== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:02:34 (1781226154)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.06669 s, 14.8 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-ffff96c1c4582800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.770882
Iter 1/10: OSS cache speed: 1.0354
Iter 1/10: ladvise speed: 0.979604
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.716863
Iter 2/10: OSS cache speed: 0.882434
Iter 2/10: ladvise speed: 0.891603
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.713451
Iter 3/10: OSS cache speed: 0.840302
Iter 3/10: ladvise speed: 0.976331
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.730546
Iter 4/10: OSS cache speed: 0.801094
Iter 4/10: ladvise speed: 0.867854
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.775838
Iter 5/10: OSS cache speed: 0.870724
Iter 5/10: ladvise speed: 0.863038
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.763311
Iter 6/10: OSS cache speed: 0.903693
Iter 6/10: ladvise speed: 0.732525
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.84483
Iter 7/10: OSS cache speed: 0.7175
Iter 7/10: ladvise speed: 0.661481
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.632863
Iter 8/10: OSS cache speed: 0.700701
Iter 8/10: ladvise speed: 0.827744
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.682484
Iter 9/10: OSS cache speed: 0.803882
Iter 9/10: ladvise speed: 1.05399
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.781431
Iter 10/10: OSS cache speed: 0.92886
Iter 10/10: ladvise speed: 1.21722
Average uncached read: .74
Average speedup with OSS cached read:  .84 = +13%
Average speedup with ladvise willread:  .90 = +21%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0