== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:14:28 (1775168068)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.40344 s, 16.4 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-ffff8ccd830f8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.950655
Iter 1/10: OSS cache speed: 1.0202
Iter 1/10: ladvise speed: 1.27001
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.662614
Iter 2/10: OSS cache speed: 0.932673
Iter 2/10: ladvise speed: 0.892203
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.953486
Iter 3/10: OSS cache speed: 1.23051
Iter 3/10: ladvise speed: 1.30456
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.21801
Iter 4/10: OSS cache speed: 1.15319
Iter 4/10: ladvise speed: 0.97691
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.30587
Iter 5/10: OSS cache speed: 1.86147
Iter 5/10: ladvise speed: 1.63987
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.08162
Iter 6/10: OSS cache speed: 2.34464
Iter 6/10: ladvise speed: 2.45394
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.06327
Iter 7/10: OSS cache speed: 2.29776
Iter 7/10: ladvise speed: 2.15955
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.09304
Iter 8/10: OSS cache speed: 2.62019
Iter 8/10: ladvise speed: 2.23798
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.9964
Iter 9/10: OSS cache speed: 2.34194
Iter 9/10: ladvise speed: 2.14986
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.36869
Iter 10/10: OSS cache speed: 2.66165
Iter 10/10: ladvise speed: 2.27309
Average uncached read: 1.56
Average speedup with OSS cached read:  1.84 = +17%
Average speedup with ladvise willread:  1.73 = +10%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0