Hi, I enjoy the book so much and am making a Japanese translation here. https://sites.google.com/site/kandamotohiro/perfbook I think I have found 2 typos in perfbook. Latest git repo also has these bugs. 5.6 Parallel Counting Discussion on page 82, in file count.tex says, "The per-thread variable implementation (count_stat.c) is significantly faster on updates than the array-based implementation (count_end.c), but is slower at reads" But it should read per-thread variable implementation(count_end.c) and array-based implementation (count_stat.c) And according to table 5.1, array-based implementation has 408 ns vs. per-thread variable implementation has 389 ns. so, per-thread variable implementation is a little faster, not slower at 1 core read. Table 9.7 Which Deferred Technique to Choose? on page 228 in file whichtochoose.tex says, Sequence Locks has "Y" on Updates and Readers Progress Concurrently But it should be N because on page 229, it says sequence locking does not permit updates and readers to make forward progress concurrently -- Kanda Motohiro -- To unsubscribe from this list: send the line "unsubscribe perfbook" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
