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Date: Wed, 19 Mar 2014 11:45:15 +0100
From: Jiri Olsa <jolsa@...hat.com>
To: Don Zickus <dzickus@...hat.com>
Cc: acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
jmario@...hat.com, fowles@...each.com, eranian@...gle.com
Subject: Re: [PATCH 02/19] perf, sort: Add physid sorting based on mmap2 data
On Fri, Feb 28, 2014 at 12:42:51PM -0500, Don Zickus wrote:
SNIP
> +static int64_t
> +sort__physid_cmp(struct hist_entry *left, struct hist_entry *right)
> +{
> + u64 l, r;
> + struct map *l_map = left->mem_info->daddr.map;
> + struct map *r_map = right->mem_info->daddr.map;
> +
> + /* store all NULL mem maps at the bottom */
> + /* shouldn't even need this check, should have stubs */
> + if (!left->mem_info->daddr.map || !right->mem_info->daddr.map)
> + return 1;
> +
> + /* group event types together */
> + if (left->cpumode > right->cpumode) return -1;
> + if (left->cpumode < right->cpumode) return 1;
> +
> + if (l_map->maj > r_map->maj) return -1;
> + if (l_map->maj < r_map->maj) return 1;
> +
> + if (l_map->min > r_map->min) return -1;
> + if (l_map->min < r_map->min) return 1;
> +
> + if (l_map->ino > r_map->ino) return -1;
> + if (l_map->ino < r_map->ino) return 1;
> +
> + if (l_map->ino_generation > r_map->ino_generation) return -1;
> + if (l_map->ino_generation < r_map->ino_generation) return 1;
> +
> + /*
> + * Addresses with no major/minor numbers are assumed to be
> + * anonymous in userspace. Sort those on pid then address.
> + *
> + * The kernel and non-zero major/minor mapped areas are
> + * assumed to be unity mapped. Sort those on address then pid.
> + */
> +
> + /* al_addr does all the right addr - start + offset calculations */
> + l = left->mem_info->daddr.al_addr;
> + r = right->mem_info->daddr.al_addr;
> +
> + if (l_map->maj || l_map->min || l_map->ino || l_map-> ino_generation) {
> + /* mmapped areas */
> +
> + /* hack to mark similar regions, 'right' is new entry */
> + /* entries with same maj/min/ino/inogen are in same address space */
> + right->color = TRUE;
> +
> + if (l > r) return -1;
> + if (l < r) return 1;
> +
> + /* sorting by iaddr makes calculations easier later */
> + if (left->mem_info->iaddr.al_addr > right->mem_info->iaddr.al_addr) return -1;
> + if (left->mem_info->iaddr.al_addr < right->mem_info->iaddr.al_addr) return 1;
> +
> + if (left->thread->pid_ > right->thread->pid_) return -1;
> + if (left->thread->pid_ < right->thread->pid_) return 1;
> +
> + if (left->thread->tid > right->thread->tid) return -1;
> + if (left->thread->tid < right->thread->tid) return 1;
> + } else if (left->cpumode == PERF_RECORD_MISC_KERNEL) {
> + /* kernel mapped areas where 'start' doesn't matter */
> +
> + /* hack to mark similar regions, 'right' is new entry */
> + /* whole kernel region is in the same address space */
> + right->color = TRUE;
> +
> + if (l > r) return -1;
> + if (l < r) return 1;
> +
> + /* sorting by iaddr makes calculations easier later */
> + if (left->mem_info->iaddr.al_addr > right->mem_info->iaddr.al_addr) return -1;
> + if (left->mem_info->iaddr.al_addr < right->mem_info->iaddr.al_addr) return 1;
> +
> + if (left->thread->pid_ > right->thread->pid_) return -1;
> + if (left->thread->pid_ < right->thread->pid_) return 1;
> +
> + if (left->thread->tid > right->thread->tid) return -1;
> + if (left->thread->tid < right->thread->tid) return 1;
> + } else {
> + /* userspace anonymous */
> + if (left->thread->pid_ > right->thread->pid_) return -1;
> + if (left->thread->pid_ < right->thread->pid_) return 1;
> +
> + if (left->thread->tid > right->thread->tid) return -1;
> + if (left->thread->tid < right->thread->tid) return 1;
> +
> + /* hack to mark similar regions, 'right' is new entry */
> + /* userspace anonymous address space is contained within pid */
> + right->color = TRUE;
> +
> + if (l > r) return -1;
> + if (l < r) return 1;
> +
> + /* sorting by iaddr makes calculations easier later */
> + if (left->mem_info->iaddr.al_addr > right->mem_info->iaddr.al_addr) return -1;
> + if (left->mem_info->iaddr.al_addr < right->mem_info->iaddr.al_addr) return 1;
> + }
do you need single column for 'physid' ?
my first idea was to have separate sort entries for all checked entries:
(same way like for memory memory_sort_dimensions)
- mem_info->daddr.al_addr (we already have 'addr' check)
- mem_info->iaddr.al_addr
- thread->pid_ (we have only 'tid' check so far)
- l_map->maj, l_map->min, l_map->ino, l_map, ino_generation (we could probably group these)
and init sort order with:
sort_order = "physid,pid,...";
'...' is whatever name you choose for above entries
you can check the sort entries cmp function call
logic in hist_entry__cmp function
jirka
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