
Iter 8/10: OSS cache speed: 0.39014
Iter 8/10: ladvise speed: 0.410584
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.430915
Iter 9/10: OSS cache speed: 0.44524
Iter 9/10: ladvise speed: 0.48883
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.416594
Iter 10/10: OSS cache speed: 0.480221
Iter 10/10: ladvise speed: 0.418265
Average uncached read: .35
Average speedup with OSS cached read:  .40 = +14%
Average speedup with ladvise willread:  .39 = +11%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0