== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:55:16 (1787662516)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2654 s, 7.4 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-ffff994f49523800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.328542
Iter 1/10: OSS cache speed: 0.315194
Iter 1/10: ladvise speed: 0.267474
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.280965
Iter 2/10: OSS cache speed: 0.317263
Iter 2/10: ladvise speed: 0.363744
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.265523
Iter 3/10: OSS cache speed: 0.297077
Iter 3/10: ladvise speed: 0.329124
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.277572
Iter 4/10: OSS cache speed: 0.312597
Iter 4/10: ladvise speed: 0.30027
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.285589
Iter 5/10: OSS cache speed: 0.332393
Iter 5/10: ladvise speed: 0.309296
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.268641
Iter 6/10: OSS cache speed: 0.358756
Iter 6/10: ladvise speed: 0.28809
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.295844
Iter 7/10: OSS cache speed: 0.309517
Iter 7/10: ladvise speed: 0.336684
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.303459
Iter 8/10: OSS cache speed: 0.332755
Iter 8/10: ladvise speed: 0.285758
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.315782
Iter 9/10: OSS cache speed: 0.306495
Iter 9/10: ladvise speed: 0.347771
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.333458
Iter 10/10: OSS cache speed: 0.286361
Iter 10/10: ladvise speed: 0.280941
Average uncached read: .29
Average speedup with OSS cached read:  .31 = +6%
Average speedup with ladvise willread:  .31 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0