== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:15:52 (1776870952)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.29742 s, 16.7 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-ffffa0a18b2db800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.06071
Iter 1/10: OSS cache speed: 2.1284
Iter 1/10: ladvise speed: 2.03212
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.03762
Iter 2/10: OSS cache speed: 2.06371
Iter 2/10: ladvise speed: 2.04377
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.99799
Iter 3/10: OSS cache speed: 1.99677
Iter 3/10: ladvise speed: 1.98354
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.83089
Iter 4/10: OSS cache speed: 1.8693
Iter 4/10: ladvise speed: 1.33581
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.94377
Iter 5/10: OSS cache speed: 1.86849
Iter 5/10: ladvise speed: 1.97221
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.82306
Iter 6/10: OSS cache speed: 1.92324
Iter 6/10: ladvise speed: 2.01746
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.04612
Iter 7/10: OSS cache speed: 1.05516
Iter 7/10: ladvise speed: 1.45227
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.1932
Iter 8/10: OSS cache speed: 1.18416
Iter 8/10: ladvise speed: 0.821985
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.924565
Iter 9/10: OSS cache speed: 0.967247
Iter 9/10: ladvise speed: 0.890476
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.591295
Iter 10/10: OSS cache speed: 0.688772
Iter 10/10: ladvise speed: 0.752454
Average uncached read: 1.64
Average speedup with OSS cached read:  1.57 = +-4%
Average speedup with ladvise willread:  1.53 = +-6%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0