== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:57:55 (1788739075)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.54693 s, 11.0 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-ffff9fee07c92800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.463313
Iter 1/10: OSS cache speed: 0.372823
Iter 1/10: ladvise speed: 0.30619
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.503164
Iter 2/10: OSS cache speed: 0.380049
Iter 2/10: ladvise speed: 0.344764
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.338125
Iter 3/10: OSS cache speed: 0.256702
Iter 3/10: ladvise speed: 0.29899
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356688
Iter 4/10: OSS cache speed: 0.426052
Iter 4/10: ladvise speed: 0.448116
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.429201
Iter 5/10: OSS cache speed: 0.370725
Iter 5/10: ladvise speed: 0.451667
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.345288
Iter 6/10: OSS cache speed: 0.436661
Iter 6/10: ladvise speed: 0.463269
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.453145
Iter 7/10: OSS cache speed: 0.394486
Iter 7/10: ladvise speed: 0.39236
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.434815
Iter 8/10: OSS cache speed: 0.489351
Iter 8/10: ladvise speed: 0.438296
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.406371
Iter 9/10: OSS cache speed: 0.423646
Iter 9/10: ladvise speed: 0.299946
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.277503
Iter 10/10: OSS cache speed: 0.317336
Iter 10/10: ladvise speed: 0.422361
Average uncached read: .40
Average speedup with OSS cached read:  .38 = +-5%
Average speedup with ladvise willread:  .38 = +-5%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0