== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:32:43 (1767317563)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.3632 s, 10.1 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-ffff9857c5fb1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.520742
Iter 1/10: OSS cache speed: 0.54828
Iter 1/10: ladvise speed: 0.530373
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.561419
Iter 2/10: OSS cache speed: 0.63516
Iter 2/10: ladvise speed: 0.560309
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.436559
Iter 3/10: OSS cache speed: 0.544319
Iter 3/10: ladvise speed: 0.559669
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.467454
Iter 4/10: OSS cache speed: 0.539878
Iter 4/10: ladvise speed: 0.584774
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.499844
Iter 5/10: OSS cache speed: 0.446195
Iter 5/10: ladvise speed: 0.405806
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.39048
Iter 6/10: OSS cache speed: 0.449968
Iter 6/10: ladvise speed: 0.351766
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.465468
Iter 7/10: OSS cache speed: 0.481648
Iter 7/10: ladvise speed: 0.563837
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.511982
Iter 8/10: OSS cache speed: 0.558286
Iter 8/10: ladvise speed: 0.482878
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.485303
Iter 9/10: OSS cache speed: 0.576668
Iter 9/10: ladvise speed: 0.591081
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.467402
Iter 10/10: OSS cache speed: 0.594755
Iter 10/10: ladvise speed: 0.555343
Average uncached read: .48
Average speedup with OSS cached read:  .53 = +10%
Average speedup with ladvise willread:  .51 = +6%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0