== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 08:48:32 (1788612512)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.3794 s, 7.3 MB/s
llite.lustre-ffff9a149228b000.read_ahead_stats=clear
llite.lustre-ffff9a149228b000.read_ahead_stats=
snapshot_time             1788612548.900488890 secs.nsecs
start_time                1788612532.530666129 secs.nsecs
elapsed_time              16.369822761 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          4 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=291160: Sat Sep  5 09:08:04 2026
  read: IOPS=4, BW=4659KiB/s (4771kB/s)(5120MiB/1125314msec)
    clat (msec): min=39, max=652, avg=219.14, stdev=57.75
     lat (msec): min=39, max=652, avg=219.15, stdev=57.75
    clat percentiles (msec):
     |  1.00th=[  114],  5.00th=[  138], 10.00th=[  153], 20.00th=[  174],
     | 30.00th=[  186], 40.00th=[  201], 50.00th=[  213], 60.00th=[  228],
     | 70.00th=[  243], 80.00th=[  262], 90.00th=[  292], 95.00th=[  321],
     | 99.00th=[  393], 99.50th=[  435], 99.90th=[  514], 99.95th=[  531],
     | 99.99th=[  651]
   bw (  KiB/s): min= 1921, max=10240, per=100.00%, avg=4676.19, stdev=1303.33, samples=2227
   iops        : min=    1, max=   10, avg= 3.86, stdev= 1.37, samples=2227
  lat (msec)   : 50=0.04%, 100=0.21%, 250=74.39%, 500=25.23%, 750=0.12%
  cpu          : usr=0.28%, sys=27.70%, ctx=35430, majf=5555, minf=1305434
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=4659KiB/s (4771kB/s), 4659KiB/s-4659KiB/s (4771kB/s-4771kB/s), io=5120MiB (5369MB), run=1125314-1125314msec