== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:58:55 (1763348335)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2547 s, 10.2 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-ffff9aef84d2f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.448937
Iter 1/10: OSS cache speed: 0.578921
Iter 1/10: ladvise speed: 0.534966
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.499594
Iter 2/10: OSS cache speed: 0.523095
Iter 2/10: ladvise speed: 0.480629
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.423551
Iter 3/10: OSS cache speed: 0.474382
Iter 3/10: ladvise speed: 0.469017
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.369341
Iter 4/10: OSS cache speed: 0.422118
Iter 4/10: ladvise speed: 0.449904
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387683
Iter 5/10: OSS cache speed: 0.483032
Iter 5/10: ladvise speed: 0.542376
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.388829
Iter 6/10: OSS cache speed: 0.45866
Iter 6/10: ladvise speed: 0.549718
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.424755
Iter 7/10: OSS cache speed: 0.467905
Iter 7/10: ladvise speed: 0.41588
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.428954
Iter 8/10: OSS cache speed: 0.436759
Iter 8/10: ladvise speed: 0.488232
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.432287
Iter 9/10: OSS cache speed: 0.425702
Iter 9/10: ladvise speed: 0.415439
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.326571
Iter 10/10: OSS cache speed: 0.423811
Iter 10/10: ladvise speed: 0.445194
Average uncached read: .41
Average speedup with OSS cached read:  .46 = +12%
Average speedup with ladvise willread:  .47 = +14%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0