== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:58:24 (1746147504)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 9.36539 s, 11.2 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-ffff88012a5a9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.541917
Iter 1/10: OSS cache speed: 0.747296
Iter 1/10: ladvise speed: 0.733008
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.678644
Iter 2/10: OSS cache speed: 0.732017
Iter 2/10: ladvise speed: 0.745075
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.6647
Iter 3/10: OSS cache speed: 0.773137
Iter 3/10: ladvise speed: 0.720011
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.666024
Iter 4/10: OSS cache speed: 0.738263
Iter 4/10: ladvise speed: 0.755839
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.661317
Iter 5/10: OSS cache speed: 0.733869
Iter 5/10: ladvise speed: 0.718591
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.690316
Iter 6/10: OSS cache speed: 0.69007
Iter 6/10: ladvise speed: 0.747345
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.672018
Iter 7/10: OSS cache speed: 0.702239
Iter 7/10: ladvise speed: 0.694449
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.593322
Iter 8/10: OSS cache speed: 0.711487
Iter 8/10: ladvise speed: 0.810914
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.757963
Iter 9/10: OSS cache speed: 0.78548
Iter 9/10: ladvise speed: 0.64003
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.620104
Iter 10/10: OSS cache speed: 0.691338
Iter 10/10: ladvise speed: 0.662582
Average uncached read: .65
Average speedup with OSS cached read:  .73 = +12%
Average speedup with ladvise willread:  .72 = +10%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0