On 7/22/15 1:09 AM, Kaixu Xia wrote:
+SEC("kprobe/sys_write")
+int bpf_prog1(struct pt_regs *ctx)
+{
+ u64 count;
+ u32 key = bpf_get_smp_processor_id();
+ char fmt[] = "bpf count: CPU-%d %llu\n";
+
+ count = bpf_perf_event_read(&my_map, &key);
+ bpf_trace_printk(fmt, sizeof(fmt), key, count);
+
+ return 0;
+}
overall the whole thing looks much better, but since you can print
anything, print some sensible string here instead of 'bpf count'.
Thanks!
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