== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:58:04 (1734116284)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.58829 s, 40.5 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-ffff8800b6cdc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.65388
Iter 1/10: OSS cache speed: 3.14507
Iter 1/10: ladvise speed: 2.7271
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.70461
Iter 2/10: OSS cache speed: 3.20913
Iter 2/10: ladvise speed: 3.00404
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 3.07144
Iter 3/10: OSS cache speed: 3.24204
Iter 3/10: ladvise speed: 3.24361
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.9617
Iter 4/10: OSS cache speed: 3.26693
Iter 4/10: ladvise speed: 3.20383
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.00899
Iter 5/10: OSS cache speed: 3.15216
Iter 5/10: ladvise speed: 2.91536
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.91255
Iter 6/10: OSS cache speed: 3.283
Iter 6/10: ladvise speed: 3.22792
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.89178
Iter 7/10: OSS cache speed: 3.23937
Iter 7/10: ladvise speed: 3.33574
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.83493
Iter 8/10: OSS cache speed: 3.3287
Iter 8/10: ladvise speed: 2.54536
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.36965
Iter 9/10: OSS cache speed: 3.03816
Iter 9/10: ladvise speed: 2.90438
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.61297
Iter 10/10: OSS cache speed: 3.16503
Iter 10/10: ladvise speed: 2.7179
Average uncached read: 2.80
Average speedup with OSS cached read:  3.20 = +14%
Average speedup with ladvise willread:  2.98 = +6%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0