== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:20:58 (1779690058)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2729 s, 10.2 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-ffff8c72482c5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.398333
Iter 1/10: OSS cache speed: 0.422224
Iter 1/10: ladvise speed: 0.42399
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.4547
Iter 2/10: OSS cache speed: 0.457921
Iter 2/10: ladvise speed: 0.455212
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.481721
Iter 3/10: OSS cache speed: 0.487921
Iter 3/10: ladvise speed: 0.487916
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.500647
Iter 4/10: OSS cache speed: 0.539987
Iter 4/10: ladvise speed: 0.521265
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.492972
Iter 5/10: OSS cache speed: 0.251817
Iter 5/10: ladvise speed: 0.391267
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.389557
Iter 6/10: OSS cache speed: 0.395943
Iter 6/10: ladvise speed: 0.433415
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.48025
Iter 7/10: OSS cache speed: 0.627053
Iter 7/10: ladvise speed: 0.575598
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.636516
Iter 8/10: OSS cache speed: 0.748881
Iter 8/10: ladvise speed: 0.819922
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.707701
Iter 9/10: OSS cache speed: 0.666076
Iter 9/10: ladvise speed: 0.737657
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.766351
Iter 10/10: OSS cache speed: 0.836555
Iter 10/10: ladvise speed: 0.720349
Average uncached read: .53
Average speedup with OSS cached read:  .54 = +1%
Average speedup with ladvise willread:  .55 = +3%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0