== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:56:27 (1765104987)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.83795 s, 15.3 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-ffff98bbc56ae800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.661592
Iter 1/10: OSS cache speed: 0.673569
Iter 1/10: ladvise speed: 0.638746
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.680896
Iter 2/10: OSS cache speed: 0.674912
Iter 2/10: ladvise speed: 0.702
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.663645
Iter 3/10: OSS cache speed: 0.644743
Iter 3/10: ladvise speed: 0.679631
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.67502
Iter 4/10: OSS cache speed: 0.726613
Iter 4/10: ladvise speed: 0.821364
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.806899
Iter 5/10: OSS cache speed: 0.860923
Iter 5/10: ladvise speed: 0.841074
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.846751
Iter 6/10: OSS cache speed: 0.927442
Iter 6/10: ladvise speed: 0.973222
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.04337
Iter 7/10: OSS cache speed: 1.17753
Iter 7/10: ladvise speed: 1.38298
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.70442
Iter 8/10: OSS cache speed: 1.87413
Iter 8/10: ladvise speed: 1.62398
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.22404
Iter 9/10: OSS cache speed: 1.37225
Iter 9/10: ladvise speed: 1.84443
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.83836
Iter 10/10: OSS cache speed: 1.74192
Iter 10/10: ladvise speed: 1.79625
Average uncached read: 1.01
Average speedup with OSS cached read:  1.06 = +4%
Average speedup with ladvise willread:  1.13 = +11%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0