== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:18:56 (1746065936)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.9247 s, 21.3 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-ffff8800b6012800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.752201
Iter 1/10: OSS cache speed: 0.951195
Iter 1/10: ladvise speed: 1.01172
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.914259
Iter 2/10: OSS cache speed: 1.04717
Iter 2/10: ladvise speed: 1.05149
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.914287
Iter 3/10: OSS cache speed: 1.02351
Iter 3/10: ladvise speed: 1.04922
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.762465
Iter 4/10: OSS cache speed: 0.846052
Iter 4/10: ladvise speed: 0.869348
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.861752
Iter 5/10: OSS cache speed: 1.00463
Iter 5/10: ladvise speed: 1.13823
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.0475
Iter 6/10: OSS cache speed: 1.06251
Iter 6/10: ladvise speed: 1.05568
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.944444
Iter 7/10: OSS cache speed: 1.09007
Iter 7/10: ladvise speed: 1.36123
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.00871
Iter 8/10: OSS cache speed: 1.07423
Iter 8/10: ladvise speed: 0.994623
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.896379
Iter 9/10: OSS cache speed: 1.17673
Iter 9/10: ladvise speed: 1.29766
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.11885
Iter 10/10: OSS cache speed: 1.20435
Iter 10/10: ladvise speed: 1.29391
Average uncached read: .92
Average speedup with OSS cached read:  1.04 = +13%
Average speedup with ladvise willread:  1.11 = +20%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0