== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:44:41 (1777427081)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.40046 s, 19.4 MB/s
llite.lustre-ffff9520d1143000.read_ahead_stats=clear
llite.lustre-ffff9520d1143000.read_ahead_stats=
snapshot_time             1777427097.879234354 secs.nsecs
start_time                1777427088.648834520 secs.nsecs
elapsed_time              9.230399834 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=237410: Tue Apr 28 21:52:21 2026
  read: IOPS=11, BW=11.6MiB/s (12.2MB/s)(5120MiB/441378msec)
    clat (msec): min=47, max=248, avg=86.04, stdev=40.59
     lat (msec): min=47, max=248, avg=86.04, stdev=40.59
    clat percentiles (msec):
     |  1.00th=[   50],  5.00th=[   55], 10.00th=[   56], 20.00th=[   60],
     | 30.00th=[   64], 40.00th=[   67], 50.00th=[   71], 60.00th=[   77],
     | 70.00th=[   84], 80.00th=[   97], 90.00th=[  140], 95.00th=[  190],
     | 99.00th=[  228], 99.50th=[  232], 99.90th=[  243], 99.95th=[  247],
     | 99.99th=[  249]
   bw (  KiB/s): min= 4096, max=20480, per=100.00%, avg=11906.05, stdev=4422.80, samples=880
   iops        : min=    4, max=   20, avg=11.62, stdev= 4.32, samples=880
  lat (msec)   : 50=1.31%, 100=79.49%, 250=19.20%
  cpu          : usr=0.63%, sys=86.94%, ctx=14015, majf=5120, minf=1305867
  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=11.6MiB/s (12.2MB/s), 11.6MiB/s-11.6MiB/s (12.2MB/s-12.2MB/s), io=5120MiB (5369MB), run=441378-441378msec