== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:44:28 (1763340268)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.471 s, 8.4 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-ffff8f65c62de800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.381867
Iter 1/10: OSS cache speed: 0.463557
Iter 1/10: ladvise speed: 0.397593
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.433197
Iter 2/10: OSS cache speed: 0.482632
Iter 2/10: ladvise speed: 0.490602
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.446728
Iter 3/10: OSS cache speed: 0.501476
Iter 3/10: ladvise speed: 0.521246
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.400724
Iter 4/10: OSS cache speed: 0.452488
Iter 4/10: ladvise speed: 0.554406
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.465735
Iter 5/10: OSS cache speed: 0.528027
Iter 5/10: ladvise speed: 0.528674
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.420847
Iter 6/10: OSS cache speed: 0.451437
Iter 6/10: ladvise speed: 0.455822
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.395884
Iter 7/10: OSS cache speed: 0.459859
Iter 7/10: ladvise speed: 0.489693
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433171
Iter 8/10: OSS cache speed: 0.415049
Iter 8/10: ladvise speed: 0.474417
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.522981
Iter 9/10: OSS cache speed: 0.464566
Iter 9/10: ladvise speed: 0.500076
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.422487
Iter 10/10: OSS cache speed: 0.473275
Iter 10/10: ladvise speed: 0.436464
Average uncached read: .43
Average speedup with OSS cached read:  .46 = +6%
Average speedup with ladvise willread:  .48 = +11%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0