Date: Fri, 11 May 2001 19:39:07 +0400 From: "Sergey A. Osokin" <osa@freebsd.org.ru> To: current@FreeBSD.org Subject: new function for libdevstat Message-ID: <20010511193907.A49316@freebsd.org.ru>
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--/04w6evG8XlLl3ft Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hello. 2 monthes ago I talked in -current about new features for libdevstat. Here is a new function, which calculate more statistics then existing compute_stats(). (compute_stats() calculate only average results, not read/write results). Please see my first step. Comments are welcome. -- Rgdz, /"\ Sergey Osokin aka oZZ, \ / ASCII RIBBON CAMPAIGN osa@freebsd.org.ru X AGAINST HTML MAIL http://freebsd.org.ru/~osa/ / \ --/04w6evG8XlLl3ft Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="newstat.c" int devstat_compute_statistics(struct devstat *current, struct devstat *previous, long double etime, u_int64_t *total_bytes, u_int64_t *total_bytes_read, u_int64_t *total_bytes_write, u_int64_t *total_transfers, u_int64_t *total_transfers_read, u_int64_t *total_transfers_write, u_int64_t *total_transfers_other, u_int64_t *total_blocks, u_int64_t *total_blocks_read, u_int64_t *total_blocks_write, long double *kb_per_transfer, long double *kb_per_transfer_read, long double *kb_per_transfer_write, long double *transfers_per_second, long double *transfers_per_second_read, long double *transfers_per_second_write, long double *transfers_per_second_other, long double *mb_per_second, long double *mb_per_second_read, long double *mb_per_second_write, long double *blocks_per_second, long double *blocks_per_second_read, long double *blocks_per_second_write, long double *ms_per_transaction, long double *ms_per_transaction_read, long double *ms_per_transaction_write) { u_int64_t totalbytes, totalbytes_read, totalbytes_write; u_int64_t totaltransfers, totaltransfers_read, totaltransfers_write, totaltransfers_other; u_int64_t totalblocks, totalblocks_read, totalblocks_write; char *func_name = "devstat_compute_statistics"; /* * current is the only mandatory field. */ if (current == NULL) { sprintf(devstat_errbuf, "%s: current stats structure was NULL", func_name); return(-1); } /* totalbytes = (current->bytes_written + current->bytes_read) - ((previous) ? (previous->bytes_written + previous->bytes_read) : 0); if (total_bytes) *total_bytes = totalbytes; */ totalbytes_read = current->bytes_read - ((previous) ? previous->bytes_read) : 0); if (total_bytes_read) *total_bytes_read = totalbytes_read; totalbytes_write = current->bytes_written - ((previous) ? (previous->bytes_written) : 0); if (total_bytes_write) *total_bytes_write = totalbytes_write; totalbytes = totalbytes_read + totalbytes_write; if (total_bytes) *total_bytes = totalbytes; /* totaltransfers = (current->num_reads + current->num_writes + current->num_other) - ((previous) ? (previous->num_reads + previous->num_writes + previous->num_other) : 0); if (total_transfers) *total_transfers = totaltransfers; */ totaltransfers_read = current->num_reads - ((previous) ? (previous->num_reads) : 0); if (total_transfers_read) *total_transfers_read = totaltransfers_read; totaltransfers_write = current->num_writes - ((previous) ? (previous->num_writes) : 0); if (total_transfers_write) *total_transfers_write = totaltransfers_write; totaltransfers_other = current->num_other - ((previous) ? (previous->num_other) : 0); if (total_transfers_other) *total_transfers_other = totaltransfers_other; totaltransfers = totaltransfers_read + totaltransfers_write + totaltransfers_other; if (total_transfers) *total_transfers = totaltransfers; if (transfers_per_second) { if (etime > 0.0) { *transfers_per_second = totaltransfers; *transfers_per_second /= etime; } else *transfers_per_second = 0.0; } if (transfers_per_second_read) { if (etime > 0.0) { *transfers_per_second_read = totaltransfers_read; *transfers_per_second_read /= etime; } else *transfers_per_second_read = 0.0; } if (transfers_per_second_write) { if (etime > 0.0) { *transfers_per_second_write = totaltransfers_write; *transfers_per_second_write /= etime; } else *transfers_per_second_write = 0.0; } if (transfers_per_second_other) { if (etime > 0.0) { *transfers_per_second_other = totaltransfers_other; *transfers_per_second_other /= etime; } else *transfers_per_second_other = 0.0; } if (kb_per_transfer) { *kb_per_transfer = totalbytes; *kb_per_transfer /= 1024; if (totaltransfers > 0) *kb_per_transfer /= totaltransfers; else *kb_per_transfer = 0.0; } if (kb_per_transfer_read) { *kb_per_transfer_read = totalbytes_read; *kb_per_transfer_read /= 1024; if (totaltransfers_read > 0) *kb_per_transfer_read /= totaltransfers_read; else *kb_per_transfer_read = 0.0; } if (kb_per_transfer_write) { *kb_per_transfer_write = totalbytes_write; *kb_per_transfer_write /= 1024; if (totaltransfers_write > 0) *kb_per_transfer_write /= totaltransfers_write; else *kb_per_transfer_write = 0.0; } if (mb_per_second) { *mb_per_second = totalbytes; *mb_per_second /= 1024 * 1024; if (etime > 0.0) *mb_per_second /= etime; else *mb_per_second = 0.0; } if (mb_per_second_read) { *mb_per_second_read = totalbytes_read; *mb_per_second_read /= 1024 * 1024; if (etime > 0.0) *mb_per_second_read /= etime; else *mb_per_second_read = 0.0; } if (mb_per_second_write) { *mb_per_second_write = totalbytes_write; *mb_per_second_write /= 1024 * 1024; if (etime > 0.0) *mb_per_second_write /= etime; else *mb_per_second_write = 0.0; } totalblocks = totalbytes; totalblocks_read = totalbytes_read; totalblocks_write = totalbytes_write; if (current->block_size > 0) { totalblocks /= current->block_size; totalblocks_read /= current->block_size; totalblocks_write /= current->block_size; } else { totalblocks /= 512; totalblocks_read /= 512; totalblocks_write /= 512; } if (total_blocks) *total_blocks = totalblocks; if (total_blocks_read) *total_blocks_read = totalblocks_read; if (total_blocks_write) *total_blocks_write = totalblocks_write; if (blocks_per_second) { *blocks_per_second = totalblocks; if (etime > 0.0) *blocks_per_second /= etime; else *blocks_per_second = 0.0; } if (blocks_per_second_read) { *blocks_per_second_read = totalblocks_read; if (etime > 0.0) *blocks_per_second_read /= etime; else *blocks_per_second_read = 0.0; } if (blocks_per_second_write) { *blocks_per_second_write = totalblocks_write; if (etime > 0.0) *blocks_per_second_write /= etime; else *blocks_per_second_write = 0.0; } if (ms_per_transaction) { if (totaltransfers > 0) { *ms_per_transaction = etime; *ms_per_transaction /= totaltransfers; *ms_per_transaction *= 1000; } else *ms_per_transaction = 0.0; } if (ms_per_transaction_read) { if (totaltransfers_read > 0) { *ms_per_transaction_read = etime; *ms_per_transaction_read /= totaltransfers_read; *ms_per_transaction_read *= 1000; } else *ms_per_transaction_read = 0.0; } if (ms_per_transaction_write) { if (totaltransfers_write > 0) { *ms_per_transaction_write = etime; *ms_per_transaction_write /= totaltransfers_write; *ms_per_transaction_write *= 1000; } else *ms_per_transaction_write = 0.0; } return(0); } --/04w6evG8XlLl3ft-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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