== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:13:57 (1755638037)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.80964 s, 18.0 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-ffff8ecf84cf4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.14913
Iter 1/10: OSS cache speed: 2.38976
Iter 1/10: ladvise speed: 2.43747
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.38584
Iter 2/10: OSS cache speed: 2.58771
Iter 2/10: ladvise speed: 2.5675
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.29091
Iter 3/10: OSS cache speed: 2.09578
Iter 3/10: ladvise speed: 1.79032
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.30537
Iter 4/10: OSS cache speed: 2.03839
Iter 4/10: ladvise speed: 1.92028
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.32501
Iter 5/10: OSS cache speed: 2.24476
Iter 5/10: ladvise speed: 2.5772
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.25368
Iter 6/10: OSS cache speed: 2.15776
Iter 6/10: ladvise speed: 1.7988
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.97239
Iter 7/10: OSS cache speed: 1.70946
Iter 7/10: ladvise speed: 1.4303
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.74328
Iter 8/10: OSS cache speed: 2.02369
Iter 8/10: ladvise speed: 1.55108
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.75449
Iter 9/10: OSS cache speed: 1.52985
Iter 9/10: ladvise speed: 1.33309
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.44068
Iter 10/10: OSS cache speed: 1.74969
Iter 10/10: ladvise speed: 1.30005
Average uncached read: 1.96
Average speedup with OSS cached read:  2.05 = +4%
Average speedup with ladvise willread:  1.87 = +-4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0