== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:06:51 (1787850411)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9394 s, 8.1 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-ffff9938454f0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.348064
Iter 1/10: OSS cache speed: 0.314314
Iter 1/10: ladvise speed: 0.373827
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.299915
Iter 2/10: OSS cache speed: 0.305792
Iter 2/10: ladvise speed: 0.225964
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.31045
Iter 3/10: OSS cache speed: 0.334817
Iter 3/10: ladvise speed: 0.301191
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.303484
Iter 4/10: OSS cache speed: 0.280222
Iter 4/10: ladvise speed: 0.26175
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.285137
Iter 5/10: OSS cache speed: 0.259604
Iter 5/10: ladvise speed: 0.315648
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.336609
Iter 6/10: OSS cache speed: 0.285203
Iter 6/10: ladvise speed: 0.261595
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.269824
Iter 7/10: OSS cache speed: 0.291155
Iter 7/10: ladvise speed: 0.289161
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.265827
Iter 8/10: OSS cache speed: 0.310842
Iter 8/10: ladvise speed: 0.277372
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.234268
Iter 9/10: OSS cache speed: 0.265733
Iter 9/10: ladvise speed: 0.271116
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.216051
Iter 10/10: OSS cache speed: 0.294736
Iter 10/10: ladvise speed: 0.300633
Average uncached read: .28
Average speedup with OSS cached read:  .29 = +3%
Average speedup with ladvise willread:  .28 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0