== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:59:02 (1788584342)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.89312 s, 10.6 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-ffff8ab802982800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.374191
Iter 1/10: OSS cache speed: 0.344236
Iter 1/10: ladvise speed: 0.366474
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.366556
Iter 2/10: OSS cache speed: 0.322951
Iter 2/10: ladvise speed: 0.32327
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.297078
Iter 3/10: OSS cache speed: 0.309091
Iter 3/10: ladvise speed: 0.339791
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.333373
Iter 4/10: OSS cache speed: 0.333949
Iter 4/10: ladvise speed: 0.295777
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.327669
Iter 5/10: OSS cache speed: 0.306148
Iter 5/10: ladvise speed: 0.357861
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372919
Iter 6/10: OSS cache speed: 0.3357
Iter 6/10: ladvise speed: 0.355976
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.354718
Iter 7/10: OSS cache speed: 0.348174
Iter 7/10: ladvise speed: 0.341448
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.311131
Iter 8/10: OSS cache speed: 0.330248
Iter 8/10: ladvise speed: 0.343957
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.308089
Iter 9/10: OSS cache speed: 0.318412
Iter 9/10: ladvise speed: 0.320291
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.341101
Iter 10/10: OSS cache speed: 0.341196
Iter 10/10: ladvise speed: 0.332842
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .33 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0