== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:09:31 (1752689371)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.82507 s, 15.4 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-ffff9fae058fe800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.31449
Iter 1/10: OSS cache speed: 1.60541
Iter 1/10: ladvise speed: 1.7528
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.81248
Iter 2/10: OSS cache speed: 1.77139
Iter 2/10: ladvise speed: 1.47668
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.597
Iter 3/10: OSS cache speed: 1.79416
Iter 3/10: ladvise speed: 1.87523
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.99685
Iter 4/10: OSS cache speed: 1.97913
Iter 4/10: ladvise speed: 1.98098
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.98545
Iter 5/10: OSS cache speed: 1.95498
Iter 5/10: ladvise speed: 1.73213
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.69196
Iter 6/10: OSS cache speed: 1.80775
Iter 6/10: ladvise speed: 1.94903
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.95602
Iter 7/10: OSS cache speed: 2.05617
Iter 7/10: ladvise speed: 2.13776
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.07858
Iter 8/10: OSS cache speed: 2.10651
Iter 8/10: ladvise speed: 2.09053
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.07255
Iter 9/10: OSS cache speed: 2.08263
Iter 9/10: ladvise speed: 2.14904
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.0627
Iter 10/10: OSS cache speed: 2.12079
Iter 10/10: ladvise speed: 2.14187
Average uncached read: 1.85
Average speedup with OSS cached read:  1.92 = +3%
Average speedup with ladvise willread:  1.92 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0